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QC-1 Quick Check TDS/Conductivity Monitor

Item will ship in 5 days.

Price $20.30
More Information
Manufacturer HM Digital

HM Digital QC-1 - Quick Check TDS/Conductivity Monitor


  • With the push of a button, the unit displays a green or red light, indicating good water quality or service required, respectively.
  • Tests for TDS or conductivity levels.
  • Eight programmable set points (by dip switch).
  • Bright LED lights.
  • Simple to use.
  • Factory Calibrated to 100 ppm NaCl. Re-calibration is unncessary.
  • Comes equipped with  Mur-lok® Quick-Connect T-fitting (1/4 inch standard, also available in 3/8" or 1/2" ).
  • Excellent Reverse Osmosis (RO) or Deionization (DI) monitor
  • Installs quickly and easily.



TDS/EC Range: 0-5000 ppm (10,000 µS)
Max. Set Point: 50 ppm (100 µS)
Accuracy: ±3%
Cable Length: 24.5" (including sensor)
Fittings: 1/4"
Power source: 4 x 1.5V button cell batteries (389-A) (included)
Battery life: Approx. one year
Size: 7.6 x 2 x 4.7 cm (3 x .8 x 1.9 in.)
Weight: 39.7 g (1.4 oz.) (not including sensor)


If the TDS level is above the set-point, the red light will illuminate, indicated service is required. If the TDS level of the product water is below the set-point, the green light will indicate the filter is good