1 This is a summary of the moisture sensor. It can be used for testing soil moisture, when the soil lack of water, the module outputs a high voltage, while output a low voltage. Using this sensor need to make an automatic flower watering device, let your plants do not need to manage in the garden

2 This is an adjustable sensitivity (shown in blue digital potentiometer adjustment)

3 Working voltage is 3.3V-5V

4 Module is a dual output mode, the digital output is simple, analog output is more accurate

5 Having a fixed bolt hole, then it is convenient to install

6 The size of small PCB: 3 * 1.6 cm
7 The power indicator light (red) and digital output indication lamp (green)
8 The comparator is used for LM393 chip, so it is able to stable work