Johnson Pumps 36303 Ultima Automatic Bilge Pump Switch

The Johnson Pumps 36303 Ultima Switch is a highly reliable solid-state automatic bilge pump switch designed for marine applications. This advanced switch uses patented Mirus field effect detector cells that produce micro-electrical fields to detect disruptions caused by water and fluids, ensuring automatic pump activation when needed.

Advanced Solid-State Technology:

• Patented Mirus field effect detector technology detects changes in dielectric constant
• Totally sealed detector cells never contact water, eliminating corrosion issues
• No moving parts, no mercury, and no exposed sensors for maximum reliability
• Not affected by oil, grease, diesel fuel, gasoline, or foreign debris in the bilge
• Digital technology ensures consistent performance in harsh marine environments

Operating Specifications:

• Activates bilge pump when fluid level reaches 2 inches
• Deactivates pump when water level drops to 3/4 inch
• Built-in delay (3-8 seconds) prevents false starts
• Rated for pumps up to 20 amps at 12V or 10 amps at 24V
• Compatible with all Johnson Pump submersible bilge pumps

Additional Features:

• Unique 3-way switch disables piezo alarm while keeping warning LED lit
• Environmentally sensitive design with no hazardous materials
• Easy installation with included instructions
• Compact design fits in tight bilge spaces

The Johnson Pumps Ultima Switch provides peace of mind for boat owners by ensuring reliable automatic bilge pump operation without the common failure points associated with traditional float switches. Its ability to ignore petroleum products while still detecting water makes it ideal for marine bilge applications.