
HM Digital PSC-150 Extended Range EC/TDS Controller with Alarm & Temperature Display
The HM Digital PSC-150 is an extended range EC/TDS controller designed for monitoring and controlling TDS levels in high-output commercial systems. It features a large LED display, audible alarm for user-set TDS thresholds, and on-screen temperature monitoring.
Key Features:
- Extended range (0-9999 ppm TDS, 0-9999 µS/cm EC)
- Large LED display
- Audible alarm for TDS thresholds
- Temperature display (°C or °F)
- Digital calibration
- Tri-color display for water quality status
Specifications:
- Brand: HM Digital
- Model: PSC-150
- TDS Range: 0-9999 ppm (mg/L)
- EC Range: 0-9999 µS/cm
- Accuracy: ±2%
- Resolution: 0.1 µS/ppm (0-999); 1 µS/ppm (1000-9999)
- Temperature Range: 1-75°C (33-167 °F)
- Power Source: 110V/220V AC
Applications:
- Commercial water treatment systems
- Reverse osmosis (RO) systems
- High-output filtration systems
- Industrial water applications
Kit Contents:
- 1 x HM Digital PSC-150 Controller
- 1 x 1/2" NPT sensor probe
Performance and Characteristics:
- Accurate and reliable monitoring
- Easy to read display
- User-friendly interface
- Comprehensive water quality management
Take control of your water quality with the advanced HM Digital PSC-150 Extended Range EC/TDS Controller! Monitor and maintain optimal water conditions with ease.

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Temperature Range | 1-75°C; 33-167 °F |
Accuracy | +/- 2% |
Conversion Factor | NaCl (avg. 0.5) |
Resolution | 0.1 µS/ppm (0-999); 1 µS/ppm (1000-9999) |
ATC | Yes (1 - 65°C) |
Calibration | Adjustable (manual) |
Setting | Controlled by on-screen up/down buttons |
Relay Control | The unit will open or close a circuit via dry contacts when the ppm/µS level reaches or exceeds the control setting (simple switch). It can be used to control a pump, solenoid valve, or other devices. |
Relay Voltage | 5V |
Alarm | Optional steady beep (set by user) |
Display | Bright 5/8" L.E.D. display |
Probe | 1/2" bushing (NPT), 3 meters (9.8 ft) shielded cable |
Power Source | AC 110V / AC 220V |
Dimensions | 7.2 x 7.2 x 11.1 cm (2.8 x 2.8 x 4 in.) |
Monitor Weight | 230 g (8.1 oz) / Total (Shipping) Weight: 595 g (1 lb 5 oz) |
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