Johnson Pump Bilge Alert High Water Alarm Panel with Sensor.

Features:
System uses patented Mirus(TM) field-effect detector cell
Alarm sensor is small, easy to mount and contained within a fully sealed case
When activated, system triggers a 100 dB piezo alarm and LED warning light on control panel
3-way rocker switch on panel (Test / Off / Armed) can disable audible piezo alarm while keeping LED warning light lit
Built-in 8-second delay prevents false alarms
Mercury-free sensor with no moving parts

Specifications:
Johnson Model No. 72303
Nominal Voltage: Specify 12 or 24V DC
Max. Current Draw: 20A @ 12V DC
Sensor Dimensions: 0.2" H x 1" W x 2" L
Panel Dimensions: 2" H x 2.47" W
Wire Size: 16 AWG
Wire Length: 30"