HM Digital pH/Temperature Meter

HM Digital TDS-EZ Water Quality TDS Tester, 0-9990 ppm Measurement Range , 1 ppm Resolution, +/- 3% Readout Accuracy

Digital Pocket PH Water Meter Tester For Aquarium Pool Spa Wine Hydroponics Test

General Hydroponics GH1514 Ph Control Kit

KLTECH Portable Digital LCD PH Meter Tester Monitor Auto Pen Test Water Soil Pool Hydroponic Type PH-2011

HM Digital TDS-3 Handheld TDS Meter With Carrying Case, 0 - 9990 ppm TDS Measurement Range, 1 ppm Resolution, +/- 2% Readout Accuracy

Oakton EcoTestr pH 2 Waterproof pH Tester, 0.0 to 14.0 pH Range

HM Digital TDS-4TM Meter with Digital Thermometer

BestDealUSA 3in1 Plant Flowers Soil Tester Moisture Light PH Meter

HM Digital TDS-4 Pocket Size TDS Tester Meter Without Digital Thermometer, 0-9990 ppm Measurement Range , 1 ppm Resolution, +/- 2% Readout Accuracy

NuoYa001 Electric Pocket Digital PH Meter Tester Hydroponics Pen Aquarium Pool Water Test

LCD Digital PH Meter Tester Aquarium Pool Water Hydroponic School laboratory

HDE Digital Ph Meter + TDS Tester Aquarium Water Quality Pool Hydroponic Monitor

uP Based Conductivity Meter

HM Digital PH-80 pH HydroTester, 0-14.0 pH Range, 1 pH Resolution, +/- 0.2 pH Readout Accuracy. Pet Supplies / Shops

HM Digital HMDPH200 Waterproof PH And Amp Temperature Meter

6 in 1 Water testing Meter - ph ppm temp tds ec cf

HM Digital HMDCOM100 Waterproof EC/TDS And Amp Temperature Combo Meter

Precision 6-in-1 Reader LCD Digital Monitor Water Testing Meter Multitester Temperature °C °F pH TDS EC CF PPM w/ Probes Adapter Handle Case Portable for Pool Lab

Hanna Instruments HI 98107 pHep pH Tester, with +/-0.1 Accuracy

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