HM Digital COM-80 Electrical Conductivity (EC) and Total Dissolved Solids Hydro r, 0-5000 ppm TDS Range, 1 ppm Resolution, 2% Readout Accuracy

Product Description: NEW! The COM-80 is an economically priced, reliable EC/TDS meter (ppm pen / nutrient r) that is ideal for testing applications such as hydroponics & gardening, pools & spas, aquariums & reef tanks, water ionizers, drinking water and more.Also great for commercial applications, such as boilers and cooling towers and filtration and purification systems.'