Feature: 1. Coolant Level Sensor: When the water level of the water tank is lower than the probe position of the alarm sensor, the sensor outputs the switch signal to the generator control device. 2. For Stable Operation: The engine coolant level sensor can better promote low water level alarm and shutdown function for stable and safe working performance as well as higher efficiency. 3. The Reliable Feature: The normally open water tank level sensor has 5‑35V DC working voltage, triode open collector OC output, and 100mA maximum output current during the operation. 4. Broad in Application: Can be used in equipment and devices that require water level alarms, and is also suitable for non corrosive liquid with similar electrical resistivity like water. 5. Simpler Installation: Designed to have 1/2NPT installation thread, the engine coolant sensor with a light weight and a compact size is very convenient to install within several minutes. Specification: Item Type: Coolant Level Sensor Installation Thread: 1/2NPT Working Mode: NO, normally open. Output Mode: Triode open collector OC. Maximum Output Current: 100mA. Package List: 1 x Coolant Level Sensor6 x Accessory