The 251-0002 is a PRESSURE ELECTRIC SWITCH, 3-30PSI, 120 TO 277 VAC, 1 / 4 INCH BARB O.D FOR PLASTIC TUBING manufactured by LANDIS & GYR. This pressure switch is designed to provide efficient and reliable pressure control in various industrial applications. With its wide pressure range and voltage compatibility, it ensures versatile usage and optimal performance. With its high-quality construction, this pressure switch offers durability and long-lasting functionality.