Johnson Pumps 72303-002 BilgeAlert High Water Alarm with Ultima Switch 24V

The Johnson Pumps 72303-002 BilgeAlert High Water Alarm is a reliable, digitally advanced bilge water detection system designed to alert boaters the moment rising water becomes a threat. Engineered by SPX FLOW Johnson Pump and assembled in the USA, this 24V system pairs a panel-mounted alarm with the Ultima Switch for a complete, easy-to-install solution.

Patented Mirus™ Field Effect Technology:

Unlike traditional float-style switches, this alarm uses the patented Mirus field effect technology to detect the presence of liquid without any moving parts. The fully sealed sensor never makes direct contact with bilge water, meaning it will not corrode and is completely unaffected by oil, fuel residue, or debris — dramatically extending its service life.

Key Features:

• Voltage rating: 8.0 to 28.0 VDC — compatible with both 12V and 24V systems (optimized for 24V use)
• Trigger-on delay of 3 seconds after water submersion to prevent false alarms
• Trigger-off delay: immediate upon sensor removal from water
• Panel-mounted alarm module with audible beeper for instant notification
• Includes Ultima Switch — rated up to 10 amps at 24V, capable of handling Johnson Pump submersible bilge pumps
• Three-way rocker switch with Test / Off / Armed positions for easy operation and system verification
• Totally sealed fluid detector — no corrosion, unaffected by oil or debris
• Detector mounts on bulkhead, stringer, inner transom, or hull above the automatic float switch level
• CE marked and compliant with ISO marine electrical standards

The Johnson Pumps BilgeAlert 72303-002 is the smart choice for any 24V vessel where bilge water monitoring is critical. Its solid-state sensing technology, audible alarm panel, and integrated Ultima Switch make it a complete high-water detection and response system in a single package.