A soil moisture sensor (or meter) measures the water content in soil. With it, you can easily tell when the soil needs more water or when it’s over-watered.
The Soil Moisture Sensor uses capacitance to measure the water content of soil (by measuring the dielectric permittivity of the soil, which is a function of the water content). Simply insert this rugged sensor into the soil to be tested, and the volumetric water content of the soil is reported in percent.
1). Adjustable sensitivity by adjusting the digital potentiometer (shown in blue)
2). Operating voltage: 3.3V ~ 5V
3). Dual output mode, analog output more accurate.
4). A fixed bolt hole for easy installation
5). Panel PCB Dimension: 30mm * 16mm
6). Soil Probe Dimension: 60mm * 30mm
7). With power indicator (red) and digital switching output indicator (green)
8). Having LM393 comparator chip, stable
|DO||Digital output interface (0 and 1)|
|AO||Analog output interface|