Name: HM Digital COM-80 EC/TDS HydroTester – 4-Scale Water Quality Meter with ATC
Brand: HM Digital
SKU: 50006
Price: 36.99 USD
Availability: InStock

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