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PM-1: OEM In-Line TDS Purity Monitor

An ideal monitor/alert for water coolers and other enclosed water purification systems. Alerts a user when the filtration system requires service.


  • OEM single line internal TDS monitor that is ideal for enclosed water purification systems.
  • Includes a light and optional alarm that alerts the user service is required when the TDS level reaches the pre-programmed set-point.
  • User-defined set points (any even number between 2 and 200).


Range: 0-200 ppm (mg/L)
Accuracy: +/- 2%
Calibration: Factory calibrated
Alert: Warning light, optional alarm
Light color: Either red or yellow
Light function: Either flashes or is steady
Alarm: Beeps for 20 seconds, then goes silent
Power Source: AC 110V / 220V ±2%
Cable Length: 62.86 cm (24.75")
Fittings: 1/4" standard, also available with 3/8" or 1/2"
Max. Water Pressure: 200 PSIG (at 23°C with a 1/4" fitting)
Circuit Board Dimensions: 8.9 x 6.9 x 3.8 cm (3.5 x 2.7 x 1.5 in.)
Weight: 266.5 g (9.4 oz.)