Mechanical pressure switches have been developed to switch an electrical contact, when a pressure in a process exceeds defined limits. The pressure can be too high or too low. Pressure switches have no precise local indication, no analog output signal and need no electrical power supply. These simple devices are purely optimized to guarantee an excellent repeatability and reliability of the switching behavior.
Pressure switches without power supply are used in safety critical applications. Bourdon is a well- known supplier for the equipment of power plants and offers a wide range of products especially for nuclear power stations.
But also many other applications like monitoring of pressurized chambers, tank levels, valves, compressors profit from these safe and simple solution.
Pressure switches are available in EEx ia and EEx d versions for hazardous areas. Assembled with diaphragm seals pressure switches can be used also in applications with critical process fluids or for hygienic installations in food or pharma production.
The Bourdon range of pressure switches offers reliability and proven resistance to harsh environments and processes.
Bourdon pressure switches can be custom made to match your application requirements.
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Mechanical Bourdon pressure switches are designed for alarm setting, if pressure limits are exceeded or pressure regulation between 2 setpoints.
Depending on the pressure range the sensing element is a membrane, a piston or a bellow. The sensing element is pressurized and works against the adjustable force of an internal spring.
The deflection of the sensing element operates a mechanical microswitch. The value of the setpoint is defined by the adjustment of the spring and can be adjusted in the factory or by the customer. For several microswitch types, the deadband is also adjustable. This allows separate definition of setpoint and reset point.
Bourdon pressure switches provide an excellent repeatability in a compact design. The working principle is fully mechanical and requires no electrical power supply. Wiring has to be done only to read the microswitches.