Capacitive Soil Moisture Sensor for Arduino

Capacitive analog soil moisture sensor. Unlike conventional soil conductivity sensors, it does not have electrical contact with the soil and, accordingly, is not subject to corrosion. High operating frequency reduces the dependence of readings on the salt composition of the soil.

Capacitive humidity sensors are currently most widely used in industrial, meteorological and household equipment due to a number of advantages over resistive and thermal sensors.

These sensors are produced according to capacitive technology, which provides maximum temperature and long-term stability of parameters, high sensitivity, low hysteresis and response time, as well as full recovery of characteristics after exposure to condensate. At the same time, due to the use of modern microelectronic technologies in the production of “put on stream”, the sensors have a very low cost.

The sensor has a simple connection to the Arduino, where the VCC and GND outputs are needed to supply power to the board, and the AOUT pin is used as a transmission line for the received signal.

Supply voltage, V 3.3 ... 5.5
Output voltage, V 0 ... 3
Output type analogue
Module dimensions, mm 98 x 23