Quick view Details sku: HGC716055 Bluelab pH Probe KCI Storage Solution 120 ml MSRP: Now: $14.84 Add to Cart Compare Quick view Details General Hydroponics | sku: 722080 GH pH Control Kit (12/Cs) MSRP: Now: $17.38 Add to Cart Compare Quick view Details sku: HI5036-050 Hanna Groline Quick Cal 500ml MSRP: Now: $48.00 Add to Cart Compare Quick view Details Bluelab | sku: HGC716441 Bluelab Combo Meter pH/PPM MSRP: Now: $450.36 Out of stock Compare Quick view Details General Hydroponics GH pH 7.01 Calibration Solution MSRP: Now: $7.87 Out of stock Compare Quick view Details Bluelab | sku: HGC716482 Bluelab PPM pen MSRP: Now: $118.80 Add to Cart Compare Quick view Details Bluelab | sku: HGC716050 Bluelab Original Truncheon PPM EC TDS MSRP: Now: $178.80 Add to Cart Compare Quick view Details General Hydroponics GH pH 4.01 Calibration Solution MSRP: Now: $7.76 Choose Options Compare Quick view Details Bluelab | sku: HGC716336 Bluelab Guardian Monitor MSRP: Now: $506.13 Add to Cart Compare Quick view Details sku: LL01825 Luster Leaf Digital Soil Moisture Meter MSRP: Now: $23.02 Out of stock Compare Quick view Details TrolMaster | sku: AMP-2 Aqua-X Sensor Board MSRP: Now: $147.00 Add to Cart Compare Quick view Details sku: HI9814 Hanna Groline Combo pH PPM Temp meter HI9814 MSRP: Now: $649.90 Add to Cart Compare Quick view sku: HGC716055 Bluelab pH Probe KCI Storage Solution 120 ml Bluelab® pH Probe KCI Storage Solution The perfect solution to store and hydrate your Bluelab pH products. Bluelab pH Probe KCl Storage Solution is made specifically for use with Bluelab pH products. It is designed to increase response time and... MSRP: Now: $14.84 Add to Cart Compare Quick view General Hydroponics | sku: 722080 GH pH Control Kit (12/Cs) General Hydroponics® pH Control Kit General Hydroponics pH Control Kit contains 8 oz pH UP, 8 oz pH DOWN, 1 oz indicator and vial MSRP: Now: $17.38 Add to Cart Compare Quick view sku: HI5036-050 Hanna Groline Quick Cal 500ml QuickCal combo solution is: pH 6.86 EC 5.00 mS/cm QuickCal is used by GroLine meters to calibrate pH & EC/PPM at the same time. This makes calibration easier, with less room for error. Using QuickCal means that customers can... MSRP: Now: $48.00 Add to Cart Compare Quick view Bluelab | sku: HGC716441 Bluelab Combo Meter pH/PPM Bluelab® Combo Meter The Bluelab Combo Meter is a conductivity, pH and temperature meter all-in-one. As the Bluelab Combo Meter is portable and does not require a power supply to operate, it can be used anytime and anywhere to help you manage your... MSRP: Now: $450.36 Out of stock Compare Quick view General Hydroponics GH pH 7.01 Calibration Solution General Hydroponics® Meter Calibration Solutions General Hydroponics™ uses the highest-quality reference solutions, allowing growers to calibrate many popular brands of PH, EC and TDS meters (NaCl scale or the 442 scale). General... MSRP: Now: $7.87 Out of stock Compare Quick view Bluelab | sku: HGC716482 Bluelab PPM pen Bluelab® ppm Pen — Now Bluelab® Conductivity Pen Measures conductivity and temperature. Selectable units for conductivity and temperature. Backlit LCD display with low battery warning. Successful calibration indicator and calibration is... MSRP: Now: $118.80 Add to Cart Compare Quick view Bluelab | sku: HGC716050 Bluelab Original Truncheon PPM EC TDS Bluelab Original Truncheon® Nutrient Meter With its super tough, high-quality, fully waterproof design, no calibration required, daylight readable blue LEDs and no on/off buttons to worry about, the Bluelab Truncheon® Nutrient Meter has proven... MSRP: Now: $178.80 Add to Cart Compare Quick view General Hydroponics GH pH 4.01 Calibration Solution General Hydroponics® Meter Calibration Solutions General Hydroponics™ uses the highest-quality reference solutions, allowing growers to calibrate many popular brands of PH, EC and TDS meters (NaCl scale or the 442 scale). General... MSRP: Now: $7.76 Choose Options Compare Quick view Bluelab | sku: HGC716336 Bluelab Guardian Monitor Bluelab® Guardian Monitor Adjustable brightness display. Large easy-to-read, plant-safe green LED displays. Selectable values for conductivity and temperature. Simple push button pH calibration system. No calibration required for conductivity and... MSRP: Now: $506.13 Add to Cart Compare Quick view sku: LL01825 Luster Leaf Digital Soil Moisture Meter Product Details Digital results from 3.5 to 9.0. Instructions and plant pH preference list included. MSRP: Now: $23.02 Out of stock Compare Quick view TrolMaster | sku: AMP-2 Aqua-X Sensor Board Overview: AMP-2 Sensor Board is specially designed for Aqua-X Irrigation Control System. With a male-to-male signal cable, this unit acts as a bridge between the sensors (pH Sensor & EC/Temp Sensor) and the Aqua-X Controller. The pH level, EC level... MSRP: Now: $147.00 Add to Cart Compare Quick view sku: HI9814 Hanna Groline Combo pH PPM Temp meter HI9814 HI9814 GroLine Waterproof Combo meter uses 1 combo probe to measure pH/EC/PPM/Temp. This combo meter is easily calibrated by using just 1 combo pH/EC/PPM calibration solution. Combo pH, EC, and TDS (ppm) probe design... MSRP: Now: $649.90 Add to Cart Compare Previous 1 2 3 4 5 Next Previous 1 2 3 4 5 Next Compare Selected × OK
Quick view Details General Hydroponics | sku: 722080 GH pH Control Kit (12/Cs) MSRP: Now: $17.38 Add to Cart Compare Quick view Details sku: HI5036-050 Hanna Groline Quick Cal 500ml MSRP: Now: $48.00 Add to Cart Compare Quick view Details Bluelab | sku: HGC716441 Bluelab Combo Meter pH/PPM MSRP: Now: $450.36 Out of stock Compare Quick view Details General Hydroponics GH pH 7.01 Calibration Solution MSRP: Now: $7.87 Out of stock Compare Quick view Details Bluelab | sku: HGC716482 Bluelab PPM pen MSRP: Now: $118.80 Add to Cart Compare Quick view Details Bluelab | sku: HGC716050 Bluelab Original Truncheon PPM EC TDS MSRP: Now: $178.80 Add to Cart Compare Quick view Details General Hydroponics GH pH 4.01 Calibration Solution MSRP: Now: $7.76 Choose Options Compare Quick view Details Bluelab | sku: HGC716336 Bluelab Guardian Monitor MSRP: Now: $506.13 Add to Cart Compare Quick view Details sku: LL01825 Luster Leaf Digital Soil Moisture Meter MSRP: Now: $23.02 Out of stock Compare Quick view Details TrolMaster | sku: AMP-2 Aqua-X Sensor Board MSRP: Now: $147.00 Add to Cart Compare Quick view Details sku: HI9814 Hanna Groline Combo pH PPM Temp meter HI9814 MSRP: Now: $649.90 Add to Cart Compare Quick view sku: HGC716055 Bluelab pH Probe KCI Storage Solution 120 ml Bluelab® pH Probe KCI Storage Solution The perfect solution to store and hydrate your Bluelab pH products. Bluelab pH Probe KCl Storage Solution is made specifically for use with Bluelab pH products. It is designed to increase response time and... MSRP: Now: $14.84 Add to Cart Compare Quick view General Hydroponics | sku: 722080 GH pH Control Kit (12/Cs) General Hydroponics® pH Control Kit General Hydroponics pH Control Kit contains 8 oz pH UP, 8 oz pH DOWN, 1 oz indicator and vial MSRP: Now: $17.38 Add to Cart Compare Quick view sku: HI5036-050 Hanna Groline Quick Cal 500ml QuickCal combo solution is: pH 6.86 EC 5.00 mS/cm QuickCal is used by GroLine meters to calibrate pH & EC/PPM at the same time. This makes calibration easier, with less room for error. Using QuickCal means that customers can... MSRP: Now: $48.00 Add to Cart Compare Quick view Bluelab | sku: HGC716441 Bluelab Combo Meter pH/PPM Bluelab® Combo Meter The Bluelab Combo Meter is a conductivity, pH and temperature meter all-in-one. As the Bluelab Combo Meter is portable and does not require a power supply to operate, it can be used anytime and anywhere to help you manage your... MSRP: Now: $450.36 Out of stock Compare Quick view General Hydroponics GH pH 7.01 Calibration Solution General Hydroponics® Meter Calibration Solutions General Hydroponics™ uses the highest-quality reference solutions, allowing growers to calibrate many popular brands of PH, EC and TDS meters (NaCl scale or the 442 scale). General... MSRP: Now: $7.87 Out of stock Compare Quick view Bluelab | sku: HGC716482 Bluelab PPM pen Bluelab® ppm Pen — Now Bluelab® Conductivity Pen Measures conductivity and temperature. Selectable units for conductivity and temperature. Backlit LCD display with low battery warning. Successful calibration indicator and calibration is... MSRP: Now: $118.80 Add to Cart Compare Quick view Bluelab | sku: HGC716050 Bluelab Original Truncheon PPM EC TDS Bluelab Original Truncheon® Nutrient Meter With its super tough, high-quality, fully waterproof design, no calibration required, daylight readable blue LEDs and no on/off buttons to worry about, the Bluelab Truncheon® Nutrient Meter has proven... MSRP: Now: $178.80 Add to Cart Compare Quick view General Hydroponics GH pH 4.01 Calibration Solution General Hydroponics® Meter Calibration Solutions General Hydroponics™ uses the highest-quality reference solutions, allowing growers to calibrate many popular brands of PH, EC and TDS meters (NaCl scale or the 442 scale). General... MSRP: Now: $7.76 Choose Options Compare Quick view Bluelab | sku: HGC716336 Bluelab Guardian Monitor Bluelab® Guardian Monitor Adjustable brightness display. Large easy-to-read, plant-safe green LED displays. Selectable values for conductivity and temperature. Simple push button pH calibration system. No calibration required for conductivity and... MSRP: Now: $506.13 Add to Cart Compare Quick view sku: LL01825 Luster Leaf Digital Soil Moisture Meter Product Details Digital results from 3.5 to 9.0. Instructions and plant pH preference list included. MSRP: Now: $23.02 Out of stock Compare Quick view TrolMaster | sku: AMP-2 Aqua-X Sensor Board Overview: AMP-2 Sensor Board is specially designed for Aqua-X Irrigation Control System. With a male-to-male signal cable, this unit acts as a bridge between the sensors (pH Sensor & EC/Temp Sensor) and the Aqua-X Controller. The pH level, EC level... MSRP: Now: $147.00 Add to Cart Compare Quick view sku: HI9814 Hanna Groline Combo pH PPM Temp meter HI9814 HI9814 GroLine Waterproof Combo meter uses 1 combo probe to measure pH/EC/PPM/Temp. This combo meter is easily calibrated by using just 1 combo pH/EC/PPM calibration solution. Combo pH, EC, and TDS (ppm) probe design... MSRP: Now: $649.90 Add to Cart Compare Previous 1 2 3 4 5 Next Previous 1 2 3 4 5 Next Compare Selected × OK
