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HM Digital Waterproof EC/TDS/Temp Combo Meter

Item #: 716160

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HM Digital
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The COM-100 is a professional level EC/TDS meter at an unbeatable price.
Ideal for all water quality testing, water purification applications, wastewater regulation, aquaculture, hydroponics, colloidal silver, 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.
  • Four scales:,"_µS, mS, ppm, ppt (mS and ppt are new)
  • Three different non-linear EC-to-TDS conversion factors (KCl, 442TM, NaCl).
  • Automatic Temperature Compensation (ATC) using three temperature coefficients
  • Waterproof housing (IP-67 rating)
  • Measurement Range: 0-9990,"_µS; 0-8560 ppm; 0-9.99 mS; 0-8.56 ppt
  • 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. The meter can be recalibrated with digital calibration using the push buttons, rather than a screwdriver.
  • Includes a cap, batteries and lanyard.
  • EC Range: 0 - 9990,"_µS; 0 - 9.99 mS
  • TDS Range: 0 - 8560 ppm (mg/L); 0 - 8.56 ppt
  • Temperature Range: 0-80 C; 32-176 F
  • Resolution: 0-99: 0.1,"_µS/ppm/mS/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, 442 or NaCl solutions, selected by the user.
  • Calibration: Digital calibration by push button.
  • Probe: Detachable platinum electrodes
  • Housing: IP-67 Waterproof (submersible; floats)
  • Power source: 3 x 1.5V button cell batteries (included) (model LR44 or equivalent)
  • 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)


Brand HM Digital
SKU 716160
Weight (lb.) 0.38
Height (in.) 2.9
Length (in.) 8.9
Width (in.) 2.1
Warranty Yes
Free Shipping Yes

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