HM Digital Pen style TDS/EC/Temp meter

COM-80: EC/TDS HydroTester Series The COM-80 is easily the most advanced economically priced, reliable EC/TDS meter on the market. With its versatility and durability, it 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, 0.5 (NaCl) & 0.7 (442™) Automatic Temperature Compensation (ATC) Water resistant 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. Includes a protective cap and batteries Specifications EC Range: 0 – 9990 µS; 0 – 9.9 mS TDS Range: 0 – 5000 ppm (0.5 Scale) ; 0-8560 ppm (0.7 Scale) Temperature Range: 1-80 °C; 33-176 °F Resolution: 1 µS/ppm; 0.1 mS Temp. Resolution: 0.1 °C/F Accuracy: +/- 2% Power source: 3 x 1.5V button cell batteries (LR44 or equivalent is included) 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)