Hydrologic DM-2 Industrial Dual TDS MonitorMeasure and control the TDS levels of water easily before and after RO unit with Hydrologic DM 2 Industrial Dual TDS Monitor. The highly accurate readings from the digital display screen help you identify when the RO system needs replacement. This digital device is perfect to use for commercial, industrial, and residential RO systems. Auto On Off The device shuts down automatically after twenty seconds to save battery power. Factory Calibrated: All
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