S637A1004/U

Honeywell S637A1004/U — S637 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. Discontinued by Honeywell — no longer in the current range. PartnerPLC sources new, surplus and discontinued Honeywell parts — request a quote for price, condition and lead time.

S637 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. Features & Benefits: Micro switch SPST snap switch is operated by metal sail inserted in an air stream Has a set of normally closed contacts which can be used to energize a signal or warning circuit when the velocity drops off 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 Honeywell S637A1004/U — S637 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. Discontinued by Honeywell — no longer in the current range. PartnerPLC sources new, surplus and discontinued Honeywell parts — request a quote for price, condition and lead time.

Brand	Honeywell
Lifecycle status	discontinued