This is a simple moisture sensor that can be used to detect soil moisture. When the soil lacks water, the sensor output value decrease, and vice increase. Use this sensor to create an automatic watering device that eliminates the need for human management of plants in your garden. The sensor has been gold-plated, which can extend its service life. Insert it into the soil and then use an AD converter to read it. With his help, the plant remind you: Hey, I'm thirsty, please give me some water., Manufacturer: Littimoon