Description
The United Electric H400K-457 Differential Pressure Switch is used to measure the differences in pressure between 0 and 30 PSI, and it has a NEMA-4 enclosure which is applied to protect in HVAC systems. It is commonly mounted on filters, fans, or pumps to measure system pressure and activate control circuits when limits are exceeded. The switch has a single-pole, double-throw contact that indicates a pressure change to allow automated responses of the system. Its purpose is vital in ensuring that there is appropriate airflow, and equipment protection, and that it operates pressure-sensitive parts.