Quick view Details sku: HI5036-050 Hanna Groline Quick Cal 500ml MSRP: Now: $48.00 Add to Cart Compare Quick view Details Bluelab | sku: HGC716441 Bluelab Combo Meter pH/PPM MSRP: Now: $450.36 Out of stock Compare Quick view Details General Hydroponics GH pH 7.01 Calibration Solution MSRP: Now: $7.87 Out of stock Compare Quick view Details Bluelab | sku: HGC716482 Bluelab PPM pen MSRP: Now: $118.80 Add to Cart Compare Quick view Details Bluelab | sku: HGC716050 Bluelab Original Truncheon PPM EC TDS MSRP: Now: $178.80 Add to Cart Compare Quick view Details General Hydroponics GH pH 4.01 Calibration Solution MSRP: Now: $7.76 Choose Options Compare Quick view Details Bluelab | sku: HGC716336 Bluelab Guardian Monitor MSRP: Now: $506.13 Add to Cart Compare Quick view Details sku: LL01825 Luster Leaf Digital Soil Moisture Meter MSRP: Now: $23.02 Out of stock Compare Quick view Details TrolMaster | sku: AMP-2 Aqua-X Sensor Board MSRP: Now: $147.00 Add to Cart Compare Quick view Details sku: HI9814 Hanna Groline Combo pH PPM Temp meter HI9814 MSRP: Now: $649.90 Add to Cart Compare Quick view sku: HGC716055 Bluelab pH Probe KCI Storage Solution 120 ml Bluelab® pH Probe KCI Storage Solution The perfect solution to store and hydrate your Bluelab pH products. Bluelab pH Probe KCl Storage Solution is made specifically for use with Bluelab pH products. It is designed to increase response time and... MSRP: Now: $14.84 Add to Cart Compare Quick view General Hydroponics | sku: 722080 GH pH Control Kit (12/Cs) General Hydroponics® pH Control Kit General Hydroponics pH Control Kit contains 8 oz pH UP, 8 oz pH DOWN, 1 oz indicator and vial MSRP: Now: $17.38 Add to Cart Compare Quick view sku: HI5036-050 Hanna Groline Quick Cal 500ml QuickCal combo solution is: pH 6.86 EC 5.00 mS/cm QuickCal is used by GroLine meters to calibrate pH & EC/PPM at the same time. This makes calibration easier, with less room for error. Using QuickCal means that customers can... MSRP: Now: $48.00 Add to Cart Compare Quick view Bluelab | sku: HGC716441 Bluelab Combo Meter pH/PPM Bluelab® Combo Meter The Bluelab Combo Meter is a conductivity, pH and temperature meter all-in-one. As the Bluelab Combo Meter is portable and does not require a power supply to operate, it can be used anytime and anywhere to help you manage your... MSRP: Now: $450.36 Out of stock Compare Quick view General Hydroponics GH pH 7.01 Calibration Solution General Hydroponics® Meter Calibration Solutions General Hydroponics™ uses the highest-quality reference solutions, allowing growers to calibrate many popular brands of PH, EC and TDS meters (NaCl scale or the 442 scale). General... MSRP: Now: $7.87 Out of stock Compare Quick view Bluelab | sku: HGC716482 Bluelab PPM pen Bluelab® ppm Pen — Now Bluelab® Conductivity Pen Measures conductivity and temperature. Selectable units for conductivity and temperature. Backlit LCD display with low battery warning. Successful calibration indicator and calibration is... MSRP: Now: $118.80 Add to Cart Compare Quick view Bluelab | sku: HGC716050 Bluelab Original Truncheon PPM EC TDS Bluelab Original Truncheon® Nutrient Meter With its super tough, high-quality, fully waterproof design, no calibration required, daylight readable blue LEDs and no on/off buttons to worry about, the Bluelab Truncheon® Nutrient Meter has proven... MSRP: Now: $178.80 Add to Cart Compare Quick view General Hydroponics GH pH 4.01 Calibration Solution General Hydroponics® Meter Calibration Solutions General Hydroponics™ uses the highest-quality reference solutions, allowing growers to calibrate many popular brands of PH, EC and TDS meters (NaCl scale or the 442 scale). General... MSRP: Now: $7.76 Choose Options Compare Quick view Bluelab | sku: HGC716336 Bluelab Guardian Monitor Bluelab® Guardian Monitor Adjustable brightness display. Large easy-to-read, plant-safe green LED displays. Selectable values for conductivity and temperature. Simple push button pH calibration system. No calibration required for conductivity and... MSRP: Now: $506.13 Add to Cart Compare Quick view sku: LL01825 Luster Leaf Digital Soil Moisture Meter Product Details Digital results from 3.5 to 9.0. Instructions and plant pH preference list included. MSRP: Now: $23.02 Out of stock Compare Quick view TrolMaster | sku: AMP-2 Aqua-X Sensor Board Overview: AMP-2 Sensor Board is specially designed for Aqua-X Irrigation Control System. With a male-to-male signal cable, this unit acts as a bridge between the sensors (pH Sensor & EC/Temp Sensor) and the Aqua-X Controller. The pH level, EC level... MSRP: Now: $147.00 Add to Cart Compare Quick view sku: HI9814 Hanna Groline Combo pH PPM Temp meter HI9814 HI9814 GroLine Waterproof Combo meter uses 1 combo probe to measure pH/EC/PPM/Temp. This combo meter is easily calibrated by using just 1 combo pH/EC/PPM calibration solution. Combo pH, EC, and TDS (ppm) probe design... MSRP: Now: $649.90 Add to Cart Compare Previous 1 2 3 4 5 Next Previous 1 2 3 4 5 Next Compare Selected × OK
Quick view Details Bluelab | sku: HGC716441 Bluelab Combo Meter pH/PPM MSRP: Now: $450.36 Out of stock Compare Quick view Details General Hydroponics GH pH 7.01 Calibration Solution MSRP: Now: $7.87 Out of stock Compare Quick view Details Bluelab | sku: HGC716482 Bluelab PPM pen MSRP: Now: $118.80 Add to Cart Compare Quick view Details Bluelab | sku: HGC716050 Bluelab Original Truncheon PPM EC TDS MSRP: Now: $178.80 Add to Cart Compare Quick view Details General Hydroponics GH pH 4.01 Calibration Solution MSRP: Now: $7.76 Choose Options Compare Quick view Details Bluelab | sku: HGC716336 Bluelab Guardian Monitor MSRP: Now: $506.13 Add to Cart Compare Quick view Details sku: LL01825 Luster Leaf Digital Soil Moisture Meter MSRP: Now: $23.02 Out of stock Compare Quick view Details TrolMaster | sku: AMP-2 Aqua-X Sensor Board MSRP: Now: $147.00 Add to Cart Compare Quick view Details sku: HI9814 Hanna Groline Combo pH PPM Temp meter HI9814 MSRP: Now: $649.90 Add to Cart Compare Quick view sku: HGC716055 Bluelab pH Probe KCI Storage Solution 120 ml Bluelab® pH Probe KCI Storage Solution The perfect solution to store and hydrate your Bluelab pH products. Bluelab pH Probe KCl Storage Solution is made specifically for use with Bluelab pH products. It is designed to increase response time and... MSRP: Now: $14.84 Add to Cart Compare Quick view General Hydroponics | sku: 722080 GH pH Control Kit (12/Cs) General Hydroponics® pH Control Kit General Hydroponics pH Control Kit contains 8 oz pH UP, 8 oz pH DOWN, 1 oz indicator and vial MSRP: Now: $17.38 Add to Cart Compare Quick view sku: HI5036-050 Hanna Groline Quick Cal 500ml QuickCal combo solution is: pH 6.86 EC 5.00 mS/cm QuickCal is used by GroLine meters to calibrate pH & EC/PPM at the same time. This makes calibration easier, with less room for error. Using QuickCal means that customers can... MSRP: Now: $48.00 Add to Cart Compare Quick view Bluelab | sku: HGC716441 Bluelab Combo Meter pH/PPM Bluelab® Combo Meter The Bluelab Combo Meter is a conductivity, pH and temperature meter all-in-one. As the Bluelab Combo Meter is portable and does not require a power supply to operate, it can be used anytime and anywhere to help you manage your... MSRP: Now: $450.36 Out of stock Compare Quick view General Hydroponics GH pH 7.01 Calibration Solution General Hydroponics® Meter Calibration Solutions General Hydroponics™ uses the highest-quality reference solutions, allowing growers to calibrate many popular brands of PH, EC and TDS meters (NaCl scale or the 442 scale). General... MSRP: Now: $7.87 Out of stock Compare Quick view Bluelab | sku: HGC716482 Bluelab PPM pen Bluelab® ppm Pen — Now Bluelab® Conductivity Pen Measures conductivity and temperature. Selectable units for conductivity and temperature. Backlit LCD display with low battery warning. Successful calibration indicator and calibration is... MSRP: Now: $118.80 Add to Cart Compare Quick view Bluelab | sku: HGC716050 Bluelab Original Truncheon PPM EC TDS Bluelab Original Truncheon® Nutrient Meter With its super tough, high-quality, fully waterproof design, no calibration required, daylight readable blue LEDs and no on/off buttons to worry about, the Bluelab Truncheon® Nutrient Meter has proven... MSRP: Now: $178.80 Add to Cart Compare Quick view General Hydroponics GH pH 4.01 Calibration Solution General Hydroponics® Meter Calibration Solutions General Hydroponics™ uses the highest-quality reference solutions, allowing growers to calibrate many popular brands of PH, EC and TDS meters (NaCl scale or the 442 scale). General... MSRP: Now: $7.76 Choose Options Compare Quick view Bluelab | sku: HGC716336 Bluelab Guardian Monitor Bluelab® Guardian Monitor Adjustable brightness display. Large easy-to-read, plant-safe green LED displays. Selectable values for conductivity and temperature. Simple push button pH calibration system. No calibration required for conductivity and... MSRP: Now: $506.13 Add to Cart Compare Quick view sku: LL01825 Luster Leaf Digital Soil Moisture Meter Product Details Digital results from 3.5 to 9.0. Instructions and plant pH preference list included. MSRP: Now: $23.02 Out of stock Compare Quick view TrolMaster | sku: AMP-2 Aqua-X Sensor Board Overview: AMP-2 Sensor Board is specially designed for Aqua-X Irrigation Control System. With a male-to-male signal cable, this unit acts as a bridge between the sensors (pH Sensor & EC/Temp Sensor) and the Aqua-X Controller. The pH level, EC level... MSRP: Now: $147.00 Add to Cart Compare Quick view sku: HI9814 Hanna Groline Combo pH PPM Temp meter HI9814 HI9814 GroLine Waterproof Combo meter uses 1 combo probe to measure pH/EC/PPM/Temp. This combo meter is easily calibrated by using just 1 combo pH/EC/PPM calibration solution. Combo pH, EC, and TDS (ppm) probe design... MSRP: Now: $649.90 Add to Cart Compare Previous 1 2 3 4 5 Next Previous 1 2 3 4 5 Next Compare Selected × OK
