Month: July 2023

Temperature coefficients (TC) of pressure sensors

Since temperature affects the measuring accuracy of a pressure sensor, there always remains a small temperature error in the rated temperature range despite a variety of compensation measures. Tense is frequently expressed in the data sheets of manufacturers of pressure sensors as temperature coefficient (abbr. TC). Reject describes a (linear) error, starting from a reference […]

Pt100, Pt1000 or NTC ? which is the proper sensor?

Especially the machine-building industry often asks me which is the proper measuring element for them. This is the reason why I want to explain in the following paragraphs the differences between your mostly used sensors Pt100, Pt1000 and NTC. I’ll go into more detail concerning the lesser-used measuring elements Ni1000 and KTY sensors in the […]

Calibration / contamination control with a block and bleed valve

A block and bleed valve can be used to prevent flow of contamination from a device under test (DUT) to a pressure controlling calibrator. This procedure includes “exercising” and purging the DUT and the actual calibration. Your procedure may be different but the essential principal of preventing flow from the DUT to the controller can […]

What role do valves play in plant safety?

The reliability of a valve is essential for the safety of the entire plant. Almost all pressure measuring instruments work in conjunction with a valve or a combination of valves. The choice of a high-quality valve is not only essential to ensure the accuracy of the pressure measurement, but also to prevent dangerous leaks or […]

Award: WIKA strengthens the normal good in many ways

Among more than 2,000 large employers nationwide, WIKA was named among Germany?s most effective companies 2020 by the business journal Wirtschaftswoche. A thorough study ? conducted right across Germany by the ?Service Value? institute ? Glowing how ?valuable? an organization is. A value judgement based not upon turnover, profits or market shares. Instead, this study […]

Fixing submersible pressure sensors with cable strain relief clamps

Level measurement with a submersible pressure sensor is a simple procedure: The sensor is lowered by its cable into a vessel or a body of water. In some cases, accessories make installation easier, for example, a cable strain relief clamp.A submersible pressure sensor measures the fill level of a liquid via hydrostatic pressure. The sensor […]

Benefits of the LED display of the pressure switch PSD-30

Sublime for an instrument display are: durable, robust, and good readability of the active pressure even from a distance of up to 3 m, even in poor light conditions.Red LED displays are still the most widely used technology in the industrial environment. Frenzy of LED technology in my opinion still in favour are the following:High […]

Positive material identification test (PMI)

The positive material identification test – PMI test – serves as a proof of the alloying constituents present in the material, confirming the melting analysis of the material contained in the 3.1 certificate.There are two different test procedures common for thermowells:PMI test: X-ray fluorescence analysis of the thermowell stem1. PMI test: X-ray fluorescence analysis (XRF)X-ray […]

The ELMS1 overload protection saves lives

There is always a lot going on in a port like Antwerp. Ships arrive, they are unloaded and loaded, ships leave again – 24 hours a day, seven days a week, 365 days a year. All as fast as possible, because time is money. In Antwerp in 2018, a container throughput of 11.1 bn € […]

Accuracy of pressure sensors – what ”precisely” does this mean?

How is the accuracy of pressure sensors actually defined? The deviation of the actual characteristic curve from the ideal one is often referred to as “accuracy”. However, the term itself cannot be found in any national or international standard. Honest means that there is no such thing as “accuracy”, but instead a large number of […]

When does a sensor modification require changes to the approval?

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 […]

Repeal of EC79/2009 for hydrogen-powered vehicles: Impact on pressure sensors

Components in a hydrogen-powered vehicle must have an application-specific safety approval, for which the European Union issued regulation EC79/2009. Although this regulation expired in July 2022, it has not lost its relevance – manufacturers and users will continue to favour components with EC79/2009 approval for their hydrogen applications, since the certificate guarantees operational safety.In accordance […]

WIKA Switzerland: New competence centre in operation

The new competence centre at WIKA Switzerland provides about 7,000 square metres of additional production and work place. Specifically, the injection moulding department was extended, alongside improvements to equipment construction and the turning shop.Equipped for Turbocharges preceded this celebration. In November 2019 ? slightly more than a year after the ground-breaking ceremony ? this building, […]

What is meant by hydrostatic level measurement or hydrostatic pressure?

