Check the listing for details. HM Digital COM 100 Waterproof EC/TDS & Temperature Combo Meter- 2023 MODEL. Condition: New. Listed at 72.50 USD. HM Digital COM-100 HMDCOM100 Waterproof EC/TDS And Amp Temperature Combo Meter, 2.1&quot x 2.9&quot x 8.9&quot, White/Purple2023 MODEL & FREE SHIPPING - UPGRADED: Four scales The COM-100 is a professional grade level EC/TDS/Temp meter ideal for all water quality testing, hydroponics, water purification applications, wastewater regulation, aquaculture, colloidal silver, labs & scientific testing, pools & spas, ecology testing, boilers & cooling towers, water treatment and more.Features Measures electrical conductivity (EC), total dissolved solids (TDS), and temperature.UPGRADED: Four scales: µS, mS, ppm 0.5 (NaCl) Scale & 0.7 (442™) ScaleAutomatic Temperature Compensation (ATC) using three temperature coefficientsWaterproof housing (IP-67 rating)Digital Calibration (push button) to any point within the meter’s rangeAuto-off function, data-hold function and low-battery indicatorDisplay: large and easy-to-read LCD screen includes simultaneous temperature reading.Replaceable Sensor (model SP-C1)Factory Calibrated: The COM-100 meter is calibrated with a 1413 µS solution.UPGRADED: Includes translucent cap, 2 (AAA) batteries and lanyard.SpecificationsEC Range: 0 – 9990 µS; 0 – 9.99 mSTDS Range: 0 – 8560 ppm (0.7 Scale); 0 – 8.56 ppt (0.7 Scale)0 – 5000 ppm (0.5 Scale); 0-5.00 ppt (0.5 Scale)Temperature Range: 0-55 °C; 32-130°FResolution: 0-99: 0.1 µS/ppm/ 0.01mS/ppt; 100-999: 1 µS/ppm; 1000-9990: 10 µS/ppm. Temp. resolution is 0.1 °C/FAccuracy: +/- 2%EC to TDS Conversion Factor: Non-linear conversions for KCl, 442TM or NaCl solutions, selected by the user.Probe: Detachable platinum electrodesHousing: IP-67 Waterproof (submersible; floats)UPGRADED: Power source: 2 x Triple A (AAA) includedDimensions: 18.5 x 3.4 x 3.4 cm (7.3 x 1.3 x 1.3 inches)Weight: 127g (4.5 oz)