HM Digital COM-100 Water Quality Tester
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HM Digital COM-100 Water Quality Tester


Retail: $70.99 /ea
You Save: 16%
As low as
Retail: $70.99
You Save: 16%
Ships in 5 to 6 business days.

The HM Digital COM-100 Water Quality Tester is a combination electrical conductivity meter, TDS meter, and temperature reader all in one! This waterproof device is ideal for a wide variety of applications including scientific testing, ecology testing, water treatment and much much more.

The COM-100 EC/TDS/Temp Combo Meter Features:

  • Measures Electrical Conductivity, Total Disolved Solids, and Temperature
  • Three different Calibration options KCl, 442, and NaCl
  • Automatic Temperature Compensation (ATC)
  • Waterproof Housing
  • Digital Calibration push button, no screwdriver required
  • Auto-off Function to conserve battery power
  • Data-Hold Function
  • Low-Battery Indicator
  • Large, Easy-to-read LCD screen
  • Factory Calibrated

The HM Digital COM-100 Water Tester Specifications:

  • EC Range: 0-9990 US
    TDS Range: 0-8560 ppm
  • Temp Range: 0-80 Celcius / 32-176 Farenheit
  • Accuracy: plus or minus 2%
  • EC to TDS Conversion Factor: Non-linear conversions for KCl, 442TM or NaCl solutions, set by the user
  • Probe: Detachable platinum electrodes
  • Housing: Waterproof (submersible)
  • Power Source: 3 x 1.5V button cell batteries
  • Dimensions: 18.5 x 3.4 x 3.4 cm or 7.3 x 1.3 x 1.3 inches
  • Weight: 3.2 oz

The COM100 includes a cap, batteries, and lanyard.

Customer Reviews:

Total Reviews: 1 Average Rating: 5 / 5.0

Filtersfast Reviews on Trust Pilot external site

A very nice tool to check the purified water vending machines located throughout the area. I buy water at water vending machines and I have always wondered if the owners maintain, and service the filters and purification machines. With this tester, I am able to quickly test the water and decide if I want to buy more water from a particular water vending machine. I have found most of the water vending machines to be in the TDS range of 9.3 ppm to 23 ppm range, but I have found some of the vending machines to be extremely high in the 100 ppm to 220 ppm. My home water is in the 100 ppm range. This tool is cool. I do wish that the test selection button was located near the top because it presentlhy is located down low, and I have trouble reaching it while testing water in a glass. I also wish the probe sensors would reach 1 inch lower. But it is still an effective water testing tool.

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