VIVOSUN Digital pH and TDS Meter Kits, 0.01pH High Accuracy Pen Type pH Meter ± 2% Readout Accuracy 3-in-1 TDS EC Temperature Meter for Hydroponics, Pool and Aquarium, Yellow Blue, UL Certified

$13.99

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AC Infinity Hydroponic Meter PRO Kit, High Precision Digital pH Pen with ±0.01 pH Accuracy and Interchangeable Probe, All-in-One Temp Salinity EC TDS pH Meter, Water Hydroponic Gardens Aquariums Pools

$102.81

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VIVOSUN 5-in-1 Digital PH Meter with PH/Salinity/TDS/EC/Temperature Function, Backlight Screen, IP67 Waterproof for Hydroponics, Home Drinking, Pool and Aquarium

$32.99

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VIVOSUN TDS Tester 3-in-1 TDS EC & Temperature Meter Ultrahigh Accuracy Digital Water Quality TDS Tester (Blue)

$9.99

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VIVOSUN 4-in-1 Digital pH Meter with pH/TDS/EC/Temp Function, 0-14.0 pH Measurement Range, ±0.1 pH Accuracy Water Quality Tester for Hydroponics, Household Drinking, and Aquarium

$27.99

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VIVOSUN PH Meter Digital PH Tester Pen 0.01 High Accuracy Water Quality Tester with 0-14 PH Measurement Range for Household Drinking, Pool and Aquarium, with ATC, Army Green

$13.99

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Hanna Instruments HI98128 pHep 5pH/Temperature Tester, 6-25/64" Length x 1-19/32" Width x 1" Height

$130

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VIVOSUN Digital pH Meter, 0.01pH High Accuracy Pen Type pH Tester for Hydroponics, Household Drinking, Pool and Aquarium, UL Certified

$7.99

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APERA INSTRUMENTS AI209-T Value Series PH20 pH Tester Combo Kit, including the Maintenance Set, and a CalPod Solution Holder for Easy Calibration

$88.39

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5 in 1 PH Meter Gomass 0.01 High Accuracy ph Tester Digital for Water TDS/EC/Salt/Temp/PH Pen, PPM Meter Water Tester Drinking Water, Hydroponics, Plants, Aquarium and Pool

$25.99

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AC Infinity pH Meter Kit, High Precision Digital pH Pen with ±0.1 pH Accuracy, Nutrient Test pH Meter for Water Hydroponics Plants, Gardening, Aquariums, Swimming Pools

$59.99

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VIVOSUN Digital pH and TDS Meter Kits, 0.01pH High Accuracy Pen Type pH Meter ± 2% Readout Accuracy 3-in-1 TDS EC Temperature Meter for Hydroponics, Pool and Aquarium, Black White, UL Certified

$18.99

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Digital pH Meter Tester Pen With 3 Calibration Powders, 0.01 Accuracy, Pocket Size, LCD Display for Household Drinking, Pool and Aquarium

$20.59

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Hanna Instruments HI98129 Meter, pH/EC/TDS/Temp, 10" Height, 11" Wide, 20" Length

$209.99

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Milwaukee MW802 LED Economy Portable pH/EC/TDS Meter with 1 Point Manual Calibration, 0.0 to 14.0 pH, +/-0.1 pH Accuracy, +/-0.2 pH Resolution

$234.99

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Digital 4-in-1 pH/EC/TDS/Temp Meter - High Accuracy Pool & Drinking Water Tester

$25

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Apera Instruments Value Series PH850 Portable Handheld pH Meter Kit (AI5510)

$269.1

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HANNA Instruments HI98127 pHep4 pH-Temperature Tester

$121.99

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Hanna Instruments HI98103 Checker pH Tester with Replaceable Electrode for Plant Germination

$43.99

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HMDPHM80 Digital pH/Temperature Meter

$28.99

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