The manufacturers of pressure sensors use many different terms for the various designs of measuring instruments,  such as pressure sensor, pressure transmitter, pressure transducer, etc.

At WIKA, the term: “pressure transmitter” is commonly used to refer to a pressure sensor equipped with standardised electrical and mechanical interfaces and a standardised output signal.

The working principle of a pressure transmitter is as follows:

The pressure of the medium to be measured is guided via a standard process connection thus affecting the internal pressure sensor element. The internal electronics converts the raw sensor signal into a filtered, amplified, temperature-compensated and standardised signal, such as the 4 … 20 mA signal. This output signal is delivered via a standardised connector or a cable to the subsequent unit for signal processing.

Would you like to have more information about the pressure transmitter A-10 for general industrial application? Then click here.

Due to the worldwide rising energy costs, the energy-efficient operation of refrigeration systems becomes a must. According to estimates, more than 90% of the refrigeration systems worldwide are not yet equipped with continuous control. They have been optimised and set for a certain operating state/refrigeration capacity – which means that they operate outside the optimum in all other operating states, whenever less capacity is required. This results in a waste of valuable energy.

In the future, systems without closed-loop control will no longer be acceptable. This is why manufacturers of refrigeration systems are increasingly using electronic pressure sensors, in order to control pressure and thus the resulting temperature of the refrigerant with high precision. The pressure sensors R-1 and AC-1 have been developed specifically for this use and in practice achieve substantial savings in electricity costs for the operators.

The recovery of drinking water from ground water has top priority in many countries. In Germany, this method has a share of about 70 per cent in the water supply. The water drawn from depths of several hundred of meters below the earth’s surface is normally in perfect hygienic condition.

The ground water is pumped up to the surface by means of powerful submersible pumps. The ratio between the water removal and the replenishment of the ground water must be permanently monitored. Submersible pressure transmitters which continuously measure the water level are used for this purpose. This application requires special low-maintenance and very durable instruments. The WIKA submersible pressure transmitters can be submerged completely and operated permanently under water. They are reliable instruments that deliver value for many years.

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An important data sheet specification for industrial measuring instruments in general and pressure sensors in particular is the so-called ingress protection. In this context, an alledged printing error in the data sheet of the electronic pressure switch PSD-30 was already pointed out to me several times because it says that the device meets both IP65 and IP67 standards at the same time. Yes, this is absolutely true. Sounds strange? But it is true!

The explanation for this is relatively simple and straightforward considering  the fact that the two IP-ratings and thus the underlying test procedures are completely different and the supposedly “higher” ingress protection IP67 does not cover or include automatically the ingress protection IP65.

The PSD-30 was designed and tested for both IP-ratings. This is confirmed not only by WIKA in-house tests, but also by external tests carried out by independent test centres, for example, as part of UL approval.

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