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ORP Pen Tester – Waterproof, Portable & Auto-Calibrating for Water Disinfection
Replaceable ORP Electrode Probe – High-Accuracy Sensor with BNC Connector
6-in-1 Pen-Type Water Quality Tester – pH, ORP, TDS, EC, Salinity & Temperature
GX-E2 Detachable pH Electrode – Heavy-Duty Probe with 3m BNC Cable
pH Electrode Probe BNC Connector 200cm
Water Quality Real-time Continuous Monitoring
Replaceable ORP REDOX Electrode 50 OHM BNC Type
Replacement pH Electrode with Calibration Powder
0-14 pH Electrode Probe BNC Connector
Digital Rechargeable DO Meter
Professional Digital Large LCD Dissolved Oxygen DO Meter Tester
Pentype TDS / Salinity / Temperature Tester Water Quality Meter with ATC
Salinity & Temp Meter, Pen Type Salt Water Quality
