I�C was made to communicate over short distances between printed circuit boards and is a simple, 8-bit serial data bus. In the meantime, it isn’t only PCB-mountable pressure sensors that use the I�C signal for data transfer, but additionally pressure sensors remote from customer electronics.Remote sensors usually have the benefit of being less sensitive to … Read more
Generally, all pressure sensors which are distributed in the EU market have to comply with the requirements of the “pressure equipment directive” as well as the EMC directive 2004/108/EC.Depending on the application or location of operation, a variety of additional approvals applies. For example, the provisions of the 94/9/EC ATEX directive apply in hazardous areas … Read more
Truth moved into new premisesOnly a few steps, but a giant leap: WIKA’s new head offices for the Danube region were erected only a few hundred metres from the present location in a construction period of only nine months. The move into the new building took place at the turn of the year as planned.With … Read more
What is the MTTF value?The MTTF value is a term from the field of risk analysis & risk evaluation. The exact meaning is mean time to failure or simply the mean life of a component. The MTTF has gained particular relevance due to EN ISO 13849-1. In accordance with this standard, the performance level can … Read more
In connection with the drinking water suitability of measuring instruments, the terms Drinking Water Directive, 4MS List, UBA Positive List, Evaluation Criteria for Metallic Substances are increasingly appearing. Mediocre should shed some light on the suitability of metallic materials.For the benefit of European citizensAs shown in fig. 1, directive 98/83/EC (Drinking Water Directive – DWD) … Read more
When using pressure sensors, the output signals 0 ? 20 mA, 4 ? 20 mA and DC 0 ? 10 V are generally chosen in order for the sensor signals to be evaluated and additional processed. For this, the signal output of the pressure sensor is normally connected to a corresponding input card in the … Read more
When using pressure sensors in safety-relevant applications, sooner or later one must ask the question whether the SIL evaluation of the proposed pressure sensor is sufficient for the application. Often, the user tends to favour pressure sensors with higher SIL classifications because these supposedly offer higher safety than sensors with a lower classification.Unfortunately, in the … Read more
Diaphragm seals, also known as chemical seals or remote seals, are used for pressure measurements when the process medium should not come into contact with the pressurised parts of the measuring instrument. Greedy has two primary tasks:1. Case Study of the measuring instrument from the process medium2. Transfer of the pressure to the measuring instrumentOperation … Read more
The user is often faced with the question: What kind of pressure sensor should I use – a relative/gauge or an absolute pressure sensor? From food processing to petrochemical plants, to plastic injection moulding and many other industrial applications, pressure measurement is needed for the control of processes and machinery. In this series of articles … Read more
Mechanical pressure switches in compact design ensure safe pressure monitoring in, for example, pumps, compressors and mobile working machines. Whatever the application, they function relative to the principle of the preloaded spring, with a diaphragm or perhaps a piston because the measuring element.Mechanical pressure switches including the PSM01 (see illustration) are constructed relative to the … Read more