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Pressure switches

For each application the right pressure switch

A pressure switch opens or closes a corresponding switch contact as soon as a preset pressure is reached. Depending on the requirement, pressure switches are used with mechanical or electrical switch contacts, with or without displays and with various setting possibilities. Pressure switches are used in a variety of industrial and technical processes − in the broad WIKA selection you will find the right version for each application.
Buying pressure switches?

Buying pressure switches?

Order your standard instruments easily in our online shop - in the accustomed WIKA quality.

How does a pressure switch work?

A pressure switch 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.

How is a mechanical pressure switch constructed?

Mechanical pressure switches are inexpensive instruments based on mechanical measuring principles such as Bourdon tubes, diaphragm elements or diaphragm-piston measuring systems. The corresponding measuring element triggers the mechanical switch contact in the pressure switch. On switching, the mechanical pressure switch sends an electrical signal. The special feature of the mechanical pressure switch is that no further supply voltage is required for the electrical signal, which protects the application from failures.

How is an electrical pressure switch constructed?

An electronic pressure switch consists of a pressure sensor, a digital pressure display and an electronic switch and it performs the functions of switching, transmission and display in just one instrument. The function of the electronic pressure sensor is to convert the measured pressure into an electrical signal. When the preset pressure is reached, the electrical circuit opens or closes. In the case of an electronic pressure switch, functions such as delay time, switch point, reset point and hysteresis, among others, can be programmed, whereby the switch points and also the output signal can be adapted to the application-specific requirements. The electronic pressure switch also provides a continuous pressure display for monitoring the switching outputs and thus also serves as a digital pressure gauge. Learn more about our electronic pressure switch with display, model PSD-4, in our video.

Calibrate measuring instruments?

Calibrate measuring instruments?

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FAQ
FAQ

What causes zero-point drift?#

Zero-point drift, also called zero-point error, is caused by aging of the electrical components through temperature cycling and load cycling. See this blog for an overview of accuracy errors in pressure sensors.