Quick view Details General Hydroponics GH pH 7.01 Calibration Solution MSRP: Now: $7.87 Out of stock Compare Quick view Details Bluelab | sku: HGC716482 Bluelab PPM pen MSRP: Now: $118.80 Add to Cart Compare Quick view Details Bluelab | sku: HGC716050 Bluelab Original Truncheon PPM EC TDS MSRP: Now: $178.80 Add to Cart Compare Quick view Details General Hydroponics GH pH 4.01 Calibration Solution MSRP: Now: $7.76 Choose Options Compare Quick view Details Bluelab | sku: HGC716336 Bluelab Guardian Monitor MSRP: Now: $506.13 Add to Cart Compare Quick view Details sku: LL01825 Luster Leaf Digital Soil Moisture Meter MSRP: Now: $23.02 Out of stock Compare Quick view Details TrolMaster | sku: AMP-2 Aqua-X Sensor Board MSRP: Now: $147.00 Add to Cart Compare Quick view Details sku: HI9814 Hanna Groline Combo pH PPM Temp meter HI9814 MSRP: Now: $649.90 Add to Cart Compare Quick view sku: HGC716055 Bluelab pH Probe KCI Storage Solution 120 ml Bluelab® pH Probe KCI Storage Solution The perfect solution to store and hydrate your Bluelab pH products. Bluelab pH Probe KCl Storage Solution is made specifically for use with Bluelab pH products. It is designed to increase response time and... MSRP: Now: $14.84 Add to Cart Compare Quick view General Hydroponics | sku: 722080 GH pH Control Kit (12/Cs) General Hydroponics® pH Control Kit General Hydroponics pH Control Kit contains 8 oz pH UP, 8 oz pH DOWN, 1 oz indicator and vial MSRP: Now: $17.38 Add to Cart Compare Quick view sku: HI5036-050 Hanna Groline Quick Cal 500ml QuickCal combo solution is: pH 6.86 EC 5.00 mS/cm QuickCal is used by GroLine meters to calibrate pH & EC/PPM at the same time. This makes calibration easier, with less room for error. Using QuickCal means that customers can... MSRP: Now: $48.00 Add to Cart Compare Quick view Bluelab | sku: HGC716441 Bluelab Combo Meter pH/PPM Bluelab® Combo Meter The Bluelab Combo Meter is a conductivity, pH and temperature meter all-in-one. As the Bluelab Combo Meter is portable and does not require a power supply to operate, it can be used anytime and anywhere to help you manage your... MSRP: Now: $450.36 Out of stock Compare Quick view General Hydroponics GH pH 7.01 Calibration Solution General Hydroponics® Meter Calibration Solutions General Hydroponics™ uses the highest-quality reference solutions, allowing growers to calibrate many popular brands of PH, EC and TDS meters (NaCl scale or the 442 scale). General... MSRP: Now: $7.87 Out of stock Compare Quick view Bluelab | sku: HGC716482 Bluelab PPM pen Bluelab® ppm Pen — Now Bluelab® Conductivity Pen Measures conductivity and temperature. Selectable units for conductivity and temperature. Backlit LCD display with low battery warning. Successful calibration indicator and calibration is... MSRP: Now: $118.80 Add to Cart Compare Quick view Bluelab | sku: HGC716050 Bluelab Original Truncheon PPM EC TDS Bluelab Original Truncheon® Nutrient Meter With its super tough, high-quality, fully waterproof design, no calibration required, daylight readable blue LEDs and no on/off buttons to worry about, the Bluelab Truncheon® Nutrient Meter has proven... MSRP: Now: $178.80 Add to Cart Compare Quick view General Hydroponics GH pH 4.01 Calibration Solution General Hydroponics® Meter Calibration Solutions General Hydroponics™ uses the highest-quality reference solutions, allowing growers to calibrate many popular brands of PH, EC and TDS meters (NaCl scale or the 442 scale). General... MSRP: Now: $7.76 Choose Options Compare Quick view Bluelab | sku: HGC716336 Bluelab Guardian Monitor Bluelab® Guardian Monitor Adjustable brightness display. Large easy-to-read, plant-safe green LED displays. Selectable values for conductivity and temperature. Simple push button pH calibration system. No calibration required for conductivity and... MSRP: Now: $506.13 Add to Cart Compare Quick view sku: LL01825 Luster Leaf Digital Soil Moisture Meter Product Details Digital results from 3.5 to 9.0. Instructions and plant pH preference list included. MSRP: Now: $23.02 Out of stock Compare Quick view TrolMaster | sku: AMP-2 Aqua-X Sensor Board Overview: AMP-2 Sensor Board is specially designed for Aqua-X Irrigation Control System. With a male-to-male signal cable, this unit acts as a bridge between the sensors (pH Sensor & EC/Temp Sensor) and the Aqua-X Controller. The pH level, EC level... MSRP: Now: $147.00 Add to Cart Compare Quick view sku: HI9814 Hanna Groline Combo pH PPM Temp meter HI9814 HI9814 GroLine Waterproof Combo meter uses 1 combo probe to measure pH/EC/PPM/Temp. This combo meter is easily calibrated by using just 1 combo pH/EC/PPM calibration solution. Combo pH, EC, and TDS (ppm) probe design... MSRP: Now: $649.90 Add to Cart Compare Previous 1 2 3 4 5 Next Previous 1 2 3 4 5 Next Compare Selected × OK
Quick view Details Bluelab | sku: HGC716482 Bluelab PPM pen MSRP: Now: $118.80 Add to Cart Compare Quick view Details Bluelab | sku: HGC716050 Bluelab Original Truncheon PPM EC TDS MSRP: Now: $178.80 Add to Cart Compare Quick view Details General Hydroponics GH pH 4.01 Calibration Solution MSRP: Now: $7.76 Choose Options Compare Quick view Details Bluelab | sku: HGC716336 Bluelab Guardian Monitor MSRP: Now: $506.13 Add to Cart Compare Quick view Details sku: LL01825 Luster Leaf Digital Soil Moisture Meter MSRP: Now: $23.02 Out of stock Compare Quick view Details TrolMaster | sku: AMP-2 Aqua-X Sensor Board MSRP: Now: $147.00 Add to Cart Compare Quick view Details sku: HI9814 Hanna Groline Combo pH PPM Temp meter HI9814 MSRP: Now: $649.90 Add to Cart Compare Quick view sku: HGC716055 Bluelab pH Probe KCI Storage Solution 120 ml Bluelab® pH Probe KCI Storage Solution The perfect solution to store and hydrate your Bluelab pH products. Bluelab pH Probe KCl Storage Solution is made specifically for use with Bluelab pH products. It is designed to increase response time and... MSRP: Now: $14.84 Add to Cart Compare Quick view General Hydroponics | sku: 722080 GH pH Control Kit (12/Cs) General Hydroponics® pH Control Kit General Hydroponics pH Control Kit contains 8 oz pH UP, 8 oz pH DOWN, 1 oz indicator and vial MSRP: Now: $17.38 Add to Cart Compare Quick view sku: HI5036-050 Hanna Groline Quick Cal 500ml QuickCal combo solution is: pH 6.86 EC 5.00 mS/cm QuickCal is used by GroLine meters to calibrate pH & EC/PPM at the same time. This makes calibration easier, with less room for error. Using QuickCal means that customers can... MSRP: Now: $48.00 Add to Cart Compare Quick view Bluelab | sku: HGC716441 Bluelab Combo Meter pH/PPM Bluelab® Combo Meter The Bluelab Combo Meter is a conductivity, pH and temperature meter all-in-one. As the Bluelab Combo Meter is portable and does not require a power supply to operate, it can be used anytime and anywhere to help you manage your... MSRP: Now: $450.36 Out of stock Compare Quick view General Hydroponics GH pH 7.01 Calibration Solution General Hydroponics® Meter Calibration Solutions General Hydroponics™ uses the highest-quality reference solutions, allowing growers to calibrate many popular brands of PH, EC and TDS meters (NaCl scale or the 442 scale). General... MSRP: Now: $7.87 Out of stock Compare Quick view Bluelab | sku: HGC716482 Bluelab PPM pen Bluelab® ppm Pen — Now Bluelab® Conductivity Pen Measures conductivity and temperature. Selectable units for conductivity and temperature. Backlit LCD display with low battery warning. Successful calibration indicator and calibration is... MSRP: Now: $118.80 Add to Cart Compare Quick view Bluelab | sku: HGC716050 Bluelab Original Truncheon PPM EC TDS Bluelab Original Truncheon® Nutrient Meter With its super tough, high-quality, fully waterproof design, no calibration required, daylight readable blue LEDs and no on/off buttons to worry about, the Bluelab Truncheon® Nutrient Meter has proven... MSRP: Now: $178.80 Add to Cart Compare Quick view General Hydroponics GH pH 4.01 Calibration Solution General Hydroponics® Meter Calibration Solutions General Hydroponics™ uses the highest-quality reference solutions, allowing growers to calibrate many popular brands of PH, EC and TDS meters (NaCl scale or the 442 scale). General... MSRP: Now: $7.76 Choose Options Compare Quick view Bluelab | sku: HGC716336 Bluelab Guardian Monitor Bluelab® Guardian Monitor Adjustable brightness display. Large easy-to-read, plant-safe green LED displays. Selectable values for conductivity and temperature. Simple push button pH calibration system. No calibration required for conductivity and... MSRP: Now: $506.13 Add to Cart Compare Quick view sku: LL01825 Luster Leaf Digital Soil Moisture Meter Product Details Digital results from 3.5 to 9.0. Instructions and plant pH preference list included. MSRP: Now: $23.02 Out of stock Compare Quick view TrolMaster | sku: AMP-2 Aqua-X Sensor Board Overview: AMP-2 Sensor Board is specially designed for Aqua-X Irrigation Control System. With a male-to-male signal cable, this unit acts as a bridge between the sensors (pH Sensor & EC/Temp Sensor) and the Aqua-X Controller. The pH level, EC level... MSRP: Now: $147.00 Add to Cart Compare Quick view sku: HI9814 Hanna Groline Combo pH PPM Temp meter HI9814 HI9814 GroLine Waterproof Combo meter uses 1 combo probe to measure pH/EC/PPM/Temp. This combo meter is easily calibrated by using just 1 combo pH/EC/PPM calibration solution. Combo pH, EC, and TDS (ppm) probe design... MSRP: Now: $649.90 Add to Cart Compare Previous 1 2 3 4 5 Next Previous 1 2 3 4 5 Next Compare Selected × OK
