United Electric H400K-456-M540 SPDT Differential Pressure Switch 2-20 PSI

The United Electric H400K-456-M540 2/20 Spdt Diff Switch Viton is a heavy-duty switch for monitoring and controlling air pressure in HVAC systems. Because of its special Viton seals, this two-position, single-throw switch is immune to the strong chemicals and high temperatures that are frequently encountered in HVAC systems. This operates by keeping an eye on the pressure differential between two system points. The switch begins to act when the pressure differential hits a predetermined threshold, informing the HVAC system to modify elements such as temperature or airflow. This switch is frequently found in fan coil units, air handling units, and other HVAC equipment. It is essential to maintain the ideal air pressure in these systems for both safe and effective operation.