Tank-Check RF-431 Float Switch is a versatile and easy-to-install liquid level alarm. The alarm signals with sound and light when the liquid level in the monitored area reaches the alarm’s float sensor. The sensor is highly versatile as it does not require solid particles in the water to function, and solid matter in the liquid does not interfere with its operation. The strong LoRa link has a range of up to 100 meters. The battery life is up to 10 years. Models in the RF-431 series have two alarm transfer relays for connecting for ex. a 4G or 5G modem. One relay is for high level alarm and the other for loss of wireless connection.