Quick view Details Bluelab | sku: HGC716050 Bluelab Original Truncheon PPM EC TDS MSRP: Now: $178.80 Add to Cart Compare Quick view Details General Hydroponics GH pH 4.01 Calibration Solution MSRP: Now: $7.76 Choose Options Compare Quick view Details Bluelab | sku: HGC716336 Bluelab Guardian Monitor MSRP: Now: $506.13 Add to Cart Compare Quick view Details sku: LL01825 Luster Leaf Digital Soil Moisture Meter MSRP: Now: $23.02 Out of stock Compare Quick view Details TrolMaster | sku: AMP-2 Aqua-X Sensor Board MSRP: Now: $147.00 Add to Cart Compare Quick view Details sku: HI9814 Hanna Groline Combo pH PPM Temp meter HI9814 MSRP: Now: $649.90 Add to Cart Compare Quick view sku: HGC716055 Bluelab pH Probe KCI Storage Solution 120 ml Bluelab® pH Probe KCI Storage Solution The perfect solution to store and hydrate your Bluelab pH products. Bluelab pH Probe KCl Storage Solution is made specifically for use with Bluelab pH products. It is designed to increase response time and... MSRP: Now: $14.84 Add to Cart Compare Quick view General Hydroponics | sku: 722080 GH pH Control Kit (12/Cs) General Hydroponics® pH Control Kit General Hydroponics pH Control Kit contains 8 oz pH UP, 8 oz pH DOWN, 1 oz indicator and vial MSRP: Now: $17.38 Add to Cart Compare Quick view sku: HI5036-050 Hanna Groline Quick Cal 500ml QuickCal combo solution is: pH 6.86 EC 5.00 mS/cm QuickCal is used by GroLine meters to calibrate pH & EC/PPM at the same time. This makes calibration easier, with less room for error. Using QuickCal means that customers can... MSRP: Now: $48.00 Add to Cart Compare Quick view Bluelab | sku: HGC716441 Bluelab Combo Meter pH/PPM Bluelab® Combo Meter The Bluelab Combo Meter is a conductivity, pH and temperature meter all-in-one. As the Bluelab Combo Meter is portable and does not require a power supply to operate, it can be used anytime and anywhere to help you manage your... MSRP: Now: $450.36 Out of stock Compare Quick view General Hydroponics GH pH 7.01 Calibration Solution General Hydroponics® Meter Calibration Solutions General Hydroponics™ uses the highest-quality reference solutions, allowing growers to calibrate many popular brands of PH, EC and TDS meters (NaCl scale or the 442 scale). General... MSRP: Now: $7.87 Out of stock Compare Quick view Bluelab | sku: HGC716482 Bluelab PPM pen Bluelab® ppm Pen — Now Bluelab® Conductivity Pen Measures conductivity and temperature. Selectable units for conductivity and temperature. Backlit LCD display with low battery warning. Successful calibration indicator and calibration is... MSRP: Now: $118.80 Add to Cart Compare Quick view Bluelab | sku: HGC716050 Bluelab Original Truncheon PPM EC TDS Bluelab Original Truncheon® Nutrient Meter With its super tough, high-quality, fully waterproof design, no calibration required, daylight readable blue LEDs and no on/off buttons to worry about, the Bluelab Truncheon® Nutrient Meter has proven... MSRP: Now: $178.80 Add to Cart Compare Quick view General Hydroponics GH pH 4.01 Calibration Solution General Hydroponics® Meter Calibration Solutions General Hydroponics™ uses the highest-quality reference solutions, allowing growers to calibrate many popular brands of PH, EC and TDS meters (NaCl scale or the 442 scale). General... MSRP: Now: $7.76 Choose Options Compare Quick view Bluelab | sku: HGC716336 Bluelab Guardian Monitor Bluelab® Guardian Monitor Adjustable brightness display. Large easy-to-read, plant-safe green LED displays. Selectable values for conductivity and temperature. Simple push button pH calibration system. No calibration required for conductivity and... MSRP: Now: $506.13 Add to Cart Compare Quick view sku: LL01825 Luster Leaf Digital Soil Moisture Meter Product Details Digital results from 3.5 to 9.0. Instructions and plant pH preference list included. MSRP: Now: $23.02 Out of stock Compare Quick view TrolMaster | sku: AMP-2 Aqua-X Sensor Board Overview: AMP-2 Sensor Board is specially designed for Aqua-X Irrigation Control System. With a male-to-male signal cable, this unit acts as a bridge between the sensors (pH Sensor & EC/Temp Sensor) and the Aqua-X Controller. The pH level, EC level... MSRP: Now: $147.00 Add to Cart Compare Quick view sku: HI9814 Hanna Groline Combo pH PPM Temp meter HI9814 HI9814 GroLine Waterproof Combo meter uses 1 combo probe to measure pH/EC/PPM/Temp. This combo meter is easily calibrated by using just 1 combo pH/EC/PPM calibration solution. Combo pH, EC, and TDS (ppm) probe design... MSRP: Now: $649.90 Add to Cart Compare Previous 1 2 3 4 5 Next Previous 1 2 3 4 5 Next Compare Selected × OK
Quick view Details General Hydroponics GH pH 4.01 Calibration Solution MSRP: Now: $7.76 Choose Options Compare Quick view Details Bluelab | sku: HGC716336 Bluelab Guardian Monitor MSRP: Now: $506.13 Add to Cart Compare Quick view Details sku: LL01825 Luster Leaf Digital Soil Moisture Meter MSRP: Now: $23.02 Out of stock Compare Quick view Details TrolMaster | sku: AMP-2 Aqua-X Sensor Board MSRP: Now: $147.00 Add to Cart Compare Quick view Details sku: HI9814 Hanna Groline Combo pH PPM Temp meter HI9814 MSRP: Now: $649.90 Add to Cart Compare Quick view sku: HGC716055 Bluelab pH Probe KCI Storage Solution 120 ml Bluelab® pH Probe KCI Storage Solution The perfect solution to store and hydrate your Bluelab pH products. Bluelab pH Probe KCl Storage Solution is made specifically for use with Bluelab pH products. It is designed to increase response time and... MSRP: Now: $14.84 Add to Cart Compare Quick view General Hydroponics | sku: 722080 GH pH Control Kit (12/Cs) General Hydroponics® pH Control Kit General Hydroponics pH Control Kit contains 8 oz pH UP, 8 oz pH DOWN, 1 oz indicator and vial MSRP: Now: $17.38 Add to Cart Compare Quick view sku: HI5036-050 Hanna Groline Quick Cal 500ml QuickCal combo solution is: pH 6.86 EC 5.00 mS/cm QuickCal is used by GroLine meters to calibrate pH & EC/PPM at the same time. This makes calibration easier, with less room for error. Using QuickCal means that customers can... MSRP: Now: $48.00 Add to Cart Compare Quick view Bluelab | sku: HGC716441 Bluelab Combo Meter pH/PPM Bluelab® Combo Meter The Bluelab Combo Meter is a conductivity, pH and temperature meter all-in-one. As the Bluelab Combo Meter is portable and does not require a power supply to operate, it can be used anytime and anywhere to help you manage your... MSRP: Now: $450.36 Out of stock Compare Quick view General Hydroponics GH pH 7.01 Calibration Solution General Hydroponics® Meter Calibration Solutions General Hydroponics™ uses the highest-quality reference solutions, allowing growers to calibrate many popular brands of PH, EC and TDS meters (NaCl scale or the 442 scale). General... MSRP: Now: $7.87 Out of stock Compare Quick view Bluelab | sku: HGC716482 Bluelab PPM pen Bluelab® ppm Pen — Now Bluelab® Conductivity Pen Measures conductivity and temperature. Selectable units for conductivity and temperature. Backlit LCD display with low battery warning. Successful calibration indicator and calibration is... MSRP: Now: $118.80 Add to Cart Compare Quick view Bluelab | sku: HGC716050 Bluelab Original Truncheon PPM EC TDS Bluelab Original Truncheon® Nutrient Meter With its super tough, high-quality, fully waterproof design, no calibration required, daylight readable blue LEDs and no on/off buttons to worry about, the Bluelab Truncheon® Nutrient Meter has proven... MSRP: Now: $178.80 Add to Cart Compare Quick view General Hydroponics GH pH 4.01 Calibration Solution General Hydroponics® Meter Calibration Solutions General Hydroponics™ uses the highest-quality reference solutions, allowing growers to calibrate many popular brands of PH, EC and TDS meters (NaCl scale or the 442 scale). General... MSRP: Now: $7.76 Choose Options Compare Quick view Bluelab | sku: HGC716336 Bluelab Guardian Monitor Bluelab® Guardian Monitor Adjustable brightness display. Large easy-to-read, plant-safe green LED displays. Selectable values for conductivity and temperature. Simple push button pH calibration system. No calibration required for conductivity and... MSRP: Now: $506.13 Add to Cart Compare Quick view sku: LL01825 Luster Leaf Digital Soil Moisture Meter Product Details Digital results from 3.5 to 9.0. Instructions and plant pH preference list included. MSRP: Now: $23.02 Out of stock Compare Quick view TrolMaster | sku: AMP-2 Aqua-X Sensor Board Overview: AMP-2 Sensor Board is specially designed for Aqua-X Irrigation Control System. With a male-to-male signal cable, this unit acts as a bridge between the sensors (pH Sensor & EC/Temp Sensor) and the Aqua-X Controller. The pH level, EC level... MSRP: Now: $147.00 Add to Cart Compare Quick view sku: HI9814 Hanna Groline Combo pH PPM Temp meter HI9814 HI9814 GroLine Waterproof Combo meter uses 1 combo probe to measure pH/EC/PPM/Temp. This combo meter is easily calibrated by using just 1 combo pH/EC/PPM calibration solution. Combo pH, EC, and TDS (ppm) probe design... MSRP: Now: $649.90 Add to Cart Compare Previous 1 2 3 4 5 Next Previous 1 2 3 4 5 Next Compare Selected × OK
Quick view Details Bluelab | sku: HGC716336 Bluelab Guardian Monitor MSRP: Now: $506.13 Add to Cart Compare Quick view Details sku: LL01825 Luster Leaf Digital Soil Moisture Meter MSRP: Now: $23.02 Out of stock Compare Quick view Details TrolMaster | sku: AMP-2 Aqua-X Sensor Board MSRP: Now: $147.00 Add to Cart Compare Quick view Details sku: HI9814 Hanna Groline Combo pH PPM Temp meter HI9814 MSRP: Now: $649.90 Add to Cart Compare Quick view sku: HGC716055 Bluelab pH Probe KCI Storage Solution 120 ml Bluelab® pH Probe KCI Storage Solution The perfect solution to store and hydrate your Bluelab pH products. Bluelab pH Probe KCl Storage Solution is made specifically for use with Bluelab pH products. It is designed to increase response time and... MSRP: Now: $14.84 Add to Cart Compare Quick view General Hydroponics | sku: 722080 GH pH Control Kit (12/Cs) General Hydroponics® pH Control Kit General Hydroponics pH Control Kit contains 8 oz pH UP, 8 oz pH DOWN, 1 oz indicator and vial MSRP: Now: $17.38 Add to Cart Compare Quick view sku: HI5036-050 Hanna Groline Quick Cal 500ml QuickCal combo solution is: pH 6.86 EC 5.00 mS/cm QuickCal is used by GroLine meters to calibrate pH & EC/PPM at the same time. This makes calibration easier, with less room for error. Using QuickCal means that customers can... MSRP: Now: $48.00 Add to Cart Compare Quick view Bluelab | sku: HGC716441 Bluelab Combo Meter pH/PPM Bluelab® Combo Meter The Bluelab Combo Meter is a conductivity, pH and temperature meter all-in-one. As the Bluelab Combo Meter is portable and does not require a power supply to operate, it can be used anytime and anywhere to help you manage your... MSRP: Now: $450.36 Out of stock Compare Quick view General Hydroponics GH pH 7.01 Calibration Solution General Hydroponics® Meter Calibration Solutions General Hydroponics™ uses the highest-quality