Cleveland Controls Model AFS-221-112
Model AFS-221-112 Air Pressure sensing switch is an airflow proving switch designed for duct heater, oven and other HVAC or Energy Management applications where an open-mounted, nonadjustable switch is desirable. It is especially suitable for surface-mounting in areas where internal access is limited. It can be used to sense positive, negative or differential air pressure. The DFS-221-112 is equipped with a convenient barbed sample line connector that accepts flexible tubing.
The plated housing contains a diaphragm and a snap-acting SPDT switch. The barbed sample line connections located on each side of the diaphragm accept flexible tubing. The electrical connection consists of male 1/4-inch quick connect terminals.
Note: Refer to Cleveland Controls website for complete specifications: http:// /CC%20PDFs/dfs221112.pdf
