The meter has two measurement modes, between which you can switch at will: TDS – measurement of dissolved substances in water in units of ppm (parts per million) and temperature in units of °C Electrical conductivity in units of μs/cm Function: Automatic shutdown after 5 minutes of inactivity to save battery. Measurement range: 0-9990 ppm (parts per million) The device is not waterproof, insert only the measuring part into the liquid. To switch between TDS and electrical conductivity measurement: If you want to determine the conductivity of a liquid, immerse the instrument in the liquid and press the SHIFT key. Now the device measures the electrical conductivity of the liquid. Press the SHIFT button again to switch the measurement mode back to TDS measurement. Dimenions 16 x 3.5 x 2.5 (LxWxH)
