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Environmental & Combustion Controls
S437A1009
Switch with 1 in. x 3 in. Sail

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Overview
The 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 predetermined air velocity.

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Features

• 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.
Product Specifications  Back To Top
Description Switch
Operating Velocity (fpm) 1900 fpm-2250 fpm
Operating Velocity (m/s) 9.7 m/s-11.4 m/s
Insertion Length (in.) 3 1/2 in.
Insertion Length (mm) 89 mm
Switching 1 SPST
Contact Ratings (AFL) 8.0 A @ 120 Vac
Contact Ratings (AFL) 5.1 A @ 240 Vac
Contact Ratings (AFL) 2.0 A @ 24 Vac
Contact Ratings (AFL) 15.0 A @ 6 Vdc
Contact Ratings (AFL) 7.5 A @ 12 Vdc
Contact Ratings (ALR) 48.0 A @ 120 Vac
Contact Ratings (ALR) 30.6 A @ 240 Vac
Maximum Ambient Temperature (F) 150 F
Maximum Ambient Temperature (C) 66 C
Dimensions (in.) 2 15/16 in. high x 3 3/4 in. wide x 2 in. deep
Dimensions (mm) 59 mm high x 95 mm wide x 51 mm deep
Sail Dimensions (in.) 1 in. x 3 in.
Sail Dimensions (mm) 25 mm x 76 mm
Approvals, Underwriters Laboratories Inc UL: File: MP2618
Approvals, Canadian Standards Association CSA: Guide: MFHZ

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Product Data - (S437 POD)
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