reference solutions, allowing growers to calibrate many popular brands of PH, EC and TDS meters (NaCl scale or the 442 scale). General... MSRP: Now: $7.87 Out of stock Compare Quick view Bluelab | sku: HGC716482 Bluelab PPM pen Bluelab® ppm Pen — Now Bluelab® Conductivity Pen Measures conductivity and temperature. Selectable units for conductivity and temperature. Backlit LCD display with low battery warning. Successful calibration indicator and calibration is... MSRP: Now: $118.80 Add to Cart Compare Quick view Bluelab | sku: HGC716050 Bluelab Original Truncheon PPM EC TDS Bluelab Original Truncheon® Nutrient Meter With its super tough, high-quality, fully waterproof design, no calibration required, daylight readable blue LEDs and no on/off buttons to worry about, the Bluelab Truncheon® Nutrient Meter has proven... MSRP: Now: $178.80 Add to Cart Compare Quick view General Hydroponics GH pH 4.01 Calibration Solution General Hydroponics® Meter Calibration Solutions General Hydroponics™ uses the highest-quality reference solutions, allowing growers to calibrate many popular brands of PH, EC and TDS meters (NaCl scale or the 442 scale). General... MSRP: Now: $7.76 Choose Options Compare Quick view Bluelab | sku: HGC716336 Bluelab Guardian Monitor Bluelab® Guardian Monitor Adjustable brightness display. Large easy-to-read, plant-safe green LED displays. Selectable values for conductivity and temperature. Simple push button pH calibration system. No calibration required for conductivity and... MSRP: Now: $506.13 Add to Cart Compare Quick view sku: LL01825 Luster Leaf Digital Soil Moisture Meter Product Details Digital results from 3.5 to 9.0. Instructions and plant pH preference list included. MSRP: Now: $23.02 Out of stock Compare Quick view TrolMaster | sku: AMP-2 Aqua-X Sensor Board Overview: AMP-2 Sensor Board is specially designed for Aqua-X Irrigation Control System. With a male-to-male signal cable, this unit acts as a bridge between the sensors (pH Sensor & EC/Temp Sensor) and the Aqua-X Controller. The pH level, EC level... MSRP: Now: $147.00 Add to Cart Compare Quick view sku: HI9814 Hanna Groline Combo pH PPM Temp meter HI9814 HI9814 GroLine Waterproof Combo meter uses 1 combo probe to measure pH/EC/PPM/Temp. This combo meter is easily calibrated by using just 1 combo pH/EC/PPM calibration solution. Combo pH, EC, and TDS (ppm) probe design... MSRP: Now: $649.90 Add to Cart Compare Previous 1 2 3 4 5 Next Previous 1 2 3 4 5 Next Compare Selected × OK
Quick view Details sku: LL01825 Luster Leaf Digital Soil Moisture Meter MSRP: Now: $23.02 Out of stock Compare Quick view Details TrolMaster | sku: AMP-2 Aqua-X Sensor Board MSRP: Now: $147.00 Add to Cart Compare Quick view Details sku: HI9814 Hanna Groline Combo pH PPM Temp meter HI9814 MSRP: Now: $649.90 Add to Cart Compare Quick view sku: HGC716055 Bluelab pH Probe KCI Storage Solution 120 ml Bluelab® pH Probe KCI Storage Solution The perfect solution to store and hydrate your Bluelab pH products. Bluelab pH Probe KCl Storage Solution is made specifically for use with Bluelab pH products. It is designed to increase response time and... MSRP: Now: $14.84 Add to Cart Compare Quick view General Hydroponics | sku: 722080 GH pH Control Kit (12/Cs) General Hydroponics® pH Control Kit General Hydroponics pH Control Kit contains 8 oz pH UP, 8 oz pH DOWN, 1 oz indicator and vial MSRP: Now: $17.38 Add to Cart Compare Quick view sku: HI5036-050 Hanna Groline Quick Cal 500ml QuickCal combo solution is: pH 6.86 EC 5.00 mS/cm QuickCal is used by GroLine meters to calibrate pH & EC/PPM at the same time. This makes calibration easier, with less room for error. Using QuickCal means that customers can... MSRP: Now: $48.00 Add to Cart Compare Quick view Bluelab | sku: HGC716441 Bluelab Combo Meter pH/PPM Bluelab® Combo Meter The Bluelab Combo Meter is a conductivity, pH and temperature meter all-in-one. As the Bluelab Combo Meter is portable and does not require a power supply to operate, it can be used anytime and anywhere to help you manage your... MSRP: Now: $450.36 Out of stock Compare Quick view General Hydroponics GH pH 7.01 Calibration Solution General Hydroponics® Meter Calibration Solutions General Hydroponics™ uses the highest-quality reference solutions, allowing growers to calibrate many popular brands of PH, EC and TDS meters (NaCl scale or the 442 scale). General... MSRP: Now: $7.87 Out of stock Compare Quick view Bluelab | sku: HGC716482 Bluelab PPM pen Bluelab® ppm Pen — Now Bluelab® Conductivity Pen Measures conductivity and temperature. Selectable units for conductivity and temperature. Backlit LCD display with low battery warning. Successful calibration indicator and calibration is... MSRP: Now: $118.80 Add to Cart Compare Quick view Bluelab | sku: HGC716050 Bluelab Original Truncheon PPM EC TDS Bluelab Original Truncheon® Nutrient Meter With its super tough, high-quality, fully waterproof design, no calibration required, daylight readable blue LEDs and no on/off buttons to worry about, the Bluelab Truncheon® Nutrient Meter has proven... MSRP: Now: $178.80 Add to Cart Compare Quick view General Hydroponics GH pH 4.01 Calibration Solution General Hydroponics® Meter Calibration Solutions General Hydroponics™ uses the highest-quality reference solutions, allowing growers to calibrate many popular brands of PH, EC and TDS meters (NaCl scale or the 442 scale). General... MSRP: Now: $7.76 Choose Options Compare Quick view Bluelab | sku: HGC716336 Bluelab Guardian Monitor Bluelab® Guardian Monitor Adjustable brightness display. Large easy-to-read, plant-safe green LED displays. Selectable values for conductivity and temperature. Simple push button pH calibration system. No calibration required for conductivity and... MSRP: Now: $506.13 Add to Cart Compare Quick view sku: LL01825 Luster Leaf Digital Soil Moisture Meter Product Details Digital results from 3.5 to 9.0. Instructions and plant pH preference list included. MSRP: Now: $23.02 Out of stock Compare Quick view TrolMaster | sku: AMP-2 Aqua-X Sensor Board Overview: AMP-2 Sensor Board is specially designed for Aqua-X Irrigation Control System. With a male-to-male signal cable, this unit acts as a bridge between the sensors (pH Sensor & EC/Temp Sensor) and the Aqua-X Controller. The pH level, EC level... MSRP: Now: $147.00 Add to Cart Compare Quick view sku: HI9814 Hanna Groline Combo pH PPM Temp meter HI9814 HI9814 GroLine Waterproof Combo meter uses 1 combo probe to measure pH/EC/PPM/Temp. This combo meter is easily calibrated by using just 1 combo pH/EC/PPM calibration solution. Combo pH, EC, and TDS (ppm) probe design... MSRP: Now: $649.90 Add to Cart Compare Previous 1 2 3 4 5 Next Previous 1 2 3 4 5 Next Compare Selected × OK
Quick view Details TrolMaster | sku: AMP-2 Aqua-X Sensor Board MSRP: Now: $147.00 Add to Cart Compare Quick view Details sku: HI9814 Hanna Groline Combo pH PPM Temp meter HI9814 MSRP: Now: $649.90 Add to Cart Compare Quick view sku: HGC716055 Bluelab pH Probe KCI Storage Solution 120 ml Bluelab® pH Probe KCI Storage Solution The perfect solution to store and hydrate your Bluelab pH products. Bluelab pH Probe KCl Storage Solution is made specifically for use with Bluelab pH products. It is designed to increase response time and... MSRP: Now: $14.84 Add to Cart Compare Quick view General Hydroponics | sku: 722080 GH pH Control Kit (12/Cs) General Hydroponics® pH Control Kit General Hydroponics pH Control Kit contains 8 oz pH UP, 8 oz pH DOWN, 1 oz indicator and vial MSRP: Now: $17.38 Add to Cart Compare Quick view sku: HI5036-050 Hanna Groline Quick Cal 500ml QuickCal combo solution is: pH 6.86 EC 5.00 mS/cm QuickCal is used by GroLine meters to calibrate pH & EC/PPM at the same time. This makes calibration easier, with less room for error. Using QuickCal means that customers can... MSRP: Now: $48.00 Add to Cart Compare Quick view Bluelab | sku: HGC716441 Bluelab Combo Meter pH/PPM Bluelab® Combo Meter The Bluelab Combo Meter is a conductivity, pH and temperature meter all-in-one. As the Bluelab Combo Meter is portable and does not require a power supply to operate, it can be used anytime and anywhere to help you manage your... MSRP: Now: $450.36 Out of stock Compare Quick view General Hydroponics GH pH 7.01 Calibration Solution General Hydroponics® Meter Calibration Solutions General Hydroponics™ uses the highest-quality reference solutions, allowing growers to calibrate many popular brands of PH, EC and TDS meters (NaCl scale or the 442 scale). General... MSRP: Now: $7.87 Out of stock Compare Quick view Bluelab | sku: HGC716482 Bluelab PPM pen Bluelab® ppm Pen — Now Bluelab® Conductivity Pen Measures conductivity and temperature. Selectable units for conductivity and temperature. Backlit LCD display with low battery warning. Successful calibration indicator and calibration is... MSRP: Now: $118.80 Add to Cart Compare Quick view Bluelab | sku: HGC716050 Bluelab Original Truncheon PPM EC TDS Bluelab Original Truncheon® Nutrient Meter With its super tough, high-quality, fully waterproof design, no calibration required, daylight readable blue LEDs and no on/off buttons to worry about, the Bluelab Truncheon® Nutrient Meter has proven... MSRP: Now: $178.80 Add to Cart Compare Quick view General Hydroponics GH pH 4.01 Calibration Solution General Hydroponics® Meter Calibration Solutions General Hydroponics™ uses the highest-quality reference solutions, allowing growers to calibrate many popular brands of PH, EC and TDS meters (NaCl scale or the 442 scale). General... MSRP: Now: $7.76 Choose Options Compare Quick view Bluelab | sku: HGC716336 Bluelab Guardian Monitor Bluelab® Guardian Monitor Adjustable brightness display. Large easy-to-read, plant-safe green LED displays. Selectable values for conductivity and temperature. Simple push button pH calibration system. No calibration required for conductivity and... MSRP: Now: $506.13 Add to Cart Compare Quick view sku: LL01825 Luster Leaf Digital Soil Moisture Meter Product Details Digital results from 3.5 to 9.0. Instructions and plant pH preference list included. MSRP: Now: $23.02 Out of stock Compare Quick view TrolMaster | sku: AMP-2 Aqua-X Sensor Board Overview: AMP-2 Sensor Board is specially designed for Aqua-X Irrigation Control System. With a male-to-male signal cable, this unit acts as a bridge between the sensors (pH Sensor & EC/Temp Sensor) and the Aqua-X Controller. The pH level, EC level... MSRP: Now: $147.00 Add to Cart Compare Quick view sku: HI9814 Hanna Groline Combo pH PPM Temp meter HI9814 HI9814 GroLine Waterproof Combo meter uses 1 combo probe to measure pH/EC/PPM/Temp. This combo meter is easily calibrated by using just 1 combo pH/EC/PPM calibration solution. Combo pH, EC, and TDS (ppm) probe design... MSRP: Now: $649.90 Add to Cart Compare Previous 1 2 3 4 5 Next Previous 1 2 3 4 5 Next Compare Selected × OK
