Milwaukee CD600 Digital Total Dissolved Solids Pen (TDS)

SKU: 9139-CD600~ea

Milwaukee CD600 Digital Total Dissolved Solids Pen (TDS)

SKU: 9139-CD600~ea
Regular price $49.25 CAD
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Milwaukee CD600 Digital Total Dissolved Solids Pen (TDS)

The Milwaukee CD600 Total Dissolved Solids (TDS) Pen is designed for hydroponics, aquariums, horticulture, water conditioning and many other applications. The CD600 helps to make sure that plants are receiving the right amount of nutrients.  It also helps to keep filters up-to-date and clean for water filtration.


  • Measures Total Dissolved (TDS) direct and with automatic temperature compensation
  • Ideal range for hydroponics (0 to 1990 ppm)
  • Units in ppm easily convertible to uS/cm
  • Factory calibrated with the ability to recalibrate if needed
  • Automatic Temperature Compensation (ATC)
  • 350 hours continuous use (4 x 1.5V batteries included)
  • Simple one-point calibration


  • Range: 0 to 1990 ppm
  • Resolution: 10 ppm
  • Accuracy: ±2% Full Scale
  • Typical EMC Deviation: ±2% Full Scale
  • Calibration: Manual, at 1 point through trimmer
  • Temperature Compensation: Automatic from 5 to 50°C, 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. 350 hours of continuous use
  • Calibration Solution: M10032B (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 CD600 Manual



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


The Milwaukee TDS Pen, like all TDS meters, provides a measure of Total Dissolved Solids (ppm) reading 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 readings 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

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