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HM COM-100 TDS + EC Meter

HM COM-100 TDS + EC Professional Meter

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. The COM-100 is a professional level EC/TDS meter at an unbeatable price..

HM COM-100 Features:

  • 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.


HM COM-100 Specifications:

  • 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, 442TM 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: 2X aaa batteries (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)