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pH Powder Calibration Solution 4.01 7.00 10.01 pH set

pH Powder Calibration Solution 4.01 7.00 10.01 pH set - Gain Express pH Powder Calibration Solution 4.01 7.00 10.01 pH set - Gain Express

pH Powder Calibration Solution 4.01 7.00 10.01 pH set

$18.90 USD

PC-104 pH CL2 Chlorine Level Meter Water Quality Tester Monitor

PC - 104 pH CL2 Chlorine Level Meter Water Quality Tester Monitor - Gain Express PC - 104 PC - 104 pH CL2 Chlorine Level Meter Water Quality Tester Monitor - Gain Express

PC-104 pH CL2 Chlorine Level Meter Water Quality Tester Monitor

ORP-8651 3-in-1 Heavy Duty pH, mV & Temperature Meter w/ auto buffer recognition

ORP - 8651 3 - in - 1 Heavy Duty pH, mV & Temperature Meter w/ auto buffer recognition - Gain Express ORP - 8651 3 - in - 1 Heavy Duty pH, mV & Temperature Meter w/ auto buffer recognition - Gain Express
-5%

ORP-8651 3-in-1 Heavy Duty pH, mV & Temperature Meter w/ auto buffer recognition

ORP-1696 ±1999mV ORP REDOX Meter + Electrode Water Quality Tester Laboratory Aquarium Pool

ORP - 1696 ORP - 1696 ±1999mV ORP REDOX Meter + Electrode Water Quality Tester Laboratory Aquarium Pool - Gain Express ORP - 1696 ORP - 1696 ±1999mV ORP REDOX Meter + Electrode Water Quality Tester Laboratory Aquarium Pool - Gain Express

ORP-1696 ±1999mV ORP REDOX Meter + Electrode Water Quality Tester Laboratory Aquarium Pool

ORP-1692 0-1000mV ORP REDOX METER TESTER DURABLE ACCURATE

ORP - 1692 ORP - 1692 0 - 1000mV ORP REDOX METER TESTER DURABLE ACCURATE - Gain Express ORP - 1692 ORP - 1692 0 - 1000mV ORP REDOX METER TESTER DURABLE ACCURATE - Gain Express

ORP-1692 0-1000mV ORP REDOX METER TESTER DURABLE ACCURATE

GX-ORP2 Replaceable ORP REDOX Electrode 0~±1999 mV for ORP Meter 300cm

GX - ORP2 Replaceable ORP REDOX Electrode 0~±1999 mV for ORP Meter 300cm - Gain Express GX - ORP2 Replaceable ORP REDOX Electrode 0~±1999 mV for ORP Meter 300cm - Gain Express

GX-ORP2 Replaceable ORP REDOX Electrode 0~±1999 mV for ORP Meter 300cm

$42.90 USD

ORP-1 ORP Redox Electrode, BNC Type Connector Replacement Probe for Tester Meter Monitor Controller Oxidation Reduction Potential Check, 14cm Long 1.2cm Diameter 300cm Extra Long Cable

ORP - 1 ORP - 1 ORP Redox Electrode, BNC Type Connector Replacement Probe for Tester Meter Monitor Controller Oxidation Reduction Potential Check, 14cm Long 1.2cm Diameter 300cm Extra Long Cable - Gain Express ORP - 1 ORP - 1 ORP Redox Electrode, BNC Type Connector Replacement Probe for Tester Meter Monitor Controller Oxidation Reduction Potential Check, 14cm Long 1.2cm Diameter 300cm Extra Long Cable - Gain Express

ORP-1 ORP Redox Electrode, BNC Type Connector Replacement Probe for Tester Meter Monitor Controller Oxidation Reduction Potential Check, 14cm Long 1.2cm Diameter 300cm Extra Long Cable

$39.90 USD

GX-E2 pH Electrode + 3m Cable + BNC Type Plug

GX - E2 pH Electrode + 3m Cable + BNC Type Plug - Gain Express GX - E2 pH Electrode + 3m Cable + BNC Type Plug - Gain Express

