空中差别的压力开关于供暖、通风和空调

Air Differential Pressure SwitchModel AFS are general purpose airflow proving switches designed for HVAC, detection of blocked filters and fan suction, air flow monitoring in ducts, pipes, tunnels, and other energy anagement applications. It may be used to sense positive, negative or differential air pressure. Features: 1) Field ajustable range: 0.05±0.02" W.C. to 12.0" W.C.; 2) Electrical rating: 300 VA pilot duty at 115-277V AC, 10amp, non-inductive, 277V AC, 60Hz; 3)Contact Arrangement: SPDT, SPST; 4)Operating Temperature Range: -40 82C; 5)Sample Line Connections: Ferrule and nut compression type connectors that accept 0.25" OD rigid tubing, or quick connection tube.