The Gravity: Analog TDS Sensor / Meter for Arduino is a compact, plug-and-play water quality kit designed to measure the Total Dissolved Solids (TDS) level in liquids. Operating between 3.3V and 5.5V, it is fully compatible with Arduino, ESP32, and Raspberry Pi microcontrollers, providing a stable 0–2.3V analog output that represents water purity from 0 to 1000 ppm.
The kit features an anti-polarization AC excitation source that extends the life of the included waterproof probe, making it an ideal choice for smart water testing, hydroponics, aquariums, and water filtration monitoring.
Would you like help with any of the following?
See the exact connection wiring diagram for your microcontrollerLearn how to add temperature compensation for more accurate ppm readingsGet a list of typical TDS values for drinking water, tap water, and RO water
