HM Digital COM-80 EC/TDS/Temp Waterproof Hydro Tester

Waterproof Meter for Testing Conductivity and Dissolved Solids

The COM-80 is an economically priced, reliable EC/TDS meter for hydroponics, gardening, pools, spas, aquariums, water ionizers, and drinking water testing.

It measures electrical conductivity and total dissolved solids, with automatic temperature compensation and a water resistant housing.

Digital calibration by push button lets you calibrate to any point within the meter's range, and the large LCD display shows temperature alongside your reading.

Key Features & Benefits

• EC and TDS measurement — four scales: µS, mS, ppm, ppt
• Automatic temperature compensation — adjusts readings as water temperature changes
• Water resistant housing — holds up in wet testing environments
• Digital push-button calibration — calibrate to any point in range

Who Should Use This Meter

Growers and hobbyists testing EC and TDS in hydroponic systems, pools, aquariums, or drinking water.

Calibration and Display

The COM-80 is factory calibrated with a 1413 µS solution and can be recalibrated digitally using the push buttons; the large LCD shows temperature alongside your EC/TDS reading.

Frequently Asked Questions

What does the COM-80 measure?

Electrical conductivity (EC) and total dissolved solids (TDS).

Is this meter waterproof?

It is water resistant, suitable for testing applications around water.

How is it calibrated?

By digital push-button calibration, recalibrated to any point within its range.

Does it include batteries?

Yes, it includes a protective cap and batteries.