Description
The Siemens Industrial Controls QBM3230U03UD Air Differential Pressure Sensor measures low pressure differences from −0.3″ to +0.3″ water column in building automation applications. It is used to monitor airflow across filters, ducts and ventilation equipment, providing accurate pressure feedback for system control and diagnostics in HVAC systems. Commonly installed in air handling units and variable air volume systems, it helps detect airflow restrictions and supports balanced operation. Its role within the system is to ensure proper airflow regulation contributing to stable performance and efficient operation.
