S637A1004 | Honeywell Sail Switch 1" × 3" Metal Sail tier_C_61_160 ensuring early fire detection in

ensuring early fire detection in a wide range of environments

8% for 50°F (28°C) change Battery Not Included (Sold Separately) Operating Conditions Freezer certified

3 x 40 mm (7

engineered for robust variable speed drive applications

S637A1004 | Honeywell Sail Switch 1" × 3" Metal Sail tier_C_61_160 ensuring early fire detection inDescription The Honeywell S637A1004 is a line voltage sail switch designed to sense air velocity in warm air ducts and ventilation systems. It uses a metal sail that actuates a SPDT snap switch, completing burner or fan control circuits only when sufficient airflow is present. Technical Specifications Condition New Never Used Surplus Brand Honeywell Category HVAC Controls Part Number S637A1004 Subcategory Sail Switch Switch Type SPDT snap switch Sail