Digital. Simple. Compact.

The Milwaukee CD601 Digital Conductivity (EC) Pen is designed for aquariums, aquaculture, pools, water conditioning and many other applications. 

For aquariums, the CD601 helps you make sure that your water has the right amount of nutrient to help keep fish tanks healthy. For water filtration, this pen helps to make sure your filters are up-to-date and clean. Keeping EC in your target range helps to achieve better results.

Design Features

• Measures microSiemens (µS/cm) direct
• Ideal range for aquariums (0 to 1990 µS/cm)
• Units in µS/cm are easily convertible to (ppm)
• Simple one-point calibration
• Factory calibrated with the ability to recalibrate if needed
• Automatic Temperature Compensation (ATC)
• Battery life of approx. 300 hours of continuous use

Care and Use

Maintenance

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

Converting EC to TDS

The Milwaukee EC Pen, like all conductivity meters, provides a measure of electrically charged ions in a solution and is an absolute measure of conductivity.

EC is often converted to TDS in parts per million (ppm). Different scales include the 500 scale, 650 scale and the 700 scale. However, true PPM can only be determined through chemical analysis.

Your mS/cm reading can be approximately converted to TDS (ppm) as shown in the examples below.

2,000 µS/cm = 2.0 mS/cm = 1000 ppm on .50 factor scale
2,000 µS/cm = 2.0 mS/cm = 1400 ppm on the 442 scale or .70 factor scale

Thank you for considering Milwaukee to help you take your results to the next level.