The 77029-00000010-01 is an extended-duty pressure switch designed for reliable operation in demanding applications. This normally open (N.O.) switch is factory set to 2 PSI within a 1-3 PSI contact setting range and features a polyimide film diaphragm and gold-plated silver alloy contacts. It is engineered to handle an operating pressure of 150 PSI, a proof pressure of 500 PSI, and has an operating temperature range of -40°F to +250°F. The switch includes a Metri-Pack connector and is compatible with air, motor oils, and jet fuels, making it ideal for various industrial and automotive systems.