DFRobot Gravity - analog sensor of TDS, purity of water for Arduino

Analog TDS sensor compatible with Arduino, it is used for measuring the hardness and the purity of water. It can be used to test the quality of water in households, hydroponic farms and others. It measures TDS in the range of 0 ppm to 1000 ppm. It is supplied with the voltage from 3.3 V to 5.5 V.