HM Digital EC 3 Pen

HM Digital EC-3 Electrical Conductivity Water Quality Tester Thermometer With Case. Therefore Ideal for all water purification applications, wastewater regulation, aquaculture, hydroponics, and colloidal silver. Perfect for both consumer or commercial use. Carry one in your pocket or toolbox at all times. If you are out travelling, this water quality tester is of great help. You can instantly check whether the water is pure or not. Purity of water is of utmost importance when you are away from home. It comes with a case, you can easily carry it along with you wherever you go. How it works is, the water quality tester measure the level of EC, ( EC = Electrical Conductivity) lower the EC purer the water with 0 µS being pure H2O.

HM Digital EC-3 Electrical Conductivity Water Quality Tester Thermometer With Case Features:

  • Ideal for commercial use. Includes a carrying case with belt clip.
  • Highly efficient and accurate due to its advanced microprocessor technology.
  • Hold Function: saves measurements for convenient reading and recording.
  • Auto-off function: the meter shuts off automatically after 10 minutes of non-use to conserve batteries.
  • Measurement Range: 0-9990 µS. From 0-999 µS, the resolution is in increments of 1 µS. From 1000 to 9990 µS, the resolution is in increments of 10 µS, indicated by a blinking x10 image.
  • Built-in digital thermometer
  • Display: large and easy-to-read LCD screen.
  • Factory Calibrated: HM Digital EC-3 meter has been factory calibrated to a 1413 µS KCl solution. Meters can be recalibrated with a mini-screwdriver.

The COM-80 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.


  • Hydroponics and Gardening
  • Aquariums and Reefs
  • Pools and Spas
  • Water Treatment
  • Drinking Water
  • Much More!