Automatic Boat Bilge Pump Switch 12V 24V 32V Submersible Marine Grade Water Level Sensor for Bilge Water Features： 1、Automatic Drainage: Used with a micropump to form an unattended drainage system with switches that provide reliable pump operation from a fully sealed bilge. 2、Wide Application: With ultrasonic welding, which has has good sealing and can be used for automatic operation of 12V, 24V or even 32V bilge pumps or alarms. 3、Operation: When the water level is higher than 1.77‑1.97in, the pump will automatically turn on, and when the water level drops to 0.79‑0.98in, the pump will automatically turn off. 4、Installation: The switch is installed in the bilge with the bilge pump (not included), for better performance, it should be installed horizontally with a maximum angle of 30 degree. 5、Durable Material: Constructed with heavy duty ABS material, simple appearance, easy installation, internal metal contacts, to ensure reliable start and stop, easy installation. Specification： Item Type: Boat Float Switch Material: ABS, metal Working Voltage: 12V/24V/32V Maximum Current: 25A Wire Gauge: 14AWG Note: Connection: 3. Connect the negative pole (black wire) of the pump to the negative pole of the battery. Package List： 1 x Boat Float Switch 1 x Manual 2 x Screw