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Homegrown Hydroponics Rochester

Hm Digital Com-80S Hydrotester

Hm Digital Com-80S Hydrotester

Regular price $43.99 USD
Regular price Sale price $43.99 USD
Sale Sold out

he COM-80 is an economically priced, reliable EC/TDS meter that is ideal for testing applications such as hydroponics, gardening, and more.


  • Measures electrical conductivity (EC), total dissolved solids (TDS).  Excellent for hydroponic nutrient testing.
  • Four scales: EC: µS, mS;  TDS: ppm, ppt.
  • Automatic Temperature Compensation (ATC).
  • Water resistant.
  • Measurement Range: 0-9990 µS; 0-5000 ppm; 0-9.9 mS; 0-5.0 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.
  • Factory Calibrated: The COM-80 meter is calibrated with a 1413 µS solution—can be recalibrated with digital calibration using the push buttons.
  • Includes a protective cap and batteries.


  • EC Range: 0-9990 µS; 0-9.9 mS.
  • TDS Range: 0-5000 ppm (mg/L); 0-5.0 ppt.
  • Temperature Range: 1-80°C/33-176°F.
  • Resolution: 1 µS/ppm; 0.1 mS/ppt.
  • Temp. resolution: 0.1°C/F.
  • Accuracy: +/- 2%.
  • EC-to-TDS Conversion Factor: NaCl (avg of 0.5).
  • Calibration: Digital calibration by push button.
  • Probe: Fixed.
  • Housing: Water resistant.
  • Power source: 3 x 1.5V button cell batteries (included)  (model LR44 or equivalent).
  • Dimensions: 15.3 x 3.2 x 1.8 cm (6.0 x 1.3 x 0.7 inches).
  • Weight: 53.9 g (1.9 oz).


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