HM Digital - COM-80 EC/TDS Hydrotester

The HM Digital COM-80 Meter is a high-accuracy combo meter designed to measure electrical conductivity (EC), total dissolved solids (TDS), and temperature-all in one compact, user-friendly unit. With its water-resistant housing and dual-range EC/TDS measurement capability, the COM-80 delivers precise readings for nutrient solutions, hydroponic systems, and general water quality testing.

It features automatic temperature compensation (ATC), a bright digital LCD screen, and selectable measurement scales (EC: µS/cm or TDS: ppm) for customized readings. This meter is trusted by hobbyists and commercial growers alike for maintaining consistent, balanced nutrient levels.

Key Features:

• Measures EC (µS/cm), TDS (ppm), and temperature (°C/°F)

• Dual-range: 0-9990 µS / 0-5000 ppm

• Water-resistant design with digital LCD

• Automatic temperature compensation (ATC)

• Replaceable sensor and calibration function