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GroLine Hydroponics Waterproof Portable pH/EC/TDS/Temperature Meter - HI9814
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Combined pH, EC and temperature meter for water hydroponic system
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Hanna GroLine Waterproof Portable pH/EC/TDS Temperature Meter for Hydroponics
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YIERYI WiFi PH EC Meter 3-in-1 Water Quality Tester Conductivity Contr – Yieryi
3 in 1 pH / EC / Temperature Meter ATC Waterproof Pen Type Tester – Gain Express
Bluelab Guardian Monitor | Bluelab New Zealand
Professional EC/Temp/PH Meter Hydroponics Nutrient Tester Water Quality Conductivity Acidity Analyzer for Aquaculture Aquariums
GroLine Hydroponics Waterproof Portable pH/EC/TDS/Temperature Meter - HI9814
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Ph Meter, 0.01 Resolution High Accuracy Digital Ph Tester With Atc: 4 In 1 Ph Tds Temperature Meter For Drinking Water, Hydroponics, Lab, Aquarium - Walmart.com
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pH and TDS Meter Combo TDS EC Temperature Meter for Hydroponics, Household Drink | eBay