GX-E2 pH Electrode + 3m Cable + BNC Type Plug

$28.90 USD

GX-E1 Single Cylinder pH Electrode + Long Cable + BNC Type Plug + 2 Buffer Solutions

GX - E1 GX - E1 Single Cylinder pH Electrode + Long Cable + BNC Type Plug + 2 Buffer Solutions - Gain Express GX - E1 GX - E1 Single Cylinder pH Electrode + Long Cable + BNC Type Plug + 2 Buffer Solutions - Gain Express

GX-E1 Single Cylinder pH Electrode + Long Cable + BNC Type Plug + 2 Buffer Solutions

ECS-23852 0.4 - 4.4EC EC/ppm/CF Nutra-wand / Hydroponic Meter Stick

Gain Express ECS-23852 0.4 - 4.4EC EC/ppm/CF Nutra-wand / Hydroponic Meter Stick Gain Express ECS-23852 0.4 - 4.4EC EC/ppm/CF Nutra-wand / Hydroponic Meter Stick

ECS-23852 0.4 - 4.4EC EC/ppm/CF Nutra-wand / Hydroponic Meter Stick

$43.90 USD

EC-1385 3-in-1 Digital EC / CF / TDS Meter Combo Water Quality Tester IP65 Waterproof Conductivity with ATC Aquarium, Hydroponic, Laboratories, Environmental Monitoring Test Tool Kit

EC - 1385 EC - 1385 3 - in - 1 Digital EC / CF / TDS Meter Combo Water Quality Tester IP65 Waterproof Conductivity with ATC Aquarium, Hydroponic, Laboratories, Environmental Monitoring Test Tool Kit - Gain Express EC - 1385 EC - 1385 3 - in - 1 Digital EC / CF / TDS Meter Combo Water Quality Tester IP65 Waterproof Conductivity with ATC Aquarium, Hydroponic, Laboratories, Environmental Monitoring Test Tool Kit - Gain Express

EC-1385 3-in-1 Digital EC / CF / TDS Meter Combo Water Quality Tester IP65 Waterproof Conductivity with ATC Aquarium, Hydroponic, Laboratories, Environmental Monitoring Test Tool Kit

EC-1383 Pen Type EC / Hydroponics / Nutrient Meter (0~19.99ms/cm)

EC - 1383 EC - 1383 Pen Type EC / Hydroponics / Nutrient Meter (0~19.99ms/cm) - Gain Express EC - 1383 EC - 1383 Pen Type EC / Hydroponics / Nutrient Meter (0~19.99ms/cm) - Gain Express

EC-1383 Pen Type EC / Hydroponics / Nutrient Meter (0~19.99ms/cm)

E-2627 PH Probe with BNC Connector, 150cm Long Cable 0-14pH Test Sensor Electrode for PH Meter Monitor Controller, Replacement Kit for Aquarium Hydroponics Plant Pool Spa

E - 2627 E - 2627 PH Probe with BNC Connector, 150cm Long Cable 0 - 14pH Test Sensor Electrode for PH Meter Monitor Controller, Replacement Kit for Aquarium Hydroponics Plant Pool Spa - Gain Express E - 2627 E - 2627 PH Probe with BNC Connector, 150cm Long Cable 0 - 14pH Test Sensor Electrode for PH Meter Monitor Controller, Replacement Kit for Aquarium Hydroponics Plant Pool Spa - Gain Express

E-2627 PH Probe with BNC Connector, 150cm Long Cable 0-14pH Test Sensor Electrode for PH Meter Monitor Controller, Replacement Kit for Aquarium Hydroponics Plant Pool Spa

E-1325M 0-14 pH Electrode Probe BNC Connector, 300cm Cable for PH Meter Monitor Controller Test Sensor, Replacement Kit for Aquarium Hydroponics Plant Pool Spa

