The Trafag 8288.78.3517 is a high-quality, robust mechanical pressure switch, also known as a pressostat, from the proven 9B4 series. Designed for reliability and precision, this device is ideal for monitoring and controlling pressure in a wide range of industrial applications. Its bellows-based sensing element ensures stable and accurate switching over a long service life. The switching point and differential are easily adjustable, providing flexibility for various system requirements. Housed in a durable casing with IP65 protection (when correctly installed with connector), it is suitable for demanding environments, including hydraulics, machine building, and process technology.