For each application the right pressure switch. 25 models from WIKA, also with ATEX, IECEx, UL approvals: filters, datasheet and quote request for each model.
A pressure switch opens or closes a corresponding switch contact as soon as a preset pressure is reached. Depending on the requirement and the design, pressure switches are used with mechanical or electronic switch contacts, with or without displays and with various setting possibilities. Pressure switches are used in a variety of industrial and technical processes – in WIKA’s wide selection you will find the right version for each application.
A pressure switch is a central element in pressure measurement for monitoring and controlling pressure in industrial processes. It works either mechanically or electronically and opens or closes the switch contact depending on the measured pressure of a medium. Pressure switches are often used with pumps, valves or boosters and have the task of keeping the pressure within a predefined span, without exceeding the upper or lower limit.
Mechanical pressure switches are inexpensive instruments based on mechanical measuring principles such as Bourdon tubes, diaphragm elements or diaphragm-piston measuring systems. If, with a mechanical pressure switch, the defined pressure is reached and the switch is actuated, the switch will send an electrical signal. The special feature of the mechanical pressure switch is that no further supply voltage is required for the electrical signal. The resulting reliability is one of the advantages of mechanical pressure switches.
WIKA pressure switches are fitted with high-quality microswitches. They feature high long-term stability and precision. Even the switching of electrical loads up to 15 A / 220 V is possible without problems with a mechanical pressure switch from WIKA. For the switching of very low voltages, such as those used in PLCs, WIKA offers argon-gas-filled microswitches with gold-plated contacts. Electronic pressure switches are also very well suited for low-power switching.
For operation in hazardous areas of process engineering, WIKA mechanical pressure switches are available in Ex ia or Ex d versions. The Ex d-approved switches are available in epoxy-resin-coated cases made from copper-free aluminium.
An electronic pressure switch is based on an electronic pressure sensor. Along with the electrical switching signal, many electronic pressure switches offer an additional analogue signal proportional to the pressure. Thus, not only is it identified whether the defined switch point has been reached, but the actual measured pressure is transmitted. Electronic pressure switches often feature a display from which the measured value of the pressure can be read, while flexible settings and programming are also possible. Switch points, output signal, delay time, hysteresis and many other parameters can be individually adjusted to suit the application. Learn even more about electronic pressure switches in the WIKA blog post “What is an electronic pressure switch?”.
The successful design as well as the excellent functionality of the WIKA pressure switches were already confirmed by winning the “iF product design award 2009” for the model PSD-30. As a comprehensive further development with additional functions, the model PSD-4 electronic pressure switch is also notable.