Quick view Details sku: HI9814 Hanna Groline Combo pH PPM Temp meter HI9814 MSRP: Now: $649.90 Add to Cart Compare Quick view sku: HGC716055 Bluelab pH Probe KCI Storage Solution 120 ml Bluelab® pH Probe KCI Storage Solution The perfect solution to store and hydrate your Bluelab pH products. Bluelab pH Probe KCl Storage Solution is made specifically for use with Bluelab pH products. It is designed to increase response time and... MSRP: Now: $14.84 Add to Cart Compare Quick view General Hydroponics | sku: 722080 GH pH Control Kit (12/Cs) General Hydroponics® pH Control Kit General Hydroponics pH Control Kit contains 8 oz pH UP, 8 oz pH DOWN, 1 oz indicator and vial MSRP: Now: $17.38 Add to Cart Compare Quick view sku: HI5036-050 Hanna Groline Quick Cal 500ml QuickCal combo solution is: pH 6.86 EC 5.00 mS/cm QuickCal is used by GroLine meters to calibrate pH & EC/PPM at the same time. This makes calibration easier, with less room for error. Using QuickCal means that customers can... MSRP: Now: $48.00 Add to Cart Compare Quick view Bluelab | sku: HGC716441 Bluelab Combo Meter pH/PPM Bluelab® Combo Meter The Bluelab Combo Meter is a conductivity, pH and temperature meter all-in-one. As the Bluelab Combo Meter is portable and does not require a power supply to operate, it can be used anytime and anywhere to help you manage your... MSRP: Now: $450.36 Out of stock Compare Quick view General Hydroponics GH pH 7.01 Calibration Solution General Hydroponics® Meter Calibration Solutions General Hydroponics™ uses the highest-quality reference solutions, allowing growers to calibrate many popular brands of PH, EC and TDS meters (NaCl scale or the 442 scale). General... MSRP: Now: $7.87 Out of stock Compare Quick view Bluelab | sku: HGC716482 Bluelab PPM pen Bluelab® ppm Pen — Now Bluelab® Conductivity Pen Measures conductivity and temperature. Selectable units for conductivity and temperature. Backlit LCD display with low battery warning. Successful calibration indicator and calibration is... MSRP: Now: $118.80 Add to Cart Compare Quick view Bluelab | sku: HGC716050 Bluelab Original Truncheon PPM EC TDS Bluelab Original Truncheon® Nutrient Meter With its super tough, high-quality, fully waterproof design, no calibration required, daylight readable blue LEDs and no on/off buttons to worry about, the Bluelab Truncheon® Nutrient Meter has proven... MSRP: Now: $178.80 Add to Cart Compare Quick view General Hydroponics GH pH 4.01 Calibration Solution General Hydroponics® Meter Calibration Solutions General Hydroponics™ uses the highest-quality reference solutions, allowing growers to calibrate many popular brands of PH, EC and TDS meters (NaCl scale or the 442 scale). General... MSRP: Now: $7.76 Choose Options Compare Quick view Bluelab | sku: HGC716336 Bluelab Guardian Monitor Bluelab® Guardian Monitor Adjustable brightness display. Large easy-to-read, plant-safe green LED displays. Selectable values for conductivity and temperature. Simple push button pH calibration system. No calibration required for conductivity and... MSRP: Now: $506.13 Add to Cart Compare Quick view sku: LL01825 Luster Leaf Digital Soil Moisture Meter Product Details Digital results from 3.5 to 9.0. Instructions and plant pH preference list included. MSRP: Now: $23.02 Out of stock Compare Quick view TrolMaster | sku: AMP-2 Aqua-X Sensor Board Overview: AMP-2 Sensor Board is specially designed for Aqua-X Irrigation Control System. With a male-to-male signal cable, this unit acts as a bridge between the sensors (pH Sensor & EC/Temp Sensor) and the Aqua-X Controller. The pH level, EC level... MSRP: Now: $147.00 Add to Cart Compare Quick view sku: HI9814 Hanna Groline Combo pH PPM Temp meter HI9814 HI9814 GroLine Waterproof Combo meter uses 1 combo probe to measure pH/EC/PPM/Temp. This combo meter is easily calibrated by using just 1 combo pH/EC/PPM calibration solution. Combo pH, EC, and TDS (ppm) probe design... MSRP: Now: $649.90 Add to Cart Compare Previous 1 2 3 4 5 Next Previous 1 2 3 4 5 Next Compare Selected × OK
Quick view sku: HGC716055 Bluelab pH Probe KCI Storage Solution 120 ml Bluelab® pH Probe KCI Storage Solution The perfect solution to store and hydrate your Bluelab pH products. Bluelab pH Probe KCl Storage Solution is made specifically for use with Bluelab pH products. It is designed to increase response time and... MSRP: Now: $14.84 Add to Cart Compare Quick view General Hydroponics | sku: 722080 GH pH Control Kit (12/Cs) General Hydroponics® pH Control Kit General Hydroponics pH Control Kit contains 8 oz pH UP, 8 oz pH DOWN, 1 oz indicator and vial MSRP: Now: $17.38 Add to Cart Compare Quick view sku: HI5036-050 Hanna Groline Quick Cal 500ml QuickCal combo solution is: pH 6.86 EC 5.00 mS/cm QuickCal is used by GroLine meters to calibrate pH & EC/PPM at the same time. This makes calibration easier, with less room for error. Using QuickCal means that customers can... MSRP: Now: $48.00 Add to Cart Compare Quick view Bluelab | sku: HGC716441 Bluelab Combo Meter pH/PPM Bluelab® Combo Meter The Bluelab Combo Meter is a conductivity, pH and temperature meter all-in-one. As the Bluelab Combo Meter is portable and does not require a power supply to operate, it can be used anytime and anywhere to help you manage your... MSRP: Now: $450.36 Out of stock Compare Quick view General Hydroponics GH pH 7.01 Calibration Solution General Hydroponics® Meter Calibration Solutions General Hydroponics™ uses the highest-quality reference solutions, allowing growers to calibrate many popular brands of PH, EC and TDS meters (NaCl scale or the 442 scale). General... MSRP: Now: $7.87 Out of stock Compare Quick view Bluelab | sku: HGC716482 Bluelab PPM pen Bluelab® ppm Pen — Now Bluelab® Conductivity Pen Measures conductivity and temperature. Selectable units for conductivity and temperature. Backlit LCD display with low battery warning. Successful calibration indicator and calibration is... MSRP: Now: $118.80 Add to Cart Compare Quick view Bluelab | sku: HGC716050 Bluelab Original Truncheon PPM EC TDS Bluelab Original Truncheon® Nutrient Meter With its super tough, high-quality, fully waterproof design, no calibration required, daylight readable blue LEDs and no on/off buttons to worry about, the Bluelab Truncheon® Nutrient Meter has proven... MSRP: Now: $178.80 Add to Cart Compare Quick view General Hydroponics GH pH 4.01 Calibration Solution General Hydroponics® Meter Calibration Solutions General Hydroponics™ uses the highest-quality reference solutions, allowing growers to calibrate many popular brands of PH, EC and TDS meters (NaCl scale or the 442 scale). General... MSRP: Now: $7.76 Choose Options Compare Quick view Bluelab | sku: HGC716336 Bluelab Guardian Monitor Bluelab® Guardian Monitor Adjustable brightness display. Large easy-to-read, plant-safe green LED displays. Selectable values for conductivity and temperature. Simple push button pH calibration system. No calibration required for conductivity and... MSRP: Now: $506.13 Add to Cart Compare Quick view sku: LL01825 Luster Leaf Digital Soil Moisture Meter Product Details Digital results from 3.5 to 9.0. Instructions and plant pH preference list included. MSRP: Now: $23.02 Out of stock Compare Quick view TrolMaster | sku: AMP-2 Aqua-X Sensor Board Overview: AMP-2 Sensor Board is specially designed for Aqua-X Irrigation Control System. With a male-to-male signal cable, this unit acts as a bridge between the sensors (pH Sensor & EC/Temp Sensor) and the Aqua-X Controller. The pH level, EC level... MSRP: Now: $147.00 Add to Cart Compare Quick view sku: HI9814 Hanna Groline Combo pH PPM Temp meter HI9814 HI9814 GroLine Waterproof Combo meter uses 1 combo probe to measure pH/EC/PPM/Temp. This combo meter is easily calibrated by using just 1 combo pH/EC/PPM calibration solution. Combo pH, EC, and TDS (ppm) probe design... MSRP: Now: $649.90 Add to Cart Compare Previous 1 2 3 4 5 Next Previous 1 2 3 4 5 Next Compare Selected × OK
