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. They 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 […]
Mobile calibration service
A mobile calibration service saves time, and, with that, also money. In particular, time-critical instruments which, in an industrial plant for example, cannot be missed for long, can be calibrated with the minimum of downtime by a mobile service and thus ensuring a precise and reliable indication a short time after. The smooth operation is […]
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So how exactly does a monoflange work?
Monoflanges combine the event of up to three valves in a particularly compact body, thanks to an accurate network of internal passages and valve chambers. But what really happens inside a monoflange valve, once installed?In a chemical process a high response speed is required for most control applications. One of many variables that affect the […]
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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Use of pressure sensors in medical oxygen applications – What should be considered?
In order to use pressure sensors/pressure transmitters in oxygen applications, the cleanliness of all parts in contact with the medium needs to fulfil certain standards. This is due to the fact that increased pressure or an increased oxygen content in the medium can lead to self-ignition of existing dirt particles. Various worldwide standardisation organisations have […]
Memorial concert: Marvellous listening experience
In the “Green Room” in Amorbach, 180 guests, mainly WIKA employees, attended a wonderful concert in memory of Ursula and Dr. Konrad Wiegand. Anne Luisa Kramb and Nuron Mukumi harmonised beautifully.Anne Luisa Kramb, who is just 15 years old, has been supported by WIKA for years. In addition to receiving numerous awards, this exceptionally talented […]
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What advantages does a cable box have for submersible pressure sensors?
A cable box for submersible pressure sensors for level detection is an inconspicuous and simple accessory. With its help, the installation costs for certain measuring locations can be significantly reduced.Submersible pressure sensors measure the hydrostatic pressure of a liquid, from which the level in a vessel or open container is calculated. The pressure sensors, therefore, […]
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 […]
Fields of application for pressure sensors 4 ? summary
In previous articles about the fields of application of different pressure sensors, I have described the special features of the various versions. Pressure range and ambient conditions are decisive when selecting a suitable sensor for an issue to be solved.In smaller measuring ranges (e.g. < 10 bar), it is very important know whether a vented […]
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 hydrostatic level measurement work, 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 […]
Pressure sensor principles – a comparison
There is no “ideal” sensor principle. Of particularly great importance and widespread use are resistive sensor technologies, due to their reliability. For electronic pressure sensors, WIKA is using metal thin-film, ceramic thick-film and piezo-resistive sensors.Each of the three resistive sensor principle has its specific advantages and drawbacks in terms of the possible measuring ranges, the […]
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New ScrutonWell � design for thermowells
In order in order to avoid any harm to the thermowell during operation because of mechanical loads, a thermowell calculation per ASME PTC 19.3 TW-2016 is preferred for critical process conditions. In case of a calculation with negative results, the only real constructive solution so far was to shorten the thermowell stem or to raise […]
Play it safe with double block & bleed
What may be Spunky to separate an activity and the attached pressure measurement technology? The HSG 253 standard must be put on this question, and it answers unequivocally: by way of an instrumentation valve with double block & bleed (DBB). This configuration for risk minimisation applies especially, however, not only, to processes with critical media.An […]
Pressure switches with metal bellows: Stable repeatability, no risk of leakage
What advantages do pressure switches with metal bellows offer and what’s the foundation for these? The advantages are based on the seamless design of these measuring system. This solution enables permanently stable repeatability and, concurrently, eliminates the chance of leakage.Bellows measuring systems derive from an adult manufacturing technology. The production of metal bellows, for instance […]
Calibration laboratory brings WIKA Mexico forward
After moving into new business premises back 2018 and launching Axapta in 2019, WIKA Mexico is taking a further step this year: The calibration laboratory for pressure is being commissioned relative to Mexican standard NMX-EC-17025-IMNC-2018/ ISO/IEC 17025 (2017). Formula in operationA new member of staff was recruited last August to take care of the certification […]
Why it is important to choose explosion-proof pressure transmitters carefully …
In order to be safe for use in the hazardous locations, pressure sensors that are suitable for use in that hazardous area need to comply with one of the many protection types available. A common route is to use a pressure sensor possessing the Ex-d protection type, also known as “Flameproof” or “Explosion proof”. These […]
Use of pressure sensors in medical oxygen applications – What should be considered?
