HM Digital Pro Series Pen style pH/TDS/EC/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, µS, 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 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
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 µS; 0 – 9.99 mS
TDS Range: 0 – 8560 ppm (0.7 Scale); 0 – 5000 ppm (0.5 Scale)
Temperature Range: 0-55 °C; 32-130°F
Resolution:
pH: 0.1pH
EC 0 – 999 : 1µS ; 1000 – 9990 : µS ; 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)