Quick view General Hydroponics | sku: 722080 GH pH Control Kit (12/Cs) General Hydroponics® pH Control Kit General Hydroponics pH Control Kit contains 8 oz pH UP, 8 oz pH DOWN, 1 oz indicator and vial MSRP: Now: $17.38 Add to Cart Compare Quick view sku: HI5036-050 Hanna Groline Quick Cal 500ml QuickCal combo solution is: pH 6.86 EC 5.00 mS/cm QuickCal is used by GroLine meters to calibrate pH & EC/PPM at the same time. This makes calibration easier, with less room for error. Using QuickCal means that customers can... MSRP: Now: $48.00 Add to Cart Compare Quick view Bluelab | sku: HGC716441 Bluelab Combo Meter pH/PPM Bluelab® Combo Meter The Bluelab Combo Meter is a conductivity, pH and temperature meter all-in-one. As the Bluelab Combo Meter is portable and does not require a power supply to operate, it can be used anytime and anywhere to help you manage your... MSRP: Now: $450.36 Out of stock Compare Quick view General Hydroponics GH pH 7.01 Calibration Solution General Hydroponics® Meter Calibration Solutions General Hydroponics™ uses the highest-quality reference solutions, allowing growers to calibrate many popular brands of PH, EC and TDS meters (NaCl scale or the 442 scale). General... MSRP: Now: $7.87 Out of stock Compare Quick view Bluelab | sku: HGC716482 Bluelab PPM pen Bluelab® ppm Pen — Now Bluelab® Conductivity Pen Measures conductivity and temperature. Selectable units for conductivity and temperature. Backlit LCD display with low battery warning. Successful calibration indicator and calibration is... MSRP: Now: $118.80 Add to Cart Compare Quick view Bluelab | sku: HGC716050 Bluelab Original Truncheon PPM EC TDS Bluelab Original Truncheon® Nutrient Meter With its super tough, high-quality, fully waterproof design, no calibration required, daylight readable blue LEDs and no on/off buttons to worry about, the Bluelab Truncheon® Nutrient Meter has proven... MSRP: Now: $178.80 Add to Cart Compare Quick view General Hydroponics GH pH 4.01 Calibration Solution General Hydroponics® Meter Calibration Solutions General Hydroponics™ uses the highest-quality reference solutions, allowing growers to calibrate many popular brands of PH, EC and TDS meters (NaCl scale or the 442 scale). General... MSRP: Now: $7.76 Choose Options Compare Quick view Bluelab | sku: HGC716336 Bluelab Guardian Monitor Bluelab® Guardian Monitor Adjustable brightness display. Large easy-to-read, plant-safe green LED displays. Selectable values for conductivity and temperature. Simple push button pH calibration system. No calibration required for conductivity and... MSRP: Now: $506.13 Add to Cart Compare Quick view sku: LL01825 Luster Leaf Digital Soil Moisture Meter Product Details Digital results from 3.5 to 9.0. Instructions and plant pH preference list included. MSRP: Now: $23.02 Out of stock Compare Quick view TrolMaster | sku: AMP-2 Aqua-X Sensor Board Overview: AMP-2 Sensor Board is specially designed for Aqua-X Irrigation Control System. With a male-to-male signal cable, this unit acts as a bridge between the sensors (pH Sensor & EC/Temp Sensor) and the Aqua-X Controller. The pH level, EC level... MSRP: Now: $147.00 Add to Cart Compare Quick view sku: HI9814 Hanna Groline Combo pH PPM Temp meter HI9814 HI9814 GroLine Waterproof Combo meter uses 1 combo probe to measure pH/EC/PPM/Temp. This combo meter is easily calibrated by using just 1 combo pH/EC/PPM calibration solution. Combo pH, EC, and TDS (ppm) probe design... MSRP: Now: $649.90 Add to Cart Compare Previous 1 2 3 4 5 Next Previous 1 2 3 4 5 Next Compare Selected × OK
Quick view sku: HI5036-050 Hanna Groline Quick Cal 500ml QuickCal combo solution is: pH 6.86 EC 5.00 mS/cm QuickCal is used by GroLine meters to calibrate pH & EC/PPM at the same time. This makes calibration easier, with less room for error. Using QuickCal means that customers can... MSRP: Now: $48.00 Add to Cart Compare Quick view Bluelab | sku: HGC716441 Bluelab Combo Meter pH/PPM Bluelab® Combo Meter The Bluelab Combo Meter is a conductivity, pH and temperature meter all-in-one. As the Bluelab Combo Meter is portable and does not require a power supply to operate, it can be used anytime and anywhere to help you manage your... MSRP: Now: $450.36 Out of stock Compare Quick view General Hydroponics GH pH 7.01 Calibration Solution General Hydroponics® Meter Calibration Solutions General Hydroponics™ uses the highest-quality reference solutions, allowing growers to calibrate many popular brands of PH, EC and TDS meters (NaCl scale or the 442 scale). General... MSRP: Now: $7.87 Out of stock Compare Quick view Bluelab | sku: HGC716482 Bluelab PPM pen Bluelab® ppm Pen — Now Bluelab® Conductivity Pen Measures conductivity and temperature. Selectable units for conductivity and temperature. Backlit LCD display with low battery warning. Successful calibration indicator and calibration is... MSRP: Now: $118.80 Add to Cart Compare Quick view Bluelab | sku: HGC716050 Bluelab Original Truncheon PPM EC TDS Bluelab Original Truncheon® Nutrient Meter With its super tough, high-quality, fully waterproof design, no calibration required, daylight readable blue LEDs and no on/off buttons to worry about, the Bluelab Truncheon® Nutrient Meter has proven... MSRP: Now: $178.80 Add to Cart Compare Quick view General Hydroponics GH pH 4.01 Calibration Solution General Hydroponics® Meter Calibration Solutions General Hydroponics™ uses the highest-quality reference solutions, allowing growers to calibrate many popular brands of PH, EC and TDS meters (NaCl scale or the 442 scale). General... MSRP: Now: $7.76 Choose Options Compare Quick view Bluelab | sku: HGC716336 Bluelab Guardian Monitor Bluelab® Guardian Monitor Adjustable brightness display. Large easy-to-read, plant-safe green LED displays. Selectable values for conductivity and temperature. Simple push button pH calibration system. No calibration required for conductivity and... MSRP: Now: $506.13 Add to Cart Compare Quick view sku: LL01825 Luster Leaf Digital Soil Moisture Meter Product Details Digital results from 3.5 to 9.0. Instructions and plant pH preference list included. MSRP: Now: $23.02 Out of stock Compare Quick view TrolMaster | sku: AMP-2 Aqua-X Sensor Board Overview: AMP-2 Sensor Board is specially designed for Aqua-X Irrigation Control System. With a male-to-male signal cable, this unit acts as a bridge between the sensors (pH Sensor & EC/Temp Sensor) and the Aqua-X Controller. The pH level, EC level... MSRP: Now: $147.00 Add to Cart Compare Quick view sku: HI9814 Hanna Groline Combo pH PPM Temp meter HI9814 HI9814 GroLine Waterproof Combo meter uses 1 combo probe to measure pH/EC/PPM/Temp. This combo meter is easily calibrated by using just 1 combo pH/EC/PPM calibration solution. Combo pH, EC, and TDS (ppm) probe design... MSRP: Now: $649.90 Add to Cart Compare Previous 1 2 3 4 5 Next Previous 1 2 3 4 5 Next Compare Selected × OK
Quick view Bluelab | sku: HGC716441 Bluelab Combo Meter pH/PPM Bluelab® Combo Meter The Bluelab Combo Meter is a conductivity, pH and temperature meter all-in-one. As the Bluelab Combo Meter is portable and does not require a power supply to operate, it can be used anytime and anywhere to help you manage your... MSRP: Now: $450.36 Out of stock Compare Quick view General Hydroponics GH pH 7.01 Calibration Solution General Hydroponics® Meter Calibration Solutions General Hydroponics™ uses the highest-quality reference solutions, allowing growers to calibrate many popular brands of PH, EC and TDS meters (NaCl scale or the 442 scale). General... MSRP: Now: $7.87 Out of stock Compare Quick view Bluelab | sku: HGC716482 Bluelab PPM pen Bluelab® ppm Pen — Now Bluelab® Conductivity Pen Measures conductivity and temperature. Selectable units for conductivity and temperature. Backlit LCD display with low battery warning. Successful calibration indicator and calibration is... MSRP: Now: $118.80 Add to Cart Compare Quick view Bluelab | sku: HGC716050 Bluelab Original Truncheon PPM EC TDS Bluelab Original Truncheon® Nutrient Meter With its super tough, high-quality, fully waterproof design, no calibration required, daylight readable blue LEDs and no on/off buttons to worry about, the Bluelab Truncheon® Nutrient Meter has proven... MSRP: Now: $178.80 Add to Cart Compare Quick view General Hydroponics GH pH 4.01 Calibration Solution General Hydroponics® Meter Calibration Solutions General Hydroponics™ uses the highest-quality reference solutions, allowing growers to calibrate many popular brands of PH, EC and TDS meters (NaCl scale or the 442 scale). General... MSRP: Now: $7.76 Choose Options Compare Quick view Bluelab | sku: HGC716336 Bluelab Guardian Monitor Bluelab® Guardian Monitor Adjustable brightness display. Large easy-to-read, plant-safe green LED displays. Selectable values for conductivity and temperature. Simple push button pH calibration system. No calibration required for conductivity and... MSRP: Now: $506.13 Add to Cart Compare Quick view sku: LL01825 Luster Leaf Digital Soil Moisture Meter Product Details Digital results from 3.5 to 9.0. Instructions and plant pH preference list included. MSRP: Now: $23.02 Out of stock Compare Quick view TrolMaster | sku: AMP-2 Aqua-X Sensor Board Overview: AMP-2 Sensor Board is specially designed for Aqua-X Irrigation Control System. With a male-to-male signal cable, this unit acts as a bridge between the sensors (pH Sensor & EC/Temp Sensor) and the Aqua-X Controller. The pH level, EC level... MSRP: Now: $147.00 Add to Cart Compare Quick view sku: HI9814 Hanna Groline Combo pH PPM Temp meter HI9814 HI9814 GroLine Waterproof Combo meter uses 1 combo probe to measure pH/EC/PPM/Temp. This combo meter is easily calibrated by using just 1 combo pH/EC/PPM calibration solution. Combo pH, EC, and TDS (ppm) probe design... MSRP: Now: $649.90 Add to Cart Compare Previous 1 2 3 4 5 Next Previous 1 2 3 4 5 Next Compare Selected × OK
Quick view General Hydroponics GH pH 7.01 Calibration Solution General Hydroponics® Meter Calibration Solutions General Hydroponics™ uses the highest-quality reference solutions, allowing growers to calibrate many popular brands of PH, EC and TDS meters (NaCl scale or the 442 scale). General... MSRP: Now: $7.87 Out of stock Compare Quick view Bluelab | sku: HGC716482 Bluelab PPM pen Bluelab® ppm Pen — Now Bluelab® Conductivity Pen Measures conductivity and temperature. Selectable units for conductivity and temperature. Backlit LCD display with low battery warning. Successful calibration indicator and calibration is... MSRP: Now: $118.80 Add to Cart Compare Quick view Bluelab | sku: HGC716050 Bluelab Original Truncheon PPM EC TDS Bluelab Original Truncheon® Nutrient Meter With its super tough, high-quality, fully waterproof design, no calibration required, daylight readable blue LEDs and no on/off buttons to worry about, the Bluelab Truncheon® Nutrient Meter has proven... MSRP: Now: $178.80 Add to Cart Compare Quick view General Hydroponics GH pH 4.01 Calibration Solution General Hydroponics® Meter Calibration Solutions General Hydroponics™ uses the highest-quality reference solutions, allowing growers to calibrate many popular brands of PH, EC and TDS meters (NaCl scale or the 442 scale). General... MSRP: Now: $7.76 Choose Options Compare Quick view Bluelab | sku: HGC716336 Bluelab Guardian Monitor Bluelab® Guardian Monitor Adjustable brightness display. Large easy-to-read, plant-safe green LED displays. Selectable values for conductivity and temperature. Simple push button pH calibration system. No calibration required for conductivity and... MSRP: Now: $506.13 Add to Cart Compare Quick view sku: LL01825 Luster Leaf Digital Soil Moisture Meter Product Details Digital results from 3.5 to 9.0. Instructions and plant pH preference list included. MSRP: Now: $23.02 Out of stock Compare Quick view TrolMaster | sku: AMP-2 Aqua-X Sensor Board Overview: AMP-2 Sensor Board is specially designed for Aqua-X Irrigation Control System. With a male-to-male signal cable, this unit acts as a bridge between the sensors (pH Sensor & EC/Temp Sensor) and the Aqua-X Controller. The pH level, EC level... MSRP: Now: $147.00 Add to Cart Compare Quick view sku: HI9814 Hanna Groline Combo pH PPM Temp meter HI9814 HI9814 GroLine Waterproof Combo meter uses 1 combo probe to measure pH/EC/PPM/Temp. This combo meter is easily calibrated by using just 1 combo pH/EC/PPM calibration solution. Combo pH, EC, and TDS (ppm) probe design... MSRP: Now: $649.90 Add to Cart Compare Previous 1 2 3 4 5 Next Previous 1 2 3 4 5 Next Compare Selected × OK