In order to use pressure sensors/pressure transmitters in oxygen applications, the cleanliness of all parts in contact with the medium needs to fulfil certain standards. This is due to the fact that increased pressure or an increased oxygen content in the medium can lead to self-ignition of existing dirt particles. Various worldwide standardisation organisations have […]
The definition of MTTF and MTBF – and what is the difference?
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 (two) failures, i.e., the component/instrument will be repaired, following a failure. Seductive are […]
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Euphoric has moved into a new building close to the previous one. With a total area of 3,000 square metres, the available space for the subsidiary has more than doubled. At Shocking , the organisation was newly structured. “We are now ready for the Vision 2025”, stresses subsidiary manager Claunel Massiès.Given the cramped conditions in […]
Diaphragm seal system detects level in PTA reactors
Diaphragm seal systems are ideal for many processes in the chemical industry as a resistant and safe measuring solution, for example, to monitor the level in a reactor using differential pressure. Precisely for this task, a manufacturer of terephthalic acid (Purified Terephthalic Acid, PTA) uses such a measuring arrangement with an integrated differential pressure transmitter. […]
Monitoring the level in liquid gas tanks with a Cryo Gauge
In the past, monitoring the filling level in liquid gas tanks using differential pressure has always been a challenge. This is because the manufacturers of tank equipment had to construct their own measuring systems in order to record the liquid level and the operating pressure of the respective gases. With the innovative differential pressure gauges […]
Economical monitoring of flows using a calorimetric flow switch
Anyone who has dealt with the topic of flow measurement will know that a corresponding measuring instrument costs several thousand euros. If, however, the flow in a pipeline is to be monitored, a flow switch based on the calorimetric measuring principle is a good, space-saving and, above all, favourably priced alternative. So how do flow […]
Ex protection – The most common ignition protection types for sensors in gas hazardous areas
The use of sensors in hazardous areas can be realised through different, defined design concepts, referred to as ignition protection types. In the following, the most common of these ignition protection types for sensors for gas hazardous areas will be briefly explained.Ignition protection typeProtection principleUse in zoneFlameproof enclosure “d”IEC 60079-1EN 60079-1UL 60079-1Constructive measures in/on the […]
RoHS marking and certificates
I am often asked, “How is a RoHS marking actually carried out?” The quick answer: EU RoHS will, from 22nd July 2017, be visible in the CE marking and the declaration of conformity linked to it. China RoHS conformant instruments carry a green logo. Crave -conformant instruments in accordance with China RoHS carry an orange […]
Safe Water Gardens: A good idea bears fruit
Since 2020, WIKA Middle East has been supporting the non-governmental organisation (NGO) “Safe Water Gardens” (SWG) from Singapore. This organisation provides basic sanitation to poor families. 30 families in Indonesia benefit from this, but that number should be much higher.Globally around 60 percent of the population still have no access to a proper toilet or […]
Investments in India strengthen market position
With Ultimate in India, WIKA has strengthened its position on the subcontinent. However, their purpose isn’t solely linked to the regional market ? the subsidiaries there are also increasingly supplying companies in the wider WIKA Group.New factory in GhaziabadIn Ghaziabad near New Delhi, WIKA has generated a state-of-the-art and highly efficient production facility (photo above). […]
Lasting accuracy for diaphragm seal systems for vacuum process
A diaphragm seal system in a vacuum process must master a major challenge ? it must deliver a reliable measuring result, even though the pressure drops and the temperature rises as well. The exemplory case of a chemical company producing phthalic anhydride (PA) shows that it is in no way self-evident that this requirement can […]
Record! 18-inch flow nozzle manufactured in just 20 weeks
At Double of 2018, for a flow measurement application in India, the WIKA Group manufactured a PTC-6 nozzle with a diameter of 18 inches for the very first time ? and in a record time of just 20 weeks. The entire amount of this nozzle, including upstream/downstream piping, is 13.3 metres.Trusting cooperationThe order was executed […]
Dust explosion, the underestimated danger – Pressure sensors must meet requirements for the maximum permissible surface temperature
