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HM Digital

HM Digital Extended Range EC/TDS Mini Controller

Part Number: PSC-50
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Introducing the PSC-50 TDS/EC Controller, your solution for precise water quality management. With its intuitive features and robust specifications, this controller ensures optimal control over Total Dissolved Solids (TDS) and Electrical Conductivity (EC) levels in water systems. Here's what sets it apart:


  • Large LED Display: Provides clear visibility of readings and settings.
  • 4-20mA Output Signal: Connects seamlessly to PLC systems for efficient data recording.
  • Alarm Functionality: Alerts users when TDS/EC levels exceed pre-set thresholds.
  • Relay Control: Activates devices based on user-defined set points.
  • Temperature Display: Shows water temperature in Celsius or Fahrenheit on-screen.
  • Includes Sensor Probe: Comes with one SP-1-PSC sensor probe for immediate use.


  • EC Range: 0-9999 µS / 0-20.00 mS
  • TDS Range: 0 – 5000 ppm / 0-10.00 ppt
  • Accuracy: ±2% of reading
  • Conversion Factor: NaCl (avg. 0.5)
  • Resolution: 0.1 (0-99.9); 1 (100-9999); 0.01 (mS & ppt)
  • Automatic Temperature Compensation (ATC): Yes (1 – 60°C)
  • Calibration: Digital via push buttons
  • Set-Point: Easily adjustable via on-screen up/down buttons
  • Relay Voltage: 5V
  • Alarm Options: Customizable steady beep
  • Display: Bright 2.3" LED
  • Cable Length: 3 meters (9.8 ft) shielded cable
  • Power Source: AC 110V / AC 220V
  • Dimensions: 9.6 x 4.8 x 10 cm (3.8 x 1.9 x 3.9 in.)
  • Weight: 261 g (9.2 oz)

Ensure precise control over water quality with the PSC-50 TDS/EC Controller, your reliable partner for maintaining optimal TDS/EC levels in water systems.

California residents Prop 65 Warning
This product contains materials known to the State of California to cause cancer and birth defects or other reproductive harm. www.p65warnings.ca.gov