Description
Johnson Pump Ultima Switch w/Mirus | Boat Supply Store
This advanced automatic bilge pump control switch is engineered for relentless reliability in marine environments. Utilizing Mirus field effect detector cells, it operates without any moving parts or direct contact with water, eliminating common failure points like corrosion and mechanical wear found in traditional float switches. It reliably activates at a 2" fluid level and deactivates at 3/4", with a crucial 3-second delay to prevent nuisance cycling, and handles a robust 20 amps at 12/24 volts, ensuring compatibility with most submersible bilge pumps on your vessel at Boat Supply Store.
Key Features
- Eliminates mechanical wear with solid-state Mirus detector cells.
- Prevents corrosion as sealed sensors never contact water.
- Ignores oil and debris, eliminating false activations.
- Activates precisely at a 2" fluid level.
- Deactivates cleanly at a 3/4" fluid level.
- Avoids nuisance pump cycling with a 3-second delay.
- Supports all Johnson Pump submersible pumps up to 20 amps.
- Maintains operability with a unique 3-way switch for alarm control.
Specifications
| Product Specifications |
|---|
Who This Is For
Boat owners and marine professionals seeking a dependable, maintenance-free automatic bilge pump control. It is ideal for those requiring advanced detection technology that is impervious to bilge contaminants and ensures precise water level management.
How It Compares
| Feature | Johnson Pump Ultima Switch w/Mirus | Float Arm |
|---|---|---|
| Detection Technology | Mirus Field Effect Detector Cells (Digital, Solid-State) | Mechanical Float Switch, Mechanical Float Switch |
| Contact with Water | None (Sealed Sensors) | Direct Contact, Direct Contact |
| Resistance to Oil/Debris | Unaffected | Susceptible, Susceptible |
| Moving Parts | None | Yes (Float Arm), Yes |
| Activation Level | 50 mm (2") | Approx. 2 inches, Approx. 2 inches |
| Deactivation Level | 20 mm (3/4") | Approx. 3/4 inch, Approx. 3/4 inch |
| Max Amperage Handling | 20 Amps | 20 Amps, 3 Amps |
| Voltage | 12V or 24V | 12V/24V/32V, 12V |
Common Concerns Answered
Why is the initial cost higher than basic float switches?
The higher initial investment reflects the advanced Mirus solid-state detection technology, sealed electronics, and robust construction that eliminates mechanical wear and resistance to bilge contaminants, offering superior long-term reliability and reduced maintenance.
Does this unit include a bilge pump?
No, this product is an automatic control switch designed to operate an existing or separately purchased submersible bilge pump. It provides intelligent activation and deactivation based on water levels.
How does the advanced technology justify the price?
The Mirus technology ensures the switch is unaffected by oil or debris, which commonly cause failures in mechanical switches. This, combined with no moving parts and sealed electronics, significantly reduces the risk of unexpected breakdowns and costly repairs, providing a more dependable bilge pumping system.
Frequently Asked Questions
How does the Johnson Pump Ultima Switch with Mirus technology detect water?
The Mirus field effect detector cells use electronic sensing to detect the presence of water without any physical contact or moving parts.
What is the activation and deactivation level for the Ultima Switch?
The switch activates when the fluid level reaches 50 mm (2") and deactivates when the fluid level drops to 20 mm (3/4").
Can the Ultima Switch be used with oil or debris in the bilge?
Yes, the Mirus detector cells are completely unaffected by oil or foreign debris in the bilge, preventing false activations and ensuring reliable operation.
What is the maximum amperage and voltage the Ultima Switch can handle?
The Ultima Switch is rated to handle up to 20 amps at either 12 volts or 24 volts DC.
What is the purpose of the 3-way switch on the Ultima Switch?
The 3-way switch allows you to disable the piezo alarm sound while keeping the warning LED illuminated, providing a silent warning notification.
