Series PAS Differential Pressure Air Flow Sensing Switches

Series PAS Pneumatic Sensing Switches are general purpose proving switches for HVAC and Energy Management applications where pneumatic actuation is required (such as intrinsically safe environments or any area where it is desirable to avoid electrical arcing).. They sense the flow of air and provide a proportional pneumatic signal for alarm or control. PAS switches can sense static or differential air pressure up to 2.0″ w.c. (PAS-2100 models) or 12.0″ w.c. (PAS-2200 models). The pneumatic switch vents a restricted compressed air source until reaching set point; switch actuation occurs at set point, closing the vent and sending a full pressure pneumatic signal to an electri­cal switch outside of the hazardous area, or actuating a pneumatically driven element directly.