Cleveland Controls AFS-A-173 SPDT Air Pressure Sensing Switch 0.05"-12" WC

The Cleveland Controls AFS-A-173 Sensitive air pressure switch is used in the HVAC systems to measure air movement or pressure. This SPDT switch turns on an electrical circuit depending on fluctuations in air pressure between 0.05 inches WC and 12 inches WC. It operates based on pressure differential when the setpoint is attained, the switch toggles state, indicating the system. Often installed in air handlers, furnaces and rooftop units, it provides adequate ventilation and equipment operations. Advantages include high reliability, accurate pressure measurements, and protection of equipment from being operated under low air flow rate. This serves to keep the efficiency of the HVAC system intact and further to prevent them from being damaged.