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.
• 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)

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.