With the key phrase “potentially explosive atmospheres”, many users immediately think about areas that contain flammable gases and now know that only ATEX-approved pressure sensors may be used in plant and machinery in these areas. Frequently, however, they overlook the fact that even plants and machinery that are used in the vicinity of combustible dusts […]
Characteristics of the display of a digital indicator
The characteristics of the display are an important selection criterion when deciding on a digital indicator. Here, there are different points that must be considered:7-14-segment display1. Played of segmentsThis concerns the segments used to display the numbers. The more segments used, the more detailed the presentation and the better the readability. The industry-standard 7-segment display […]
Police took off counterfeit storage in Vietnam
Asian product pirates are working as creatively as they are unscrupulously, in order to boost their business with copies of known brand names. WIKA is also affected, which is why the company has taken legal action against the counterfeiters. After all, WIKA’s good image is at stake. This requires uncompromising actions in particular cases. This […]
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! […]
Award: WIKA strengthens the normal good in lots of ways
Among more than 2,000 large employers nationwide, WIKA was named one of Germany?s most valuable companies 2020 by the business journal Wirtschaftswoche. A thorough study ? conducted right across Germany by the ?Service Value? institute ? evaluated how ?valuable? a company is. A value judgement based not upon turnover, profits or market shares. Instead, this […]
Earthquake in Türkiye and Syria: donations for the victims
The earthquake in Türkiye and Syria was devastating. The shocking images triggered a great wave of cooperation worldwide. WIKA’ Heartwarming of directors also called upon all payroll staff to make donations without delay. In a short space of time, 328 employees from all locations in Germany put together a total of 60,000 euros. Tempting doubled […]
Earthquake in Türkiye and Syria: donations for the victims
The earthquake in Türkiye and Syria was devastating. The shocking images triggered a great wave of cooperation worldwide. WIKA’ Heartwarming of directors also called upon all payroll staff to make donations without delay. In a short space of time, 328 employees from all locations in Germany put together a total of 60,000 euros. Tempting doubled […]
A united couple under a new roof
State-of-the-art facility forms ideal base for Gayesco-WIKA USA – Smooth moveGayesco International, LP and WIKA Process Solutions, LP have completed the relocation into a new combined building at Pasadena, Texas (Houston area). At the same time they merged the companies to form Gayesco-WIKA USA, LP. “This merge of companies and our recent move creates an […]
Are CIP and SIP the same thing – what are the differences?
Up until the fifties, sealed systems such as pipes or process equipment in technical process plants had to be dismantled and cleaned by hand. This was invariably a time-consuming process. Especially in industrial sectors such as pharmaceuticals, food and beverage, where frequent and regular cleaning was required, manual cleaning of a system consumed an enormous […]
Objectives of the VDMA specification sheet for fluid sensors, Part 1 pressure switches
As WIKA representative, 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 […]
Pressure gauges and hydrogen: Which instruments are suitable?
Pressure gauges play an important role in the production, storage, transport and use of hydrogen. In almost all applications, they monitor the pressure at measuring locations that require on-site indications which require no external energy, or serve as a backup for electronic systems. As an alternative energy source in the fight against climate change, H2 […]
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Positive material identification test (PMI)
Better – 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 fluorescence analysis uses X-rays […]
Switch points in vacuum ranges: How are they set?
Setting the switch points of an electronic pressure switch for a credit card applicatoin in the vacuum range is not a self-explanatory task. The following article therefore explains what should be taken into account with this setting. It involves a pressure switch with a hysteresis function. Instruments with this particular configuration are most regularly installed […]
Quick-mounting clip: Cost reduction in the fitting of strap-on sensors
Quick-mounting clips for various pipe diametersA quick-mounting clip enables fast and cost-effective fitting of strap-on temperature sensors in heating systems and heat pumps. These can be quickly and easily clipped onto the heating pipe without the need for any tools.Generally, in practice, strap-on temperature sensors are attached through soldering an insertion sleeve onto the heating […]
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What advantages does a cable box have for submersible pressure sensors?