Quick view Bluelab | sku: HGC716482 Bluelab PPM pen Bluelab® ppm Pen — Now Bluelab® Conductivity Pen Measures conductivity and temperature. Selectable units for conductivity and temperature. Backlit LCD display with low battery warning. Successful calibration indicator and calibration is... MSRP: Now: $118.80 Add to Cart Compare Quick view Bluelab | sku: HGC716050 Bluelab Original Truncheon PPM EC TDS Bluelab Original Truncheon® Nutrient Meter With its super tough, high-quality, fully waterproof design, no calibration required, daylight readable blue LEDs and no on/off buttons to worry about, the Bluelab Truncheon® Nutrient Meter has proven... MSRP: Now: $178.80 Add to Cart Compare Quick view General Hydroponics GH pH 4.01 Calibration Solution General Hydroponics® Meter Calibration Solutions General Hydroponics™ uses the highest-quality reference solutions, allowing growers to calibrate many popular brands of PH, EC and TDS meters (NaCl scale or the 442 scale). General... MSRP: Now: $7.76 Choose Options Compare Quick view Bluelab | sku: HGC716336 Bluelab Guardian Monitor Bluelab® Guardian Monitor Adjustable brightness display. Large easy-to-read, plant-safe green LED displays. Selectable values for conductivity and temperature. Simple push button pH calibration system. No calibration required for conductivity and... MSRP: Now: $506.13 Add to Cart Compare Quick view sku: LL01825 Luster Leaf Digital Soil Moisture Meter Product Details Digital results from 3.5 to 9.0. Instructions and plant pH preference list included. MSRP: Now: $23.02 Out of stock Compare Quick view TrolMaster | sku: AMP-2 Aqua-X Sensor Board Overview: AMP-2 Sensor Board is specially designed for Aqua-X Irrigation Control System. With a male-to-male signal cable, this unit acts as a bridge between the sensors (pH Sensor & EC/Temp Sensor) and the Aqua-X Controller. The pH level, EC level... MSRP: Now: $147.00 Add to Cart Compare Quick view sku: HI9814 Hanna Groline Combo pH PPM Temp meter HI9814 HI9814 GroLine Waterproof Combo meter uses 1 combo probe to measure pH/EC/PPM/Temp. This combo meter is easily calibrated by using just 1 combo pH/EC/PPM calibration solution. Combo pH, EC, and TDS (ppm) probe design... MSRP: Now: $649.90 Add to Cart Compare Previous 1 2 3 4 5 Next Previous 1 2 3 4 5 Next Compare Selected × OK
Quick view Bluelab | sku: HGC716050 Bluelab Original Truncheon PPM EC TDS Bluelab Original Truncheon® Nutrient Meter With its super tough, high-quality, fully waterproof design, no calibration required, daylight readable blue LEDs and no on/off buttons to worry about, the Bluelab Truncheon® Nutrient Meter has proven... MSRP: Now: $178.80 Add to Cart Compare Quick view General Hydroponics GH pH 4.01 Calibration Solution General Hydroponics® Meter Calibration Solutions General Hydroponics™ uses the highest-quality reference solutions, allowing growers to calibrate many popular brands of PH, EC and TDS meters (NaCl scale or the 442 scale). General... MSRP: Now: $7.76 Choose Options Compare Quick view Bluelab | sku: HGC716336 Bluelab Guardian Monitor Bluelab® Guardian Monitor Adjustable brightness display. Large easy-to-read, plant-safe green LED displays. Selectable values for conductivity and temperature. Simple push button pH calibration system. No calibration required for conductivity and... MSRP: Now: $506.13 Add to Cart Compare Quick view sku: LL01825 Luster Leaf Digital Soil Moisture Meter Product Details Digital results from 3.5 to 9.0. Instructions and plant pH preference list included. MSRP: Now: $23.02 Out of stock Compare Quick view TrolMaster | sku: AMP-2 Aqua-X Sensor Board Overview: AMP-2 Sensor Board is specially designed for Aqua-X Irrigation Control System. With a male-to-male signal cable, this unit acts as a bridge between the sensors (pH Sensor & EC/Temp Sensor) and the Aqua-X Controller. The pH level, EC level... MSRP: Now: $147.00 Add to Cart Compare Quick view sku: HI9814 Hanna Groline Combo pH PPM Temp meter HI9814 HI9814 GroLine Waterproof Combo meter uses 1 combo probe to measure pH/EC/PPM/Temp. This combo meter is easily calibrated by using just 1 combo pH/EC/PPM calibration solution. Combo pH, EC, and TDS (ppm) probe design... MSRP: Now: $649.90 Add to Cart Compare Previous 1 2 3 4 5 Next Previous 1 2 3 4 5 Next Compare Selected × OK
Quick view General Hydroponics GH pH 4.01 Calibration Solution General Hydroponics® Meter Calibration Solutions General Hydroponics™ uses the highest-quality reference solutions, allowing growers to calibrate many popular brands of PH, EC and TDS meters (NaCl scale or the 442 scale). General... MSRP: Now: $7.76 Choose Options Compare Quick view Bluelab | sku: HGC716336 Bluelab Guardian Monitor Bluelab® Guardian Monitor Adjustable brightness display. Large easy-to-read, plant-safe green LED displays. Selectable values for conductivity and temperature. Simple push button pH calibration system. No calibration required for conductivity and... MSRP: Now: $506.13 Add to Cart Compare Quick view sku: LL01825 Luster Leaf Digital Soil Moisture Meter Product Details Digital results from 3.5 to 9.0. Instructions and plant pH preference list included. MSRP: Now: $23.02 Out of stock Compare Quick view TrolMaster | sku: AMP-2 Aqua-X Sensor Board Overview: AMP-2 Sensor Board is specially designed for Aqua-X Irrigation Control System. With a male-to-male signal cable, this unit acts as a bridge between the sensors (pH Sensor & EC/Temp Sensor) and the Aqua-X Controller. The pH level, EC level... MSRP: Now: $147.00 Add to Cart Compare Quick view sku: HI9814 Hanna Groline Combo pH PPM Temp meter HI9814 HI9814 GroLine Waterproof Combo meter uses 1 combo probe to measure pH/EC/PPM/Temp. This combo meter is easily calibrated by using just 1 combo pH/EC/PPM calibration solution. Combo pH, EC, and TDS (ppm) probe design... MSRP: Now: $649.90 Add to Cart Compare Previous 1 2 3 4 5 Next Previous 1 2 3 4 5 Next Compare Selected × OK
Quick view Bluelab | sku: HGC716336 Bluelab Guardian Monitor Bluelab® Guardian Monitor Adjustable brightness display. Large easy-to-read, plant-safe green LED displays. Selectable values for conductivity and temperature. Simple push button pH calibration system. No calibration required for conductivity and... MSRP: Now: $506.13 Add to Cart Compare Quick view sku: LL01825 Luster Leaf Digital Soil Moisture Meter Product Details Digital results from 3.5 to 9.0. Instructions and plant pH preference list included. MSRP: Now: $23.02 Out of stock Compare Quick view TrolMaster | sku: AMP-2 Aqua-X Sensor Board Overview: AMP-2 Sensor Board is specially designed for Aqua-X Irrigation Control System. With a male-to-male signal cable, this unit acts as a bridge between the sensors (pH Sensor & EC/Temp Sensor) and the Aqua-X Controller. The pH level, EC level... MSRP: Now: $147.00 Add to Cart Compare Quick view sku: HI9814 Hanna Groline Combo pH PPM Temp meter HI9814 HI9814 GroLine Waterproof Combo meter uses 1 combo probe to measure pH/EC/PPM/Temp. This combo meter is easily calibrated by using just 1 combo pH/EC/PPM calibration solution. Combo pH, EC, and TDS (ppm) probe design... MSRP: Now: $649.90 Add to Cart Compare Previous 1 2 3 4 5 Next Previous 1 2 3 4 5 Next Compare Selected × OK
Quick view sku: LL01825 Luster Leaf Digital Soil Moisture Meter Product Details Digital results from 3.5 to 9.0. Instructions and plant pH preference list included. MSRP: Now: $23.02 Out of stock Compare Quick view TrolMaster | sku: AMP-2 Aqua-X Sensor Board Overview: AMP-2 Sensor Board is specially designed for Aqua-X Irrigation Control System. With a male-to-male signal cable, this unit acts as a bridge between the sensors (pH Sensor & EC/Temp Sensor) and the Aqua-X Controller. The pH level, EC level... MSRP: Now: $147.00 Add to Cart Compare Quick view sku: HI9814 Hanna Groline Combo pH PPM Temp meter HI9814 HI9814 GroLine Waterproof Combo meter uses 1 combo probe to measure pH/EC/PPM/Temp. This combo meter is easily calibrated by using just 1 combo pH/EC/PPM calibration solution. Combo pH, EC, and TDS (ppm) probe design... MSRP: Now: $649.90 Add to Cart Compare Previous 1 2 3 4 5 Next Previous 1 2 3 4 5 Next Compare Selected × OK
Quick view TrolMaster | sku: AMP-2 Aqua-X Sensor Board Overview: AMP-2 Sensor Board is specially designed for Aqua-X Irrigation Control System. With a male-to-male signal cable, this unit acts as a bridge between the sensors (pH Sensor & EC/Temp Sensor) and the Aqua-X Controller. The pH level, EC level... MSRP: Now: $147.00 Add to Cart Compare Quick view sku: HI9814 Hanna Groline Combo pH PPM Temp meter HI9814 HI9814 GroLine Waterproof Combo meter uses 1 combo probe to measure pH/EC/PPM/Temp. This combo meter is easily calibrated by using just 1 combo pH/EC/PPM calibration solution. Combo pH, EC, and TDS (ppm) probe design... MSRP: Now: $649.90 Add to Cart Compare Previous 1 2 3 4 5 Next Previous 1 2 3 4 5 Next Compare Selected
Quick view sku: HI9814 Hanna Groline Combo pH PPM Temp meter HI9814 HI9814 GroLine Waterproof Combo meter uses 1 combo probe to measure pH/EC/PPM/Temp. This combo meter is easily calibrated by using just 1 combo pH/EC/PPM calibration solution. Combo pH, EC, and TDS (ppm) probe design... MSRP: Now: $649.90 Add to Cart Compare Previous 1 2 3 4 5 Next Previous 1 2 3 4 5 Next Compare Selected