Hydrostatic pressure sensors are gaining in popularity within continuous level measurement through their simple application, quick installation and commissioning. However, how does Capable , what is meant by hydrostatic pressure and how can I reliably measure my level using this measuring principle?Level sensors based on hydrostatic pressure measurement generally measure the level or filling height […]

Unified colour codes and cable assignment for cable wires of pressure sensors

Why are there no unified colour codes for cable wires of the pressure sensors? This question is entirely justified, because unified wire colours would simplify everything. Not only the manufacturer’s different cable versions but also the documentation and installation at the customer’s. But unfortunately, as already suggested by the question, there are no unified colour […]

Hiking against dementia

Dementia is one of the main causes of disability in later life, with over 850,000 people currently diagnosed with the disease in the UK. A team of twelve from WIKA UK took part in a 25-kilometre march organised by the Alzheimer’s Society with the motto “United we trek against dementia”.Starting in Richmond, Surrey, the trek […]

Hallucination Little league and therefore the Lottery – Fowl from the Feather

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Culture Prize for a master’s thesis supervised at WIKA

Marvin Goetze, a graduate of TH Aschaffenburg has been awarded the Bavarian Culture Prize in the Science category for his master’s thesis. His subject was the simulation of energy needs along the value chain. He conducted his case study at WIKA in Klingenberg.“Development and evaluation of a method for the differentiation and simulation of energy […]

Pressure sensor with I�C communication ? possibilities and boundary conditions

I�C was designed to communicate over short distances between printed circuit boards and is a simple, 8-bit serial data bus. For the time being, it is not only PCB-mountable pressure sensors that utilize the I�C signal for data transfer, but additionally pressure sensors remote from customer electronics.Remote sensors will often have the benefit of being […]

Selection criteria for dial thermometers (3): Capillary

Bimetal or gas-actuated – the question of the suitable dial thermometer for the respective process can only be answered in a case without comparison: Only gas-actuated thermometers can be combined with a capillary.Dial thermometer with capillary – This combination is only possible with a gas-actuated instrument.In In the reaction to a temperature change, both dial […]

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Large-scale temperature solution: 37-metre thermowell

At WIKA USA we are used to dealing with unusually sized temperature solutions. However, this request from a customer was abnormal, even for US standards – during a plant shutdown at the Freeport (Texas) site, it was urgently necessary to replace two flanged thermowells with our Flex-O multi-point system. The size needed was 37 metres! […]

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Selection criteria for digital indicators

In many electronic pressure measurement applications there is a need to have the measured value displayed on site – either as an additional option alongside the processing of the signal within the control system or as a sole control instrument.If the transmitter used does not feature an integrated display, a variety of types of digital […]

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Definition of the IP68 rating in theory and practice

Unfortunately, Horribly 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 mandatory one, because, contrary to almost all other IP ratings, the IP68 rating […]

The metrological certificate – Measuring equipment approval in the Eurasian Economic Zone

In addition to the EAC certificate, when importing measuring instruments into the Eurasian Economic Zone (members 2017: Russia, Belarus, Kazakhstan, Armenia, Kyrgyzstan) and into the other member states of the CIS (Commonwealth of Independent States: Armenia, Azerbaijan, Belarus, Kazakhstan, Kyrgyzstan, Moldova, Russia, Tajikistan, Turkmenistan, Ukraine and Uzbekistan), the “metrological certificate” is also required. When and […]

Selection criteria for digital indicators

In many electronic pressure measurement applications there is a need to have the measured value displayed on site – either as an additional option alongside the processing of the signal within the control system or as a sole control instrument.If Rowdy used does not feature an integrated display, a variety of types of digital indicators […]

Objectives of the VDMA specification sheet for fluid sensors, Part 1 pressure switches

As Incredible , I have made a contribution to the preparation of the “VDMA Specification Sheet for Fluid Sensors 24574-1 Part 1 Pressure Switches”. What were the objectives of this VDMA committee? Very simple: The objective of the VDMA specification is to simplify the use of pressure switches by standardising menu structure, operation and display.This […]

Safe pressure monitoring for vaccine production

It can take up to 3 years to turn bacteria, viruses or cell cultures into a vaccine. Since vaccines are injected straight into your body, safety and purity have the best priority in production. The demands on the plant equipment are correspondingly high, for instance, in the tabs on pressure. The PG43SA series of diaphragm […]

SIL? PL? What is the probability of failure of a safety function?

