Description
Johnson Controls AFS-405 Air Pressure Sensing Switch Overview
The Johnson Controls AFS-405 is a precision-engineered air pressure sensing switch designed for reliable performance in HVAC and combustion applications. With a wide sensing range and durable gold contacts, this switch delivers dependable operation in demanding environments where accurate differential pressure detection is essential.
Key Features
- Sensing range: 0.05″ ± 0.02″ to 12″ w.c. (water column)
- SPDT (Single-Pole, Double-Throw) contact arrangement for versatile circuit control
- 1/4″ OD sample line connection for easy integration into existing pneumatic or air-sensing lines
- Gold contacts for enhanced electrical conductivity and long-term reliability
- Maximum operating pressure: 1/2 PSI
- Compatible media: air or combustion by-products that will not degrade silicone
Application & Design
The AFS-405 is ideally suited for monitoring air pressure differentials in HVAC systems, combustion equipment, and building automation applications. Its silicone-compatible media design makes it a strong choice for use in flue gas and combustion by-product environments. The SPDT contact arrangement allows the switch to serve both normally open and normally closed circuit configurations, providing flexibility for a wide range of control system designs.
Specifications
- Model: AFS-405
- Brand: Johnson Controls
- Sensing Range: 0.05″ ± 0.02″ – 12″ w.c.
- Contact Arrangement: SPDT
- Sample Line Connection: 1/4″ OD
- Contact Material: Gold
- Maximum Pressure: 1/2 PSI
- Compatible Media: Air or combustion by-products that will not degrade silicone
Why Choose the Johnson Controls AFS-405?
Johnson Controls is a globally recognized leader in HVAC controls and building automation. The AFS-405 reflects their commitment to precision and durability, making it a trusted choice for HVAC technicians and contractors who require accurate pressure sensing in commercial and industrial environments. Gold contacts ensure minimal resistance and maximum longevity, even in high-cycle applications.
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