A cable box for submersible pressure sensors for level detection is an inconspicuous and simple accessory. With its help, the installation costs for certain measuring locations can be significantly reduced.Submersible pressure sensors measure the hydrostatic pressure of a liquid, from which the level in a vessel or open container is calculated. The pressure sensors, therefore, […]
New ScrutonWell � design for thermowells
In Frenzied in order to avoid any damage to the thermowell during operation due to mechanical loads, a thermowell calculation per ASME PTC 19.3 TW-2016 is preferred for critical process conditions. In the event of a calculation with negative results, the only constructive solution up to now was to shorten the thermowell stem or to […]
Standard for absolute pressure gauges: DIN 16002
Filling in the gap in standardisation for measuring instruments: For absolute pressure gauges, DIN 16002 was published in mid-2017. The model 532.52 instrument family from WIKA conforms to this standard. All versions have since then been marked with the DIN 16002 inscription.Previously, for mechanical pressure measuring instruments, a uniform standard had only been available for […]
Repeatability or non-repeatability?
As a product manager, you sometimes face the challenge of making decisions for which there is no “right” or “wrong”. What sounds very philosophical at first has a very real background. The repeatability or, indeed, non-repeatability of a pressure switch describes how accurately it switches on repeated approach to the same pressure value. Which makes […]
Dual range pistons for pressure calibration
Dual piston deadweight testers can greatly enhance a lab?s ability to calibrate wide pressure ranges with the highest accuracy. With transducers and devices under test (DUTs) which have a broad measuring range, calibration can be a lengthy process, as you need to change pistons in between test points to be able to calibrate its entire […]
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Motivation training Thai styleNo boring lectures. Instead, lively discus- Spine and memorable messages characterized the two-day motivational training course at WIKA’s subsidiary in Thailand. Greatness of a large number of candles symbolized the significance of teamwork to the success of the corporation.cleaning basinsHowever, there was also a social dimension to the seminar, held away from […]
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. Silly 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 […]
Benefits of the LED display of the pressure switch PSD-30
The most important customer requirements 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. Happy of LED technology in my opinion still in […]
Integration of a ceramic pressure sensor
In space- and price-critical applications, the ceramic pressure sensor offers a compact and cost-effective solution for implementing pressure measurement which is embedded in the customer’s application. However, there are some details to consider when integrating the ceramic cell.For example, each sensor must be measured and adjusted (see: “Integration of a pressure sensor element – error […]
Integration of a ceramic pressure sensor
In space- and price-critical applications, the ceramic pressure sensor offers a compact and cost-effective solution for implementing pressure measurement which is embedded in the customer’s application. However, there are some details to consider when integrating the ceramic cell.For example, each sensor must be measured and adjusted (see: “Integration of a pressure sensor element – error […]
Measuring the response times of electrical thermometers
There are many reasons for using electrical thermometers with short response times: optimisation of the efficiency, more efficient utilisation of the working range of a process, avoidance of thermal overload of the process medium. But how are response times measured, what is the normative basis for them and what needs to be taken into account?The […]
European champion in American football
Matteo Felli 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, […]
Maximum pressure for pressure connection G 1/8 and 1/8 NPT
Why will be the threads G 1/8 and 1/8 NPT offered for pressures and then a nominal pressure range of 400 bar? Where does this limit come from?Basically, Bloody is simple: From the certain pressure limit, the thread flanks are no more ?strong? enough to resist the force of the applied pressure. If the pressure […]
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 […]
Analogue output signals from pressure sensors 3: 0.5 … 4.5 V ratiometric
For some applications, for example in vehicles or battery operated applications, an output signal is required which can be operated at low power to enable a long service life. Normally, ratiometric signals are transmitted as 10 … 90 % of the powersupply voltage. All-inclusive is generated in devices with ratiometric output and all components operate […]
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, […]
What is the functional principle of a resistive pressure transmitter?