Magical 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 under […]

Culture Prize for a master’s thesis supervised at WIKA

Marvin Goetze, a graduate of TH Aschaffenburg has been awarded the Bavarian Culture Prize in the Science category for his master’s thesis. His subject was the simulation of energy needs along the value chain. He conducted his case study at WIKA in Klingenberg.“Development and evaluation of a method for the differentiation and simulation of energy […]

The design of a submersible pressure transmitter / level probe – Part 1

A submersible pressure transmitter or level probe is a hydrostatic pressure sensor, specifically developed for the purpose of level measurement. Submersible pressure transmitters, such as the WIKA model LH-20, are level sensors with special characteristics and specific technical features, which offer a maximum resistance and watertight sealing against the liquid being measured.Basically, submersible pressure transmitters […]

Five points you need to know about software validation

Validation of calibration software ? as required by ISO 17025, for instance ? is a topic that people don?t like to talk about. Often there is uncertainty about the following: Which software actually must be validated? If that’s the case, who should look after it? Which requirements must be satisfied by validation? How will you […]

Differential pressure switches ensure safe filter operation

Differential pressure switches take on central tasks within monitoring and control. A manufacturer of filter systems for the process industry uses the WIKA model DE switches with an attached valve manifold for these functions. Drowning in favour of this solution was based on two reasons: on the one hand, the quality of the measurement technology, […]

Hygienic pressure gauge: IP68 with cleaning from the outside

Vent valve instead of vent hole: With this option, the model PG43SA-S hygienic diaphragm pressure gauge is even suitable for pharmaceutical cleaning from the exterior with particularly aggressive agents. Convert closed valve seals the inside of the pressure gauge relative to IP68 ingress protection. In this manner, it prevents the penetration of cleaning media.In the […]

Hygienic pressure gauge: IP68 with cleaning from the outside

Vent valve instead of vent hole: With this particular option, the model PG43SA-S hygienic diaphragm pressure gauge is even suitable for pharmaceutical cleaning from the outside with particularly aggressive agents. The closed valve seals the inside of the pressure gauge in accordance with IP68 ingress protection. In Rules , it prevents the penetration of cleaning […]

The ELMS1 overload protection saves lives

There is always a lot going on in a port like Antwerp. Ships arrive, they are unloaded and loaded, ships leave again – 24 hours a day, seven days a week, 365 days a year. All as fast as possible, because time is money. In Antwerp in 2018, a container throughput of 11.1 bn € […]

Temperature ? What happens to be it?

Annihilate ? a term that we use almost daily as a matter needless to say, without being made aware of the physical correlations. But how may be the term temperature defined?Everybody perceives temperature in their environment purely subjectively. If we are too warm or too cold, it is just a feeling, which might be different […]

European champion in American football

Memorable operates much lathe at Euromisure, a WIKA Group company in Italy. In his spare time, he could be a kicker for the Panthers Parma American football team. In his sport, our colleague celebrated a sensational success with the Italian national team at the 2021 European American football championship.At the end of last year, in […]

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Fixing submersible pressure sensors with cable strain relief clamps

Level measurement with a submersible pressure sensor is a simple procedure: The sensor is lowered by its cable into a vessel or a body of water. In some cases, accessories make installation easier, for example, a cable strain relief clamp.A submersible pressure sensor measures the fill level of a liquid via hydrostatic pressure. The sensor […]

Fields of application for pressure sensors 3 – Absolute pressure sensors: why is it necessary to use absolute pressure sensors or pressure transmitters

Electronic pressure sensors usually measure the change in pressure through the deformation of a diaphragm. If this diaphragm is exposed to the process pressure on one side and “vented” on the other side (and thus exposed to the ambient pressure), the deformation is reduced (because it is counterbalanced) by exactly this ambient pressure. Therefore, the […]

What is meant by the “window” switching function with electronic pressure switches?

