The Milwaukee CD97 Total Dissolved Solids Low Range (PPM) Pen is designed for water conditioning, education and many other applications. The CD97 helps you make sure that your keep your filters up-to-date and clean for water filtration and is a cost effective tool for teacher's science labs. Keep PPM in your target range to help your achieve better results.
EC/PPM 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.
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