Check the listing for details. COM-360: Waterproof Professional Series pH/EC/TDS/Temp Meter. Condition: New. Listed at 162.99 USD. The COM-360 is a professional grade level pH/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 Potential Hydrogen (pH), Electrical Conductivity (EC), Total Dissolved Solids (TDS), Salinity and TemperatureFive scales: pH, µS, mS, ppm 0.5 (NaCl) Scale & 0.7 (442™) ScaleAutomatic Temperature Compensation (ATC) using three temperature coefficientsWater resistant housingDigital 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 readingReplaceable Sensor (model SP-CP)Factory Calibrated (pH/EC/TDS)Includes translucent cap, 2 (AAA) alkaline batteries, pH 4 & 7 calibration solutions, pH storage solution and lanyardPRODUCT DESCRIPTIONpH Range: 0 – 14 pHEC Range: 0 – 9990 µS; 0 – 9.99 mSTDS Range: 0 – 8560 ppm (0.7 Scale); 0 – 5000 ppm (0.5 Scale)Temperature Range: 0-55 °C; 32-130°FResolution: 0-99: 0.1 µS/ppm/ 0.01mS ; 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 electrodes & pH glass sensor with reference tube electrodesHousing: Water resistantPower source: 2 x Triple-A (AAA) includedDimensions: 20.0 x 3.4 x 3.4 cm (7.8 x 1.3 x 1.3 inches)Weight:110g (4.0 oz)442 is a registered trademark of the Myron L Company.