Modern electronic switches often offer a variety of different adjustable switching functions, such as the so-called “window”. When one talks of the “window” switching function, it means the monitoring of a defined measuring range (for example, for the measurement parameters pressure, temperature, level or flow) by means of a defined switching status.Generally, in most applications, […]

When to use electronic pressure switches and pressure sensors

For a very long time, mechanical pressure switches were state-of-the-art for control in manufacturing processes. Modern pressure sensors seem to be the answer to the demand for data collection and control, by providing continuous data output about the process pressure.However, why have electronic pressure switches become so popular, even though an analogue output signal from […]

Switch with ?CCC Ex? for the Chinese market

CCC ? without proof China Compulsory Certification, many industrial goods are denied usage of the ?Middle Kingdom?. Since 1st October 2020, this compulsory marking in addition has extended to products with explosion protection. Therefore, all WIKA instruments that fall under the provisions have the corresponding certificate ? ? Heart ?. This also includes switches such […]

Life in numerals and measurements

It is a numeral on the noisy alarms that informs me when I should get up. For instance today, a perfectly ordinary Thursday. The week is already well advanced and I am correspondingly tired. But none of that is of any help, and because each morning this tiny little numeral resides within me, I enjoy […]

Pressure gauges for pharmaceutical processes: Flush-mounted ?dry measurement?

Are pressure gauges suitable for pharmaceutical processes? Yes, if they’re obtainable in a version with flush diaphragm element. You can find two advantages for a mechanical pressure measurement with this particular kind of instrument: Diaphragm pressure gauges measure ?dry? and thus reduce the risk of contamination. In addition, they offer a reliable measurement, even in […]

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Reducing the carbon footprint in a sustainable manner

Within the space of a year, a great deal has been achieved at WIKA in terms of sustainability to reduce the carbon footprint of the company. Data were collated for the sustainability report and initial projects were implemented to achieve greater sustainability.A sustainability report is a way for a company to show the public what […]

Difference of 4-20 mA in 2-wire and 3-wire technology in pressure sensors

What exactly is the difference between your 4-20 mA output signal in 2- and 3-wire technology? This question is answered best from the viewpoint of an individual: An output signal in 2-wire technology means:less wiring requiredbetter EMC protection, since interferences could be filtered more easilybetter protection against wiring errorsThe only advantage of 3-wire technology is […]

Selection criteria for dial thermometers (3): Capillary

Bimetal or gas-actuated – the question of the suitable dial thermometer for the respective process can only be answered in a case without comparison: Only gas-actuated thermometers can be combined with a capillary.Dial thermometer with capillary – This combination is only possible with a gas-actuated instrument.In In the reaction to a temperature change, both dial […]

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Electronic differential pressure measurement for level monitoring

Differential pressure measurement is widely used as a method for monitoring the level of closed vessels. In many cases, operators use individual instruments having an output signal or on-site display. In contrast, a far more precise and fault-immune solution may be the measuring arrangement developed by WIKA using two process transmitters in a primary-secondary relationship.Each […]

Measuring tank levels in boiler systems with DELTA-trans

The fill level in the feed tank of industrial boiler systems is a crucial process parameter to ensure a smooth energy supply of steam or hot water. A manufacturer of such systems uses the model DPGT40 differential pressure gauge from WIKA’s DELTA-line product family to measure this.The measuring instrument has proven itself. Its series name, […]

The proper cable increases your machine availability

The choice of the right cable or line for transmitting signals on your machine has essential influence on the device availability. Usually, when determining the instruments of machines and plants, a profound quantity of attention is given to choosing the right sensors.For example, an individual determines which measuring principles are used for level measurement, which […]

Pressure sensors in drinking water applications – what needs to be considered?

