The Rain Sensor on robotic lawnmowers is a practical accessory that increases the efficiency and protection of both the mower and the lawn. Its main function is to inform the mower whether weather conditions are suitable for mowing grass. If the sensor detects rain or high humidity, the mower will automatically return to the charging station and wait for better weather conditions. This is essential for maintaining the quality of your lawn, plus wet grass can cause clogging and stick to the blades and other parts of the mower, which can lead to faster wear or even damage.