This Lochinvar Pressure Switch is a mechanical device designed to monitor the pressure within a system and respond accordingly. It operates by opening or closing 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 safe operation. It has a set point range of 0.5 to 50 PSI (Pounds per Square Inch), with an operating temperature range of -40 to 180 degrees Fahrenheit. The product features a Single Pole Double Throw (SPDT) contact arrangement for versatile use and is constructed from durable materials for longevity.