Description
Cleveland Controls AFS-405-121 Air Pressure Sensing Switch
The Cleveland Controls AFS-405-121 is a versatile air pressure sensing switch engineered for dependable performance in commercial and industrial HVAC applications. With a wide sensing range of 0.05″ w.c. to 12″ w.c., this switch is well-suited for monitoring and controlling air pressure across a broad spectrum of duct, fan, and air handling systems.
Key Features
- Wide pressure sensing range: 0.05″ w.c. to 12″ w.c.
- SPDT (Single-Pole, Double-Throw) contact configuration for flexible switching control
- Designed for air pressure monitoring in HVAC ductwork, air handlers, and blower systems
- Reliable switching action helps protect equipment and verify proper airflow
- Compact, field-installable design for straightforward integration into existing systems
- Cleveland Controls quality construction for long-term durability
Typical Applications
- Air handling units (AHUs)
- Duct static pressure monitoring
- Fan proving and airflow verification
- Commercial HVAC control systems
- Building automation and safety interlock circuits
Product Specifications
- Brand: Cleveland Controls
- Model / SKU: AFS-405-121
- Switch Type: Air Pressure Sensing Switch
- Pressure Range: 0.05″ w.c. to 12″ w.c.
- Contact Configuration: SPDT (Single-Pole, Double-Throw)







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