HM Digital Pro Series Pen style pH/TDS/EC/Temp meter

COM-300: Waterproof Professional Series pH/EC/TDS/Temp Meter The COM-300 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), and Temperature Five scales: pH, S, mS, ppm 0.5 (NaCl) Scale & 0.7 (442) Scale Automatic Temperature Compensation (ATC) using three temperature coefficients Waterproof housing (IP-67 rating) Digital Calibration (push button) to any point within the meters range Auto-off function, data-hold function and low-battery indicator Display: large and easy-to-read LCD screen includes simultaneous temperature reading Replaceable Sensor (model SP-C3) Factory Calibrated (pH/EC/TDS) Includes translucent cap, 2 (AAA) alkaline batteries, pH 4 & 7 calibration solutions, pH storage solution and lanyard Specifications pH Range: 0 14 pH EC Range: 0 9990 S; 0 9.99 mS TDS Range: 0 8560 ppm (0.7 Scale); 0 5000 ppm (0.5 Scale) Temperature Range: 0-55 C; 32-130F Resolution: pH: 0.1pH EC 0 999 : 1S ; 1000 9990 : S ; 0- 9.99 mS :0.01 mS TDS 0 999 : 1ppm / 1000 9990: 10 ppm Temperature 0.1 C/F Accuracy: +/- 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 electrodes Housing: IP-67 Waterproof (submersible; floats) Power source: 2 x Triple A (AAA) included Dimensions: 18.5 x 3.4 x 3.4 cm (7.3 x 1.3 x 1.3 inches) Weight: 101.5g (3.6 oz)