Filters Fast Logo Header
Free Shipping on orders over $75 | FREE 365-DAY RETURNS

Product Availability

Please provide your e-mail address below to receive a notification when this product becomes available:


Thanks! We'll send you a notification when this product is available!


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 4 to 5 business days.
Home Filter Club

Sign up for the Home Filter Club in checkout. You choose how often you want your filter, and we take care of the rest. Home Filter Club
Purchasing for a Business?

Contact [email protected] to gain access to case quantity discounts, account management and terms! Home Business Services

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