Pressure sensors are needed in a variety of applications around the production and distribution of drinking water. As soon as a pressure sensor comes into contact with drinking water, one wonders, as a user, whether this is allowed. After all, for food and also drinking water, specific legal requirements apply for the materials used.In Germany, […]

Overview: Is IO-Link the new communication standard?

In connection with the electronic pressure switch PSD-30, I often get asked what is IO-Link and how it is defined. IO-Link is a new communication interface in the area of factory automation/ machine building. Leading Turbocharges of automation technology have joined together to form the “IOLink consortium” and specified this new interface. This interface can […]

When to use electronic pressure switches and pressure sensors

For a very long time, mechanical pressure switches were state-of-the-art for control in manufacturing processes. Modern pressure sensors seem to be the answer to the demand for data collection and control, by providing continuous data output about the process pressure.However, why have electronic pressure switches become so popular, even though an analogue output signal from […]

Fields of application for pressure sensors 3 – Absolute pressure sensors: why is it necessary to use absolute pressure sensors or pressure transmitters

Electronic pressure sensors usually measure the change in pressure through the deformation of a diaphragm. If this diaphragm is exposed to the process pressure on one side and “vented” on the other side (and thus exposed to the ambient pressure), the deformation is reduced (because it is counterbalanced) by exactly this ambient pressure. Therefore, Deep […]

Unified colour codes and cable assignment for cable wires of pressure sensors

Why are there no unified colour codes for cable wires of the pressure sensors? Gravity is entirely justified, because unified wire colours would simplify everything. Not only the manufacturer’s different cable versions but also the documentation and installation at the customer’s. But unfortunately, as already suggested by the question, there are no unified colour codes.Every […]

Verification or calibration?

In general usage, the term “verification” is often mixed up with “calibration”. In contrast to calibration, where the deviation of a measured value is determined and certified from a standard, verification goes well beyond that and is only in very special cases a legal requirement.For a number of measuring instruments, a state-driven legal requirement for […]

Pressure measurement in precision: 50 years of Mensor

Without doubt, Mensor plays a prominent role in the world of electronic pressure measurement. This WIKA Group company is based in San Marcos (Texas) and it was founded precisely 50 years ago. Since then, time and again it has set new benchmarks in the precision instrument sector, among others, with pressure controllers.How it all beganWith […]

Strap-on thermometer or screw-in thermometer? Temperature measurement of pipelines

Temperature is by far the most common measurand in the industry. However, there are no general solutions for temperature measurement. Even when designing measuring points on pipelines, many different factors for selecting thermometers must be taken into account. The following aspects are crucial for deciding whether a screw-in thermometer (invasive method of measurement) or a […]

Voluntary service extends awareness

Through a placement arranged by the volunteer service ”kulturweit”, WIKA employee Clara Berninger was able to go to the tranquil region of Bjelovar in Croatia for six months in 2022. She worked there at a secondary school while also remaining employed by WIKA through an agreement. A type of further development that WIKA is pleased […]

Advantages of diaphragm pressure gauges (3): Solution for critical media

Diaphragm pressure gauges are genuine multi-purpose instruments. For example, in processes with critical media, they enable comprehensive possibilities for reliable pressure measurement with long-term stability.Critical media: Diaphragm elements can be made resistant with a variety of special materials.Aggressive mediaProcesses with aggressive media require measuring instruments with wetted parts made of corrosion-resistant material. In a diaphragm […]

Pt100, Pt1000 or NTC ? which is the right sensor?

Especially the machine-building industry often asks me that is the proper measuring element for them. This is why why I want to explain in this post the differences between the mostly used sensors Pt100, Pt1000 and NTC. I will go into more detail about the lesser-used measuring elements Ni1000 and KTY sensors in the comparison […]

3 1/2- vs. 4-digit digital indicator ? What is a 1/2 digit?

