HM Digital QC-1 Quick Check Monitor

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HM Digital QC-1 Quick Check Monitor

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  • HM Digital QC-1 Quick Check Monitor
  • HM Digital QC-1 Quick Check Monitor


HM Digital QC-1 Quick Check 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% 
  • ATC: No 
  • 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)

Quick Overview

Press the "Push-to-Check" button for an instant water quality check!

Additional Information

Manufacturer HM Digital