Ultima Switch 20AMP 12/24V
The solid-state electronic automatic switch Ultima Switch uses the patented Mirus field effect detector cells producing micro-electrical fields that detect disruptions caused by water and fluids. Detector cells are sealed and are never in contact with water, will not rust and are not affected by oil or foreign debris.
Limited 3-Year Warranty
No moving parts, totally sealed solid-state electronics and field detectors
Environmentally sensitive; no mercury
No exposed sensors eliminate corrosion possibilities
Activates at a 50 mm (2") fluid level and deactivates at a 20 mm (¾") fluid level
A three-second delay prevents false starts from water sloshing in the bilge
Ultima Switch is rated to handle pumps up to 20A at 12V or 10A at 24V.
 
 
Part No.
Part No. USA
Description
Max Amp.
34-36303
36303
Ultima Switch Electronic Automatic Switch 12/24V
12V:20A
24V:10A
 
The automatic switch protects electrically operated
pumps and gives fully automatic operation.
The switch is made of corrosion-resistant materials.
 
 SPX FLOW Johnson Pump submersible bilge pumps have a T-slot on the housing 
or mounting bracket. You may push the switch into place on the pump.
If you wish, a small drop of water-proof adhesive will lock the switch on the T.
Screws are recommended for fastening the switch only if your pump is not equipped
with a T-mount should always be installed in parallel to the keel with the floating
body directed aft.
 
 
The Ultima Switch is a highly reliable solid-state switch which uses no mechanical parts or toxic mercury to sense water level and automatically controls a 12V DC or 24V DC bilge pump. The switch activates the pump when the water level reaches 2” or more and turns off the pump when the water level reaches below ¾”. The Ultima Switch automatically adjusts between a 12V DC bilge pump or a 24V DC pump without any adjustments necessary
 

Installation Location: 
1. Mount the Ultima Switch in a vertical position (Mount holes towards the bottom of the vessel) and close to the pump such that the water level is equal on both pump and the Ultima Switch.
2. Do not mount the Ultima Switch directly to the hull of the boat. Use a mounting block of at least ¾” thick marine plywood epoxied to the hull of the boat to fasten the Ultima Switch.
3. The bottom of the Ultima Switch can be mounted higher but never lower than the base of the pump. Note: If you are mounting the Ultima Switch on the side of the boat, make sure you fasten the Ultima Switch using the side posts and observe the same mounting instructions as you would installing the Ultima Switch in a vertical position.
 
Mounting:
1. Mark pilot holes in the base of the Ultima Switch by using the Ultima Switch holes.
2. To avoid drilling through the hull of the vessel, set your drill to the appropriate depth for the pilot holes.
3. Fasten the Ultima Switch directly to the block using #8 x 5/8” long stainless steel screws (not supplied).
 
Wiring:
1. Connect the remote manual switch and inline fuse between the battery and the Ultima Switch.
2. The wiring connections should be made with water-resistant permanent terminals. Liquid electrical tape should be used to coat the terminals. The mount connections should be above the highest water level.
3. The Brown with White Tracer (+) Ultima Switch wire should be attached to the fused wire from the positive terminal.
4. The Brown relay Ultima Switch wire to the Brown (+) pump wire.
5. The Black (-) pump wire to the negative battery terminal.
6. 2-Way Dash Panel Switch Auto/On Operation. Connect the brown switch wire lead and brown positive (+) pump wire lead to the positive (+ ON position) of the dash panel switch. Connect brown with White Tracer switch wire lead to positive (+) battery terminal (inline fuse required).
7. 2-Way Dash Panel Switch OFF/ON Operation. Connect brown switch wire lead to brown positive (+) pump wire lead. Connect brown with white tracer switch wire lead to positive (+ On Position) of panel switch (Inline fuse required)
8. 3-Way Dash Panel Switch ON/OFF/Auto Operation. Connect the brown switch wire lead and brown positive (+) pump wire lead to the positive (+ ON Position) of the dash panel switch. Connect Brown with white tracer switch wire lead to positive (+ Auto Position) of panel switch (Inline fuse required). Black negative (-) wire lead from pump always to ground.
 
Operation of the Ultima Switch
1. After the installation of the Ultima Switch is complete, hold two fingers over the raised circular areas of the Ultima Switch for approximately 10 seconds. If the wiring is correct the bilge pump will activate. If you remove a finger from the top circle, the pump should continue to be on. After the removal of both fingers, the bilge pump will no longer run after a short delay.
2. Make sure to test the Ultima Switch with water in the bilge of the vessel to reaffirm that the pump will turn on and off properly. If the bilge pump does not activate as required, a repositioning of the Ultima Switch may be necessary.
 
Equip your bilge pump with a switch for the automatic operation of your pump! 
A switch will automatically activate the bilge pump when the water level rises in the bilge and deactivate the pump as the water level is lowered. Switches available are the top-of-the-line digital Ultima Switch, an Electro-Magnetic Float Switch and a traditional Float Switch; all Mercury-free.