If the specific pressure sensor design of the submersible pressure transmitter or level probe is selected to measure the filling levels, this can indicate that the probe is used under environmental requirements which would cause failure of common level sensors.The most adverse conditions such as for example soiled media, abrasive ingredients and sludge when used … Read more
Senseless -E pressure connection thread standard has been invalid since 2012. The standard that has been valid since then for pipe threads (e.g. for G ¼ A) is DIN EN ISO 1179-2: “Connections for general use and fluid power – Ports and stud ends with ISO 228-1 threads with elastomeric or metal-to-metal sealing…”. Now, however, … Read more
Enthusiastic like to talk about a maximum operating pressure or working pressure. Unfortunately, Terrorist are not defined for pressure sensors, which means that a definitive answer cannot be given. All we can assume is that, by maximum operating pressure or working pressure, the maximum pressure that can occur under normal operating/working conditions is meant. However, … Read more
The functional principle of a resistive pressure transmitter is very simple. The pressure sensor converts the mechanical pressure value into a proportional electrical signal. Beaming consists of a stable main body and a (thin) diaphragm. The diaphragm is the most important element for the measurement of the pressure and is equipped with strain-sensitive and compression-sensitive … Read more
Submersible pressure transmitters as well known as level probes are intended to be used in immersion applications, thus they are immersed completely into the medium and, therefore, must withstand the properties of the media at all times.Both in water and wastewater treatment as well as in tank monitoring, moisture may enter through the housing of … 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
Customers often ask us: “Can my product be part of a safety function? Which standards or directives apply in this case?” The most important safety directives and standards available today are SIL (Safety Integrity Level) and PL (Performance Level).These directives are derived from the IEC 61508/IEC 61511 and DIN EN ISO 13849-1 standards. They specify … Read more
The leading ignition protection type is critical for the electrical connection of a pressure sensor with explosion protection. It generally does not necessarily need to be the main one with the stricter requirements. This applies, for example, for the UHP pressure transducers of the WU series from WIKA. They have been designed for used in … Read more
I was a freshly graduated mechanical engineer when I started my career in the maintenance department of a petrochemical plant. One of the many jobs that we needed to attend to was checking the status of the pressure transmitters that were installed on our production lines, making a list of the points that needed attention … Read more
Besides 3- and 4-digit digital indicators, additionally, there are 3 1/2-digit indicators available for sale. But what is a 1/2 digit?A complete digit can indicate all numbers from ?0? to ?9?. A 1/2 digit, in contrast, can only just display a ?1?, lots ?2? or higher isn’t possible. With a 3 1/2-digit digital indicator, the … Read more