1The highquality highpurity platinum sensor is designed to ensure accurate and stable measurement values within the full range. Compact size, portable, light weight and easy to carry around, convenient to use. 2Automatic calibration function, you only need to enter the known conductivity value in the instrument and immerse the sensor in the calibration solution, press the ENTER key, the instrument will automatically calibrate. 3It has a simple measurement value lock function. In the conductivity measurement mode, press the HOLD key, the instrument will automatically lock the current measurement value, and press the key again, and the instrument will return to the measurement mode. 4Save power, with automatic shutdown program. When the instrument is turned on, it will enter the measurement state. If you do not operate any keys for a long time, the instrument will automatically turn off the power. 5It has good waterproof performance, and each structural connection point of the instrument has been waterproofed, even if it is placed in water, it will not affect the use. At the same time, the weight of the instrument is calculated by the suspension force, and it can float by itself when immersed in water.Item Type: TDS/EC MeterMaterial: ABSColor: As shown in the pictureWeight: Approx.70g/2.5ozBattery: CR2032 button battery 230mAh (included)TDS Detection Range: 0-4999ppmEC: 0-9999sError: 2%Temperature Detection Range: 0-99 (32-212)Error: 2Backlight: TDS1 x TDS/EC Meter1 x Instruction Manual1 x Pack CoverMonitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.