SPX Johnson Pump Electro-Magnetic Bilge Pump Switch
SPX Johnson Pump Electro-Magnetic Bilge Pump Switch
The SPX Johnson Pump electro-magnetic bilge pump switch employs a magnetically activated reed switch that is controlled by a magnet located on top of a float. The float rises with rising bilge water. Air in the float housing is forced out through a vent hole at the top of the float housing. The float reaches the top of the housing when the bilge water is 50mm deep. The float magnet activates the reed switch, switching on the bilge pump. At the same time an air valve is shut, closing off the vent hole. This creates a vacuum above the float, causing it to stay in position at the top of the chamber as the level of the bilge water falls. When the bilge water has dropped down to 20mm, air enters through an opening at the bottom of the float housing, releasing the vacuum in the housing. The float drops down and the power to the pump is switched off. This switch has no moving parts apart from the float. It has been proven to be exceptionally reliable.

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Part No. Description Price Quantity
701102
SPX Johnson Pump electro-magnetic bilge pump float switch 12V+ 34-1900B-12V J-34-1900B 12V
$82.00 Inc GST
701104
SPX Johnson Pump electronic magnetic bilge pump float switch 24V 34-1900B 24V J-34-1900B 24V
$82.00 Inc GST