Trane CNT4991 Pressure Switch SPST with Mount Bracket 10"

The Trane CNT4991 is a pressure switch that controls the accurate air pressure in the Trane HVAC systems. This SPST switch is rated for 0.1" of the water column, which is exactly what you would want in a low-pressure monitoring application. It has a handy mounting bracket for secure installation in your ducting or other pressure spaces. A positive connector is provided on the Trane to ensure secure electrical connections. This pressure switch is an electrical circuit that opens or closes depending on the ambient air pressure. The switch turns on when pressure hits a predefined setpoint that can be changed within the 0.1 In-Wc range, halting or allowing current flow.