Electronic water hardness and salinity meter. This tester will be useful in everyday life when checking the purity of drinking water and in other applications (eg. aquaristics or laboratory tests). The device is very easy to use - just remove the cap, immerse the electrodes in the tested water. The built-in LCD display enables accurate and legible measurement of water hardness (its impurities with inorganic compounds) and its temperature. It does not require external power sources (electrical network) and only one CR2032 battery, which makes it extremely mobile and safe in contact with water. Product features: The water hardness meter allows you to check the level of water contamination with inorganic substances. The meter is calibrated in "ppm" - parts per million, which is the world's most popular method of determining the amount of molecules of chemical compounds dissolved in water. The less polluted the water, the lower its electrical conductivity will be. Raw, unfiltered water can show a score as high as 200 PPM or higher. The EC conductivity of water can be considered as an indicator of the salt content, waters containing few ions have low electrical conductivity, while e.g. sea water has a very high conductivity. The commonly used unit of water conductivity is μS/cm ( micro-Siemens/cm). Fresh water or pond water should have a conductivity between 300 and 1200 μS/cm. The tester is characterized by high accuracy of measurements . The measurement result is read on a clear LCD display. You will immediately check whether the water is safe for drinking and other uses. The operation of the tester is fabulously simple - just immerse the electrode in water and the measurement result immediately appears on the reader. Built-in physical function buttons for easy use of the device. The HOLD function saves the measured result and the SHIFT function changes the TDS/EC measurement function Practical case included - protects the device from damage. Specification: Material: plastic Power supply: 1x 3V CR2032 battery It has a HOLD memory function Measures water temperature 0.1 - 80 C Functions: TDS (Total Dissolved Solids - amount of impurities dissolved in water), EC (Water conductivity) TDS reading in the range of 0-9999 ppm EC reading in the range of 0-9999 μS/cm ( micro-Siemens/cm) LCD display Practical case included Dimensions: 154mm x 30mm x 14mm Colour: white User manual in PDF format available for download in the Attachments section