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DANOPLUS Waterproof Digital Pen Type Multiparameter Water Quality Tester Kit 6-in-1 (pH ORP TDS Salinity Conductivity EC Temperature Meter) with Replaceable

7 in 1 Water Quality Monitor WiFi PH Meter ABS Automatic

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6 in 1 Water Quality Tester Tuya WiFi Multi-Parameter Water Quality Monitor Digital PH Dissolved Solids/EC/SG/Salt/Temp Meter