This device is designed to capture measurements of the environment and soil, it is also protected against external phenomena (dust, water, etc, ..).
The soil moisture sensor consists of two electrodes that function as a capacitor with the surrounding soil. The sensor circuit detects changes in water content and relates them to the moisture content of the soil.
Electrical conductivity is measured with a pair of carbon ink electrodes in contact with the soil solution. Temperature is measured with a thermistor encapsulated in the sensor trim.
Electroconductivity: This sensor also has temperature, humidity and luminosity built into the board.
Voltage -> 3 V
Working temperature -> -50 to 85 ºC
Range of soil temperature readings -> -50 to 85 ºC
Precision in soil temperature -> + – 0.6 ºC
Soil moisture reading range -> 0 to 100%
Accuracy in soil moisture -> + – 3%
Electroconductivity reading range -> 0 to 10 mS / cm
Electroconductivity Accuracy -> + -2%
Oscillator frequency -> 80 MHz