Cleveland Controls AFS-293 Air Pressure Sensing Switch

The Cleveland Controls AFS-293 Air Pressure Sensing Switch is a differential air component used to detect pressure changes in airflow systems. It operates using a diaphragm-calibrated spring that causes an electrical switching action when the set pressure threshold is reached. In HVAC systems, it is installed within air handling units, furnaces, and ventilation equipment to confirm proper air flow conditions before allowing system operation. It helps ensure safe system start-up and continued operation by monitoring airflow consistency and sending control signals when pressure conditions fall outside the expected range.