Switch Sail 2 Wire SPST

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.

• 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
• 3-1/2 in L insertion
• 8.0 A at 120 VAC, 5.1 A at 240 VAC, 2.0 A at 24 VAC, 15.0 A at 6 VDC, 7.5 A at 12 VDC contact ratings (AFL)
• 48.0 A at 120 VAC, 30.6 A at 240 VAC contact ratings (ALR)
• 1900 fpm to 2250 fpm operating velocity
• 1 x 3 in sail