The HM Digital COM-80 Hydrotester is easily the most advanced economically priced, reliable EC/TDS meter on the market. With its versatility and durability, it is ideal for testing applications such as hydroponics & gardening, pools & spas, aquariums & reef tanks, water ionizers, drinking water and more.

• Measures electrical conductivity (EC), total dissolved solids (TDS).
• Excellent for nutrient testing.
• Four scales: EC: µS, mS; TDS: ppm, 0.5 (NaCl) & 0.7 (442™)
• Automatic Temperature Compensation (ATC)
• Water resistant
• Digital Calibration (push button) to any point within the meter’s range
• Auto-off function, data-hold function and low-battery indicator
• Display: large and easy-to-read LCD screen includes simultaneous temperature reading.
• Factory Calibrated: The COM-80 meter is calibrated with a 1413 µS solution.
• Includes a protective cap and batteries