Check the listing for details. s HM Digital COM-80 Hydrotester TDS/EC/Temperature Meter. Condition: New. Listed at 19.94 USD. HM Digital Waterproof COM-80 EC/TDS HydroTester *** Check out more TDS Meters/Testers (Click Here) *** Check out more HM Digital Products (Click Here) - Waterproof Rating: IP-65. Do not drop the meter into water since it is not rated to the IP-67 rating. FEATURES: Measures electrical conductivity (EC), total dissolved solids (TDS). Exellent 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. Need help deciding which meter is right for you? View our TDS/EC Meter Selection Guide. SPECIFICATIONS: EC Range: 0 - 9990 µS; 0 - 9.9 mS TDS Range: 0 - 5000 ppm (mg/L); 0 - 5.0 ppt Temperature Range: 1-80 °C; 33-176 °F Resolution: 1 µS/ppm; 0.1 mS/ppt. Temp. resolution: 0.1 °C/F Accuracy: +/- 2% EC-to-TDS Conversion Factor: NaCl (avg of 0.5). Calibration: Digital calibration by push button. Probe: Fixed Housing: Water resistant Power source: 3 x 1.5V button cell batteries (included) (model LR44 or equivalent) Dimensions: 15.3 x 3.2 x 1.8 cm (6.0 x 1.3 x 0.7 inches) Weight: 53.9g (1.9 oz)