HM Digital COM-100 Waterproof EC TDS Temp Combo Meter

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The COM-100 is a professional grade level EC/TDS/Temp meter ideal for all water quality testing, hydroponics, water purification applications, wastewater regulation, aquaculture, labs & scientific testing, pools & spas, ecology testing, boilers & cooling towers, water treatment and more.

  • Measures electrical conductivity (EC), total dissolved solids (TDS), salinity and temperature.
  • UPGRADED: Four scales: µS, mS, ppm 0.5 (NaCl) Scale & 0.7 (442™) Scale
  • Automatic Temperature Compensation (ATC) using three temperature coefficients
  • Waterproof housing (IP-67 rating)
  • Digital Calibration (push button) to any point within the meter’s range
  • Auto-off function, data-hold function and low-battery indicator
  • Display: large and easy-to-read LCD screen includes simultaneous temperature reading.
  • Replaceable Sensor (model SP-C1)
  • Factory Calibrated: The COM-100 meter is calibrated with a 1413 µS solution.
  • UPGRADED: Includes translucent cap, 2 (AAA) batteries and lanyard.

Introducing the COM-100: Your Professional Grade EC/TDS/Temp Meter for Precision Water Testing and More!

The COM-100 is the ultimate solution for all your water quality testing needs, from hydroponics and water purification to aquaculture and scientific labs. This versatile meter measures electrical conductivity (EC), total dissolved solids (TDS), salinity, and temperature with utmost accuracy and efficiency.

Key Features:

  • Measure EC, TDS, salinity, and temperature effortlessly.
  • UPGRADED: Now includes four scales - µS, mS, ppm 0.5 (NaCl) Scale & 0.7 (442™) Scale.
  • Automatic Temperature Compensation (ATC) with three temperature coefficients for precise readings.
  • Durable and waterproof housing with an impressive IP-67 rating.
  • Convenient Digital Calibration (push button) to any point within the meter's range.
  • Auto-off function, data-hold function, and low-battery indicator for hassle-free operation.
  • Large and easy-to-read LCD screen with simultaneous temperature display.
  • Replaceable Sensor (model SP-C1) for long-term usability.
  • Factory Calibrated with a 1413 µS solution for accurate measurements.
  • UPGRADED: Includes translucent cap, 2 (AAA) batteries, and lanyard for enhanced portability.


  • EC Range: 0 – 9990 µS; 0 – 9.99 mS
  • TDS Range: 0 – 8560 ppm (0.7 Scale); 0 – 8.56 ppt (0.7 Scale) / 0 – 5000 ppm (0.5 Scale); 0-8.56 ppt (0.5 Scale)
  • Temperature Range: 0-55 °C; 32-130°F
  • Resolution: 0-99: 0.1 µS/ppm/ 0.01mS/ppt; 100-999: 1 µS/ppm; 1000-9990: 10 µS/ppm. Temp. resolution is 0.1 °C/F
  • Accuracy: +/- 2%
  • EC to TDS Conversion Factor: Non-linear conversions for KCl, 442TM, or NaCl solutions, selected by the user.
  • Probe: Detachable platinum electrodes
  • Housing: IP-67 Waterproof (submersible; floats)
  • UPGRADED: Power source: 2 x Triple A (AAA) included
  • Dimensions: 18.5 x 3.4 x 3.4 cm (7.3 x 1.3 x 1.3 Inches)
  • Weight: 90.7g (3.2 oz)
  • UPC: 891144000007

Invest in the COM-100 today and experience unmatched accuracy and reliability in water testing. Whether you're a hydroponics enthusiast, a water treatment professional, or a pool and spa owner, this meter will be your indispensable companion for all water quality assessments. Upgrade your water testing capabilities with the COM-100 now!

Please note that "442" is a registered trademark of the Myron L Company.

More Information
GTIN 891144000007
Manufacturer HM Digital
Weight 0.100000
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