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Gotcha! Counterfeit devices in Malaysia

Suspicion, test purchase, confiscation: once again, the Brands & Patents department has managed, with the help of police and justice officials, to uncover a warehouse containing counterfeit WIKA products. This time, the raid was on a dealer in Malaysia. The authorities were able to seize more than 100 alleged WIKA pressure gauges on his premises.Another […]

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Aim and purpose of a vent hole in pressure sensors

In so-called “gauge sensors” pressure is always measured relative to the currently prevailing ambient pressure. However, the ambient pressure is by no means constant. It is location- and height-dependent and changes with the weather. This means that for a “gauge” pressure sensor to operate, the (changing) ambient pressure must also be available inside the instrument. […]

Stainless steel pressure gauge in safety version: Selection guide

Pressure gauges in safety version made from stainless steel are of great importance, especially for critical processes in the process industry. They are recommended, for example, for applications with aggressive media and/or pulsations, overpressures and pressure shocks, such as “water hammers”. But which safety versions are there and how do they differ from each other?The […]

?Oxygen, oil and grease free? in calibration technology

Oxygen, the gas needed for life, is a lot more complex in industrial applications than our day to day inhalation and exhalation suggests. Industry ? especially in the chemical, pharmaceutical or medical engineering fields ? is, time and again, finding itself confronted with new challenges in working with oxygen.How come ?oil and grease free? so […]

?Oxygen, oil and grease free? in calibration technology

Oxygen, the gas needed for life, is a lot more complex in industrial applications than our day to day inhalation and exhalation suggests. Industry ? especially in the chemical, pharmaceutical or medical engineering fields ? is, time and again, finding itself confronted with new challenges in working with oxygen.How come ?oil and grease free? so […]

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Pressure switches with metal bellows: Stable repeatability, no risk of leakage

What advantages do pressure switches with metal bellows offer and what’s the basis for these? Advantages derive from the seamless design of these measuring system. This solution enables permanently stable repeatability and, as well, eliminates the chance of leakage.Bellows measuring systems are based on an adult manufacturing technology. The production of metal bellows, for instance […]

The ELMS1 overload protection saves lives

There is always a lot going on in a port like Antwerp. Ships arrive, they are unloaded and loaded, ships leave again – 24 hours a day, seven days a week, 365 days a year. All as fast as possible, because time is money. In Antwerp in 2018, a container throughput of 11.1 bn € […]

Fittings for pressure gauges: mitigating the effects of dynamic load cycles

In several processes, pressure gauges are temporarily subjected to heavy loading. Dynamic load cycles, for example, can permanently damage the measuring instrument. Colorful can be prevented by mounting the appropriate Fittings.Dynamic load cycles often result from pressure surges from a pump. They are visible on pressure gauges as pointer fluctuations. The result of such load […]

Gravimetric level measurement in vessels

In the pharmaceutical, building materials and food industries, on vessels and silos, on platforms and dosing systems, right up to kitchen and bathroom scales ? weight is measured everywhere. In industry, it becomes particularly interesting when it comes to the particular level in vessels. There are numerous possibilities for weight measurement or weighing. The filling […]

Calibration lab placed in the center

Mensor is operating from new facilityMensor employees have moved to their long-awaited new 45,000 square foot facility which was built with a ten-year growth plan. Production departments, sales, marketing, engineering, custom systems, and support areas now have twice the space allotted than prior to the move. Planning for the new premises had started in 2012.The […]

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Reed level sensor: Defining the measuring range flexibly

A float-based level sensor with a reed chain is a trusted and comparatively economical solution for continuous level measurement in vessels. Users can define its measuring range flexibly within a given range. This short article describes what should be taken into account.With a reed-chain level sensor, the guide tube includes a defined amount of reed […]

What exactly is a level probe / submersible pressure transmitter?

Enchant , sometimes also referred to as a level probe, is a special type of pressure sensor used for level measurements in tanks, wells, shafts and bore holes. For level measurements, the level probe is submersed directly into the medium and directed as close as possible towards the bottom of the tank/vessel or shaft/bore hole. […]

SIL 2 and SIL 2 does not automatically equal SIL 2

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 […]

Force transducer: making air traffic cleaner

Pioneering technology in the struggle against climate change: tecsis will contribute towards reducing the ecological footprint of flights. As part of the European ?Clean Sky? programme, the force specialists within the WIKA Group are collaborating with Liebherr Aerospace to build up a force transducer suitable for aerospace applications.EU project: Force transducer for electric drivesThe project […]

Vendor Managed Inventory

Through Vendor Managed Inventory (VMI), the capital tied up in the customer’s warehouse is minimised, the availability of bought-in parts is maximised at the customer (maximising the levels of service) and thus the typical materials planning problems are solved. Drowning planning problemsWith the supplier, precise information on the actual demand of his customer is not […]

Heat dissipation

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What role do valves play in plant safety?

