The Soil Moisture Sensor with its two long probes offers an optimal result and is ideal for e.g. an automatic irrigation system. The two large exposed pads act as probes for the sensor and serve as a variable resistor. The more water there is in the soil, the better the conductivity between the pads, this leads to a lower resistance and a higher voltage at the output. - compatible with Arduino - compatible with Raspberry Pi only in combination with art. no. RPI ADC (see accessories) - Analogue sensor - very long sensors - based on earth resistance measurement - 3.3/5 V Power supply - 0 - 4.2 V Output voltage signal - 0 - 35 mA Current - 4 pin JST connector Connections - 1st GND: Ground - 2nd VCC: Voltage - 3rd NC: (not connected) - 4th SIG: Signal Dimensions L x W x H: 82 x 20 x 10 mm https://elecena.pl/product/18280175/sen-moisture-arduino-moisture-sensor-for-soil-moisture 2021-05-02 https://elecena.pl/product/18280175/sen-moisture-arduino-moisture-sensor-for-soil-moisture 2024-06-24