Premium Marine High-Water Alarm System with Solid-State Ultima Switch Technology
Protect your vessel with the SPX Johnson 34-72303 Bilge Alert, a high-performance 12V high-water alarm system featuring the industry-leading Ultima Switch. Engineered for reliability, safety, and long-term durability, this advanced digital alarm system alerts you the moment high bilge water levels are detected — helping you safeguard your boat from unexpected flooding or pump failure.
Digital Mirus Technology: Sensor never contacts water — corrosion-free, oil- and debris-resistant
Pump Activation: 50 mm (2") ON, 20 mm (¾") OFF with 8-second delay to prevent false starts
3-Way Rocker Switch: Test / Off / Armed; silences alarm while keeping LED warning active
Solid-State & Mercury-Free: No moving parts, fully sealed electronics, environmentally safe
Electrical Ratings: Supports Johnson submersible pumps up to 20A at 12V or 10A at 24V
Safety Certified: ISO 8846 ignition protection
Model: SPX Johnson 34-72303
System Voltage: 12V
Switch Type: Ultima solid-state digital sensor
Alarm Modes: Test / Off / Armed
Compliance: ISO 8846 ignition protected
Activates bilge pump at: 50 mm (2") water level
Deactivates pump at: 20 mm (¾") water level
Includes 8-second delay to prevent pump cycling and false starts
Early high-water detection is critical for boat safety. With Ultima Switch technology and a fully sealed, corrosion-proof design, the SPX Johnson Bilge Alert offers reliable protection and peace of mind on every voyage.
Australian Dollars
