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Pen Type Salinity Temp Meter Probe Sensor Tester Monitor Measurement Checker ATC for Water Quality Pond Pool Aquarium Saltwater Seawater Drinking Water sold2026 super long standby may savePen Type Salinity Temp Meter Probe Sensor Tester Monitor Measurement Checker ATC for Water Quality Pond Pool Aquarium Saltwater Seawater Drinking Water Product Features 3 in 1 meter! Measure total dissolved solids, salinity, and temperature of water sample with just one device. Functions: Large LCD double reading display with temperature compensation function; P65 waterproof shell; wide range of measurement and a variety of measurement units can be