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Honeywell S437A1025 Sail Switch, 1 SPST with Case and Cover

4.9 (1) Write Review
Free shipping on orders over $29.99

$228.96

$ 92 .99 $92.99

In Stock

About this item

  • Micro Switch SPST snap switch is operated by metal sail inserted in an air stream!
  • Sail can trimmed to one-half the original size to double the velocity required to close the snap switch contacts
  • Switch differential can be manually adjusted by turning a knurled knob on the snap switch
  • A conduit knockout is located on each end of the case for wiring convenience


S437 Sail Switches respond to the air velocity in heating or warm air ducts, such as used in farm crop dryers. The switch completes a 24V or line voltage burner control circuit only when the blower or fan has produced a preset air velocity.


A. Thinker
Reviewed in the United States on December 3, 2019
Does the job right. Immediate shipment.