The COM-80 is an economically priced, reliable EC/TDS meter that is ideal for testing applications such as hydroponics & gardening, pools & spas, aquariums & reef tanks, water ionizers, drinking water and more. Features: Measures electrical conductivity (EC), total dissolved solids (TDS). Excellent for nutrient testing. Four scales: EC:,"_µS, mS; TDS: ppm, ppt Automatic Temperature Compensation (ATC) Water resistant Measurement Range: 0-9990,"_µS; 0-5000 ppm; 0-9.9 mS; 0-5.0 ppt Digital Calibration (push button) to any point within the meter's range Auto-off function, data-hold function and low-battery indicator Display: large and easy-to-read LCD screen includes simultaneous temperature reading. Factory Calibrated: The COM-80 meter is calibrated with a 1413,"_µS solution. The meter can be recalibrated with digital calibration using the push buttons. Includes a protective cap and batteries. Tech Specs Brand HM Digital SKU HGC716145 Weight (lb.) 0.15 Height (in.) 7.4 Prop 65 No Lead Time Due to social distancing requirements, this item ships in 7-10 business days Length (in.) 1.7 Width (in.) 2 Warranty 1 Year UPC 891144000229 UL Listed No