E - 1325M E - 1325M 0 - 14 pH Electrode Probe BNC Connector, 300cm Cable for PH Meter Monitor Controller Test Sensor, Replacement Kit for Aquarium Hydroponics Plant Pool Spa - Gain Express E - 1325M E - 1325M 0 - 14 pH Electrode Probe BNC Connector, 300cm Cable for PH Meter Monitor Controller Test Sensor, Replacement Kit for Aquarium Hydroponics Plant Pool Spa - Gain Express

E-1325M 0-14 pH Electrode Probe BNC Connector, 300cm Cable for PH Meter Monitor Controller Test Sensor, Replacement Kit for Aquarium Hydroponics Plant Pool Spa

$28.90 USD

869-0 Professional pH Temperature Meter Tester °C /°F ±0.05pH High Accuracy Portable Water Quality Device

869 - 0 869 - 0 Professional pH Temperature Meter Tester °C /°F ±0.05pH High Accuracy Portable Water Quality Device - Gain Express 869 - 0 869 - 0 Professional pH Temperature Meter Tester °C /°F ±0.05pH High Accuracy Portable Water Quality Device - Gain Express

869-0 Professional pH Temperature Meter Tester °C /°F ±0.05pH High Accuracy Portable Water Quality Device

868-9 Waterproof Digital pH Meter Tester Thermometer °C °F Replaceable Electrode Pentype Design

868 - 9 868 - 9 Waterproof Digital pH Meter Tester Thermometer °C °F Replaceable Electrode Pentype Design - Gain Express 868 - 9 868 - 9 Waterproof Digital pH Meter Tester Thermometer °C °F Replaceable Electrode Pentype Design - Gain Express

868-9 Waterproof Digital pH Meter Tester Thermometer °C °F Replaceable Electrode Pentype Design

8403 Professional Digital Large LCD Dissolved Oxygen DO Meter Tester Handheld Water Quality Tester with Temperature Measurement

8403 8403 Professional Digital Large LCD Dissolved Oxygen DO Meter Tester Handheld Water Quality Tester with Temperature Measurement - Gain Express 8403 8403 Professional Digital Large LCD Dissolved Oxygen DO Meter Tester Handheld Water Quality Tester with Temperature Measurement - Gain Express

8403 Professional Digital Large LCD Dissolved Oxygen DO Meter Tester Handheld Water Quality Tester with Temperature Measurement

$212.90 USD

837-1 Salinity & Temp Meter, Pen Type Salt Water Quality Tester ATC NaCl 0~70 ppt, Handheld Measurement Monitor Tester, for Saltwater, Hydroponics, Pool, Aquarium, Fish Pond, Spa, Monitoring & Testing

837 - 1 Salinity & Temp Meter, Pen Type Salt Water Quality Tester ATC NaCl 0~70 ppt, Handheld Measurement Monitor Tester, for Saltwater, Hydroponics, Pool, Aquarium, Fish Pond, Spa, Monitoring & Testing - Gain Express 837 - 1 Salinity & Temp Meter, Pen Type Salt Water Quality Tester ATC NaCl 0~70 ppt, Handheld Measurement Monitor Tester, for Saltwater, Hydroponics, Pool, Aquarium, Fish Pond, Spa, Monitoring & Testing - Gain Express

837-1 Salinity & Temp Meter, Pen Type Salt Water Quality Tester ATC NaCl 0~70 ppt, Handheld Measurement Monitor Tester, for Saltwater, Hydroponics, Pool, Aquarium, Fish Pond, Spa, Monitoring & Testing

836-1 Digital Conductivity TDS Meter, ppm ppt uS mS °C/°F Pentype Water Quality Tester with ATC

836 - 1 836 - 1 Digital Conductivity TDS Meter, ppm ppt uS mS °C/°F Pentype Water Quality Tester with ATC - Gain Express 836 - 1 836 - 1 Digital Conductivity TDS Meter, ppm ppt uS mS °C/°F Pentype Water Quality Tester with ATC - Gain Express

836-1 Digital Conductivity TDS Meter, ppm ppt uS mS °C/°F Pentype Water Quality Tester with ATC

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