Flyrobo (2 pc) Plant Watering Alarm Alerter Humidity Moisture Sensor - - Electronic Components Electronic Hobby Kit

Length: 140 mm Width: 15 mm Working Voltage: 3V This is Plant Watering Alarm Alerter Humidity Moisture Sensor. It is inserted into the ground close to a plant, and when the soil is dry, it makes a tiny chirp to signal you to water the plant. It uses capacitive humidity sensing as opposed to resistive humidity sensing. The alarm level can be set for each plant individually. As water is consumed by the plant, It will detect the low moisture level and will start to emit rare short chirps. As more water evaporates, Chirp will increase the alarm rate. The sensor can detect if it's day or night by measuring the amount of ambient light and will not make noise when it's dark. Applications: Garden plants Moisture detection Package Includes: 1 x Plant Watering Alarm Alerter Humidity Moisture Sensor