The Ashcroft Dresser 15-500psi Viton 8NA39582 15A Pressure Switch LPDN4GGV25 is an industrial electrical pressure switch designed for use in various applications. With a range of 15 to 500 psi, this pressure switch features a diaphragm actuation type and a port size of 1/4 inch FNPT. It is rated NEMA 4 and has a differential of 10 to 23 psi. The switch has a factory on/off setting of 90% of its range and offers a variety of contact forms and ratings for AC and DC applications. Made in the United States by Ashcroft, this pressure switch is a reliable and high-quality component for electrical automation systems.