Material: This 2PCS WaterTank/ Water Tower Water Traced Pipeline liquid level Sensor/ laboratory Control liquid level Sensor is made of ABS material, ensuring durability and reliability Multiple signal output interfaces: The sensor is equipped with four signal output interfaces, including high and low level output interface, NPN output interface, PNP output interface, and MC-NPN output interface. These interfaces allow you to easily connect the sensor to other devices such as relays, buzzers, horns, and lights. Versatile usa: Designed for water tanks, water towers, and water traced pipelines, this sensor provides accurate liquid level detection Reliable performance: This sensor utilizes digital technology to provide precise and reliable readings