Description
The Belimo EXT-AFS-460 Differential Air Pressure Switch 0.4-12″ WC is a sensing control part used in HVAC systems to monitor and respond to differences in air pressure between two points. It operate by detecting pressure changes within ductwork, filters, or air handling units and switching an electrical circuit when preset thresholds are reached. It is commonly installed in ventilation and building automation systems to confirm airflow, detect clogged filters or verify fan operation. The switch supports system protection and operational control by ensuring airflow conditions remain within the required range for safe and efficient
