Soil Moisture Sensor (with Screw Terminals) can be used to measure the moisture in the soil and similar materials. This easy-to-use soil moisture sensor has two large, exposed pads that function as probes for the sensor, together acting as a variable resistor. The more water in the soil, the better the conductivity between the pads. This results in a lower resistance and a higher SIG out. The sensor includes a 3-pin screw pin terminal pre-soldered to the board for easy wiring and setup.
Connect the VCC and GND pins to an Arduino-based device (or compatible development board) to get the SparkFun Soil Moisture Sensor functioning. You will receive a SIG out, which will depend on the amount of water in the soil. One commonly known issue with soil moisture senors is their short lifespan when exposed to a moist environment. To combat this, SparkFun had the PCB coated in gold finishing (ENIG, or Electroless Nickel Immersion Gold).
FEATURES
- Easy-to-use
- 3-pin screw pin terminal is pre-soldered to the board
- PCB coated in gold finishing
- 3.3V to 5V operating supply voltage range
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