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HM Digital Monitors
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HM Digital LDM-100R: Commercial Grade EC/TDS % Rejection Monitor
The HM Digital LDM-100R is a commercial-grade dual-line TDS/EC monitor designed to measure both feed water (input) and product water (output) of your reverse osmosis system — and automatically calculate the % TDS rejection rate .
Ideal for commercial RO systems, water treatment facilities, and laboratory water quality monitoring.
Features
Monitor the efficiency of your commercial RO system in real time
Dual-line TDS/EC display shows feed water (Line 1) and product water (Line 2)
Automatically calculates and displays % TDS rejection
Extended ~2-year battery life for continuous, uninterrupted monitoring
Includes two 1/2" NPT threaded sensor probes and batteries
Specifications
Range: 0–9999 ppm (mg/L); 0–10.0 ppt (g/L); EC: 0–9999 µS; 0–20.00 mS
Accuracy: ±2%
Resolution: 0–99.9: 0.1 ppm/µS; 100–9999: 1 ppm/µS
ATC: Yes (1–65°C)
Calibration: Digital, to any point
Sensor: 1/2" NPT threaded
Sensor Cable: 3 m (9.8 ft.)
Power Source: 2 × 1.5V AA batteries
Battery Life: Approx. 2 years
Dimensions: 12 × 7.5 × 2.6 cm (4.7 × 3 × 1 in)
Weight: 198 g (7 oz.)
