Description
The Liebert 128199P1S 2-port Differential Air Switch is a sensor component that monitors pressure differences between two points in airflow systems. It is typically installed in air handlers, ductwork, and fan assemblies to detect changes in static pressure or airflow levels. By opening or closing its contacts in response to pressure variations, the switch can signal fans, compressors, or control circuits to adjust operation. Within HVAC systems, this differential air switch directly regulates airflow monitoring and safety operations, ensuring that connected equipment responds to proper ventilation conditions and maintains consistent performance in commercial and data center cooling applications.
