HM Digital COM-80 Pen Style TDS/EC/Temp Meter

Check Nutrient Strength and Water Temperature in One Dip - Pen Style

Guessing at nutrient concentration leads to feeding mistakes in hydroponic systems. This meter reads electrical conductivity (EC), total dissolved solids (TDS) and temperature together, so you can confirm your solution before it reaches the plants. Automatic Temperature Compensation (ATC) adjusts readings for water temperature, and the unit is calibrated at the factory with a 1413 µS solution.

Sold as a single meter, it suits home gardeners who want one reliable tester for a reservoir, and it is equally practical as a spare handheld for a regular indoor grower or a commercial team that wants a meter at every station.

Key Features & Benefits

• EC, TDS and temperature in one pen — one tool covers the checks most nutrient routines need.
• Automatic Temperature Compensation — readings stay consistent as water temperature changes.
• Water resistant body — it tolerates the splashes common around reservoirs.
• Factory calibrated to 1413 µS — it is ready to use out of the box.
• Protective cap and batteries included — you can start testing right away.

Who Should Use HM Digital COM-80

Growers running hydroponic systems, recirculating reservoirs or nutrient mixes in vegetative growth and flowering will find it useful. It also works for general water checks.

About HM Digital COM-80

HM Digital makes water quality meters. The COM-80 is a pen style TDS/EC/Temp meter sold each, with a protective cap and batteries in the box.

Frequently Asked Questions

Q: What does the COM-80 measure?
A: It measures electrical conductivity, total dissolved solids and water temperature. Temperature shows alongside the reading.

Q: What is EC?
A: EC is electrical conductivity, a measure of how well water carries current. In a nutrient solution it indicates how much dissolved salt is present.

Q: What is ATC?
A: ATC stands for Automatic Temperature Compensation. The meter corrects conductivity readings for the water temperature, so results are easier to compare.

Q: Is it ready to use?
A: Yes. It is factory calibrated with a 1413 µS solution, and batteries are included.

Q: Can I use it near water?
A: It is water resistant, so splashes are fine. Keep the protective cap on when you are not testing.