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PS-202: Dual Display TDS Controller

PS-202: Dual Display TDS Controller
Controller Sensor A close-up of the detachable sensor
Where to buy: Find a distributor in your region.

The PS-202 allows for continuous and simultaneous monitoring and control of TDS levels on two water lines.

Instruction Manuals


  • Simultaneously monitors and controls the TDS levels of two water lines (e.g., the feed water and product water) for high output commercial systems.
  • Large, bright L.E.D. displays.
  • An alarm will sound if the TDS level rises above the user-set level for both lines.
  • Installs easily in minutes.
  • Includes two 1/2" sensor probes (at no extra cost).


Range: 0 - 999ppm
Accuracy: ±2%
Conversion Factor: NaCl (avg. 0.5)
Resolution: 1 PPM
ATC: Yes (1 - 65 degrees Celsius)
Calibration: Adjustable
Setting: Controlled by on-screen up/down buttons
Relay Control: The unit will open or close a circuit via dry contacts when the ppm level of the output water (line 2) or input water (line 1) reaches or exceeds its control setting (simple switch).  The PS-202 can be used to control one or two pumps, solenoid valves or other device. 
Relay Voltage: 5V
Alarm: Steady beep for both lines
Display: Bright 5/8" L.E.D. dual displays
2 Probes: 1/2" bushing (NPT), 3 meter (9.8 ft) shielded cable
Power supply: AC 110V / AC 220V
Dimensions: 9.4 x 9.4 x 12.5 cm (3.7 x 3.7 x 4.9 in.)
Monitor Weight: 569.8 g (1 lb 4.1 oz)
Total Weight: 938.4 g (2 lbs 1.1 oz)