Product description: Material: ABSSize: 15.5*3.1 cmTemperature range: 0-55 degrees CelsiusMonitoring range: 0-9990ppm/s/cmTest items: TDS value, conductivity, Celsius/Fahrenheitcolor: blueQuantity: 1 piecePackage content: 1*water quality test pen1. QUICK MEASUREMENT: The measuring device is able to measure the electrical conductivity of the water (EC). The number of dissolved solids TDS (Total Dissolved Solids) can also be determined from this value.2. THREE DIFFERENT MODES: Switch between outputting the results in TDS (ppm) or EC (s) at the push of a button. In addition, the device is able to indicate the temperature of the measured liquid in Celsius or Fahrenheit.3. ACCURATE MEASUREMENTS: The TDS EC measuring device measures the conductivity (EC) from 0-9990 s / cm and the TDS value from 0-9990 ppm, resolution: 1 s / ppm from 0-999, 10 s / ppm from 1000-9990. The accuracy of the measuring device is 2%. Long battery life and low power consumption; automatic shutdown function can save battery consumption4. IMMEDIATELY READY FOR USE: Our conductivity meter is already pre-calibrated at the factory. After switching on, you can start measuring straight away. Recalibration is possible at any time using the screw on the back of the device. Saves money and protects your health at the same time; The home water test kit will alert you when it is time to change filters to remove contaminants from your water.5. LOCK READING RECORDING CONVENIENT: Lock reading for easy recording; The large, easy-to-read LCD screen and data storage function enable reading and recording. The bright display makes it much easier to use the conductivity meter, especially in the dark or in strong light.