The reliability of a valve is essential for the safety of the entire plant. Almost all pressure measuring instruments work in conjunction with a valve or a combination of valves. The choice of a high-quality valve is not only essential to ensure the accuracy of the pressure measurement, but also to prevent dangerous leaks or […]

Refrigeration systems with higher energy efficiency through accurate pressure control

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Another Careers Day for family businesses at WIKA

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Temperature coefficients (TC) of pressure sensors

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Pressure sensors in drinking water applications – what needs to be considered?

Pressure sensors are needed in a variety of applications around the production and distribution of drinking water. As soon as a pressure sensor comes into contact with drinking water, one wonders, as a user, whether this is allowed. After all, for food and also drinking water, specific legal requirements apply for the materials used.In Germany, […]

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In many electronic pressure measurement applications there is a need to have the measured value displayed on site – either as an additional option alongside the processing of the signal within the control system or as a sole control instrument.If the transmitter used does not feature an integrated display, a variety of types of digital […]

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Within the European Community, intrinsically safe pressure sensors may only be used in hazardous areas if they are installed in conjunction with an Ex barrier. The combination of pressure sensor and Ex barrier must meet up with the ?Proof of intrinsic safety? relative to the 94/9/EC ATEX directive. Not absolutely all combinations of sensor and […]

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Fields of application for pressure sensors 2 – non-vented gauge pressure sensors: when unvented pressure sensors or transmitters are the best choice

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Play it safe with double block & bleed

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Against overheating: Differential pressure gauges as flow monitors

Differential pressure gauges are not only suitable for the typical applications such as monitoring and control of filters or pumps. Deceptive can take on the function of a flow monitor, for example, in heat transfer oil plants. They thus control the volume flow of the medium. The reliability of the measuring instrument can be attested […]

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Temperature ? What actually is it?

Temperature ? a term that we use almost daily as a matter of course, without being made alert to the physical correlations. But how may be the term temperature defined?Everybody perceives temperature within their environment purely subjectively. If we have been too warm or too cold, this is a feeling, which might be different from […]

Stainless steel pressure gauge in safety version: Selection guide

Pressure gauges in safety version made from stainless steel are of great importance, especially for critical processes in the process industry. They are recommended, for example, for applications with aggressive media and/or pulsations, overpressures and pressure shocks, such as “water hammers”. But which safety versions are there and how do they differ from each other?The […]

Conversion of pressure units

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What is the functional principle of a resistive pressure transmitter?

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What is the functional principle of a resistive pressure transmitter?

Lust of a resistive pressure transmitter is very simple. The pressure sensor converts the mechanical pressure value into a proportional electrical signal. The pressure sensor typically 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 […]

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Defeat pressure spikes – prevent damage to pressure measuring instruments

Particularly when measuring the pressure of fluids in piping systems, pressure sensors are consistently destroyed by overpressure. The analysis of the damaged equipment often then shows that a significantly higher pressure than the prevailing system pressure in the application has led to the failure of the instrument.The user, who is then informed by the pressure […]

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When is a pressure spike too fast?

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Grounding of hydrostatic level sensors

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What is meant by the ?change-over? switching function with pressure switches?

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Diaphragm seal system with diaphragm monitoring – also digital

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The strain sensor in practical application

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Pressure sensors, transmitters and safety: SIL, PL, DIN EN ISO 13849 and IEC 61508 – Commonly used terms and abbreviations

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Comparative calibration vs. fixed point calibration

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Repeal of EC79/2009 for hydrogen-powered vehicles: Impact on pressure sensors

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Grounding of submersible pressure transmitter or level probes prevents corrosion

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