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Milwaukee MC811US MAX pH/EC/Temp Monitor
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Combined pH, EC and temperature meter for water hydroponic system
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Multiparameter PH/EC/CF/TDS/Water Quality Tester Temperature Tool for Aquariums, Hydroponics, Laboratory Tool: Amazon.com: Industrial & Scientific
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HI9813-6 Portable pH / EC / TDS / Temp Meter - QA Supplies
