This Lochinvar Pressure Switch is a mechanical device designed to monitor and regulate the pressure within a system. It operates by activating or deactivating an electrical circuit when the pressure reaches a predetermined level. The switch is typically used in heating, ventilation, and air conditioning (HVAC) systems to ensure that the pressure stays within safe limits. It features a robust construction for durability and reliability, with a design that allows for easy installation and maintenance. The switch has been tested and certified to meet industry standards for performance and safety.