HM Digital COM-80 EC/TDS HydroTester The HM Digital COM-80 is an economically priced, reliable EC/TDS meter ideal for hydroponics & gardening, pools & spas, aquariums & reef tanks, water ionizers, drinking water testing, and more. With four measurement scales, Automatic Temperature Compensation (ATC), and a water-resistant housing, the COM-80 delivers professional-grade accuracy at an accessible price point. Key Features Measures Electrical Conductivity (EC) and Total Dissolved Solids (TDS) — excellent for nutrient solution testing Four measurement scales: EC: µS, mS | TDS: ppm, ppt Automatic Temperature Compensation (ATC) for accurate readings across varying sample temperatures Water-resistant housing for field and lab use Digital push-button calibration to any point within the meter’s range Auto-off, data-hold, and low-battery indicator functions Large, easy-to-read LCD with simultaneous temperature display Factory calibrated with 1413 µS solution; field-recalibration supported Includes protective cap and batteries (3 × LR44) Measurement Range EC: 0–9990 µS | 0–9.9 mS TDS: 0–5000 ppm (mg/L) | 0–5.0 ppt Temperature: 1–80°C | 33–176°F Technical Specifications Resolution: 1 µS/ppm | 0.1 mS/ppt | 0.1°C/°F Accuracy: ±2% EC-to-TDS Conversion Factor: NaCl (avg. 0.5) Calibration: Digital push-button Probe: Fixed Housing: Water resistant Power: 3 × 1.5V LR44 button cell batteries (included) Dimensions: 15.3 × 3.2 × 1.8 cm (6.0 × 1.3 × 0.7 in) Weight: 53.9 g (1.9 oz) UPC: 891144000229 | SKU: 50006 | Origin: South Korea Applications Hydroponics and aquaponics nutrient monitoring Aquarium and reef tank water quality management Pool and spa water chemistry testing Drinking water and tap water purity verification Water ionizer and RO system performance testing Gardening and soil runoff EC measurement
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