The HM Digital CIC-152 holds TDS/EC inside a band rather than under a single ceiling. It has two programmable control points — CP1 (low level) and CP2 (maximum limit) — each driving its own isolated relay, so one unit can run a dosing pump and a dump valve, or two separate systems.
Inside the band the display shows green. Falling to CP1 lights yellow and switches Relay 1; rising to CP2 lights red and switches Relay 2. Typical duties: chemical dosing and injection control, nutrient maintenance, cooling-tower conductivity control and blowdown. Supplied with sensor, sensor cable, power cord, mounting brackets and U.S. plug adapter.
| SKU / Model | CIC-152 |
| Product Type | Panel-mount dual-control-point TDS / EC dosing & injection controller |
| EC Range | 0–9999 µS (µS/cm) |
| TDS Range | CIC-152 (NaCl): 0–4995 ppm · CIC-152-4 (442™): 0–8500 ppm |
| Temperature Range | 1–80 °C (33–176 °F) |
| Resolution | 0–999: 0.1 µS/ppm · 1000–9999: 1 µS/ppm · 0.1 °C/°F |
| Accuracy | ±2% of reading · Thermometer ±0.5 °C |
| Temperature Compensation | Automatic (ATC), 1–60 °C |
| Calibration | Digital push-button, with manual fine-tuning in high ranges |
| Control Points | Two, independently programmable — CP1 low level, CP2 maximum limit |
| Set-Point Relays | Two independent isolated dry contacts — 2 A, max 220 V, resistive load, 100,000 strokes |
| Relay Voltage | 5 V (the connected device requires its own power source) |
| Status Indication | Tri-colour: green in band, yellow at CP1, red at CP2 |
| Alarm | Two independent alarms, user-selectable |
| Probe / Sensor | ½" NPTF bushing — sensor model SP-1-PSC |
| Cable Length | 3 m (9.8 ft) shielded |
| Display | Bright tri-colour LED |
| Power Supply | 110 V / 220 V, ±10% Vac, 50/60 Hz |
| Enclosure | ABS, front and back |
| Operating Environment | 0–50 °C (32–122 °F); RH max 95% non-condensing |
| Dimensions | 7.2 × 7.2 × 11.1 cm (2.8 × 2.8 × 4.4 in) |
| Weight | 241 g (8.5 oz) · 610 g (1 lb 5.5 oz) shipped |
| Factory Calibration | 1413 µS |
| Warranty | 1 Year Limited Warranty |
Specifications transcribed from HM Digital CIC-152 User’s Guide Ver 2.6E (document 230315).
📖 CIC-152 User’s Guide (PDF)Covers installation, the two-control-point programming sequence, calibration, wiring and troubleshooting. Published by HM Digital, Inc.
