Measurement range

ABB's BETA pressure and temperature switches offer safe, reliable performance in extreme conditions. Fully certified to leading international standards, the range includes pressure, differential pressure, vacuum and temperature switches, suitable for measuring fluids and gases in a wide variety of applications.

Switches have a precisely engineered, self-aligning, piston sensor which gives precise operation.

The limited travel in the piston, and its direct contact with the microswitch, allows accurate pressure transmission and protection against the highest over range pressure.

The piston sensor is isolated from the process fluid by a diaphragm and static O-Ring seal and retained by a process connection port. These are the only process wetted parts.

BETA switches are suitable for safety installations and are certified for use in SIL2 applications. The BETA temperature switch is a pressure switch enclosure with built-in sealed two-phase temperature sensor for gas and fluid applications. As the temperature of the process increases, the vapour pressure of the liquid also increases. If vapour pressure exceeds the setpoint of the pressure switch, then the switching element will be actuated.