Differential pressure switches

Mechanical differential pressure switches have been developed to switch an electrical contact when the difference between 2 pressure values in a process exceeds defined limits. The pressure difference can be too high or too low. Differential 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.

Differential pressure switches without power supply are used in safety critical applications.

Many other applications like monitoring of filters, level in closed tanks and compressors benefit from these safe and simple solutions.

Differential pressure switches are available in EEx d versions for hazardous areas. Assembled with diaphragm seals, differential pressure switches can be used also in applications with critical process fluids or for hygienic installations in Food & Beverage or Pharmaceutical productions.

Baumer Technologies range of differential pressure switches offer reliability and proven resistance to harsh environments and processes.

Baumer Technologies pressure switches can be customized to match your application requirements.

Select among a complete range of:

• Pressure ranges: 3 ... 20 mbar to 2 … 25 bar
• Setpoint factory adjusted or set by the customer
• Fixed deadband
• Different types of microswitches depending on the applications
• Explosion proof version EEx d IIC T6

Baumer Technologies differential pressure switches are designed for alarm setting if limits of pressure differences are exceeded.

Depending on the pressure range the sensing element is a diaphragm or a bellow. The sensing element is pressurized from 2 sides 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.

Baumer Technologies differential 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.