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SPECIFIC DETAILS: The real-time measurement method is adopted, that is, the dual measurement displays the PH value from 0.00 to 14.00 and the ORP

PH-803W PH ORP Controller Digital pH Meter Acidity Alkalinity Controller Water Quality Monitor(US Plug 110V)

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WiFi Digital PH Meter 2 In 1 PH&ORP Controller BNC Replaceable Probe Water Quality Tester for Hydroponics, Aquarium 110V/220V

Digital PH ORP Redox 2 in 1 Controller Monitor w/ Output Power Relay Control, El PH-803

PH Tester Durable Acid Meter Swimming Pool Temperature Monitor With Backlight, Plug Type: EU Plug

YIERYI Digital Temp CL ORP EC TDS PH Meter, Bluetooth Water Quality Te – Yieryi

YIERYI Digital Temp CL ORP EC TDS PH Meter, Bluetooth Water Quality Te – Yieryi

PH-803W PH ORP Controller Digital pH Meter Acidity Alkalinity Controller Water Quality Monitor(US Plug 110V) : Industrial & Scientific

YIERYI Digital Temp CL ORP EC TDS PH Meter, Bluetooth Water Quality Te – Yieryi

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High-precision PH-803W WiFi Monitoring Digital Acid-base Redox Controller PH Meter ORP Meter - AliExpress