$18 · Xiaomi Mi TDS Water Testing Pen

Mi TDS Pen - is an indispensable, easy to manage and very useful device for the systematic monitoring of water quality. Test your water at home, in order to ensure that the necessary Mi Water Purifier. Externally, the device is similar to an electronic thermometer. But except for the temperature, it is able to measure the water content of heavy metals, organic materials, and water salinity estimate its overall purity.