Switches

A high quality, self-aligning diaphragm / piston sensor is the heart of a Beta switch.  The limited piston travel translates pressure at the diaphragm directly to actuation of the micro switch, with no intervening linkages or mechanisms and with full protection against very high over range pressure.
The piston sensor is isolated from the process fluid by a diaphragm and static O-ring seal, retained by a process connection port.  These three are the only process wetted parts and are available in an extensive range of materials.