Herion 33D pressure switches typically last 100 million cycles, according to the manufacturer. The IP65-rated devices can be used in pneumatic and hydraulic systems and work from vacuum to 10,000 psi. They are fully programmable for NO, NC, or window operation. They feature backlit real-time LEDs and selectable pressure units for global use. Stainless-steel wetted parts work with a variety of fluids.