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General

Definition of the IP68 rating in theory and practice

Michèle Beyer | General
level probe IP68

Unfortunately, we are asked too rarely regarding the specification of the IP68 rating for our pressure sensors and submersible pressure transmitters, i.e. how deep such an instrument may be submersed. However, this is not only a very meaningful question but also a …

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14-segment-display vs. 7-segment-display: Advantages/comparison with regard to readability in electronic pressure switches

Jürgen Reiser | General

Durable, robust and easy-to-read are the requirements for the display of industrial electronic pressure switches. State-of-the-art is typically a 4-digit 7-segment LED display in red. However, in particular the display of letters on the seven segments is only possible …

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Connection diagram of PNP and NPN transistor outputs for electronic pressure switches

Jürgen Reiser | General
pressure switches with PNP and NPN output

Manufacturers of electronic pressure switches often offer both PNP and NPN switching outputs. Here is a brief explanation how the two different outputs should be connected. In principle, both are bipolar transistors in which only the internal arrangement of the pn …

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The definition of MTTF and MTBF – and what is the difference?

Anna Gries | General
MTTF or MTBF?

The two definitions of MTTF and MTBF differ only slightly. Written out, the two acronyms read as follows: Mean Time To Failure  (MTTF) – i.e., the component/instrument will be replaced, following a failure Mean Time Between Failures (MTBF) –  mean time between …

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What are front flush diaphragm pressure connections used for?

Sabine Mai | General
comparison of pressure connections

Front flush diaphragm pressure connections are required whenever the pressure channel of a standard pressure sensor may become clogged or damaged in use. This problem is encountered, for example, with crystalline, viscous, aggressive, adhering or abrasive media. …

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Welcome to the WIKA blog

In our English-language blog you can expect many interesting articles on pressure, temperature, level, force and flow measurement, and also on the subject of calibration technology. Furthermore, there are various insights into the world of the WIKA group of companies – seen from different angles.

Most-read articles
  • Definition of the IP68 rating in theory and practice

  • Connection diagram of PNP and NPN transistor outputs for electronic pressure switches

  • Temperature coefficients (TC) of pressure sensors

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