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YFDGD Water Tester 7 In 1 PH TDS EC ORP Seawater Specific Gravity Salinity Temperature Meter Water Quality Monitor Multipurpose Accurate Easy(Backlight)
YFDGD Water Tester 7In1 Water Quality Tester Multi-function EC/TDS/CF/pH/ORP/Humidity/TEMP Meter With RS485 TO USB 24 Hours Online Monitor Multipurpose Accurate Easy
