Milwaukee CD97 Digital Low Range TDS Pen

SKU: 9139-CD97~ea

Milwaukee CD97 Digital Low Range TDS Pen

SKU: 9139-CD97~ea
Regular price $49.25 CAD
  • Secure payments
Shipping calculated at checkout.

Milwaukee CD97 Digital Low Range TDS Pen

The Milwaukee CD97 Total Dissolved Solids Low Range (PPM) Pen is designed for water conditioning, education and many other applications. The CD97 helps to make sure that filters are kept up-to-date and clean for water filtration.  It is also a cost-effective tool for teacher's science labs.


  • Measures conductivity and temperature with automatic temperature compensation
  • Ideal range for water conditioning (0 to 999 ppm)
  • Units in ppm easily convertible to uS/cm
  • Factory calibrated with the ability to recalibrate if needed
  • Automatic Temperature Compensation (ATC)
  • 300 hours continuous use (4 x 1.5V batteries included)
  • Simple one-point calibration


  • Range: 0 to 999 ppm
  • Resolution: 1 ppm
  • Accuracy: ±10 ppm
  • Calibration: Manual, at 1 point through trimmer
  • Temperature Compensation: Automatic from 5 to 50°C (41 to 122°F), with ß=2%/°C
  • Environment: 0 to 50°C / 32 to 122°F; max RH 100%
  • Battery Type: 4 x 1.5V Alkaline (included)
  • Battery Life: Approx. 300 hours of continuous use
  • Calibration Solution: M10080B (25 sachets 20 mL ea.)
  • Dimensions: 6 x 1.2 x 0.95 inches (180 x 65 x 32 mm)
  • Weight: 3.5 ounces (0.99 g)

Milwaukee CD97 Manual



EC/PPM electrodes can develop nutrient buildup over time. To minimize buildup, always rinse the probe in fresh tap or DI water after every use.


The Milwaukee TDS/PPM Pen, like all TDS meters, provides a reading measured in parts per million of contaminates per unit of volume in a solution.

TDS/PPM is often converted to uS/cm. Different scales include the 500 scale, 650 scale and the 700 scale. 

Your TDS/PPM reading can be approximately converted to uS/cm as shown in the examples below.

1 ppm = 2 uS/cm on the 0.5 factor scale
1 ppm = 1.43 µS/cm on the 442 scale or .70 factor scale

Recently viewed