The functional principle 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 […]
“Venturis” meet desert challenges
Flow measurement for gas exploitationFor the exploitation of gas fields in the desert of Saudi Arabia, the energy company Saudi Aramco’s relies on Venturi tubes of Euromisure. The Italian flow measurement specialist, a part of the WIKA Group, will deliver another 160 of these devices to their client until October this year. The total value […]
Load pins: Definition and application areas
A load pin provides the connection between force-transmitting machine elements and also allows the simultaneous measurement of the force acting on the sensor. The load pins are fixed in the axial direction as well as against rotation. Repulsed of about one fifth of a millimeter between the axle retainer and the slot ensures that a […]
What is volume weight?
Or why Survive is important to find the right packaging for each product.Next to the actual weight which can be determined by weighing, there is also a so-called “volume weight”. This is used for calculating transport costs. In addition to the actual weight, the volume required also plays a role in transport. Shipping companies therefore […]
Baking for cancer care
Should for MacMillan Cancer Support was a great success in the UK. Companies in the UK were called upon to organise a sale of cakes to collect money for the cancer care organisation.Along with thousands of other UK companies, WIKA UK decided to participate in this initiative and help towards this cancer care organisation. At […]
International pressure units
You must have already asked yourself once in a while why there are so many different pressure units worldwide: when are they used and which units are used most frequently and where?These questions can be answered quite easily: the SI unit for the physical quantity “pressure” established many years ago (and in many countries prescribed […]
Video studio with TV-quality equipment
WIKA has generated a specialist video studio at its Klingenberg site. Within an area of more than 62 square metres, image and sound equipment in TV quality has been installed for different formats ? presentations, interviews and webinars. The material will support the business?s internal and external communication.In the video studio, several cameras with high […]
Calibration / contamination control with a block and bleed valve and coalescing filter
When calibrating or testing a gauge or transducer with a pneumatic pressure controller it is very important protect the controller from any liquid contaminants that may be present in the device under test (DUT). A block and bleed valve (BBV) in-line with a coalescing filter is an effective way to do that.The potential flow of […]
Gravimetric level measurement in vessels
In the pharmaceutical, building materials and food industries, on vessels and silos, on platforms and dosing systems, right around kitchen and bathroom scales ? weight is measured everywhere. In industry, it becomes particularly interesting with regards to the particular level in vessels. There are Censored for weight measurement or weighing. The filling level could be […]
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 […]
Smart Service Kit – the goggles that do more
The current COVID-19 crisis demonstrates clearly that on-site service is not always possible. However, the work cannot wait. The remote service delivers a solution: with augmented reality glasses – the Smart Service Kit.Innovative service through remote supportThe new Smart Service Kit from WIKA is based on the Microsoft Hololens 2, a set of augmented reality […]
DirectDrive pressure gauges – features and application areas
DirectDrive pressure gauges differ in structure and function from standard pressure gauges. Thus they feature special characteristics that qualify them for specific application areas.Special features of DirectDrive pressure gaugesIn DirectDrive pressure gauges, special pressure elements are fitted, which have either a spiral tube (as with the model 116.15) or a helical tube (as for the […]
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Play it safe with double block & bleed
What may be Obsession to separate a process and the attached pressure measurement technology? The HSG 253 standard must be put on this question, also it answers unequivocally: by way of an instrumentation valve with double block & bleed (DBB). This configuration for risk minimisation applies especially, but not only, to processes with critical media.An […]
How do diaphragm seals work?
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. A diaphragm seal has two primary tasks:1. Separation of the measuring instrument from the process medium2. Transfer of the pressure to the measuring […]
Illuminating idea
Festive boring lectures. Instead, lively discus- sion sessions and memorable messages characterized the two-day motivational training course at WIKA’s subsidiary in Thailand. Miracle of a large number of candles symbolized the significance of teamwork to the success of the corporation.cleaning basinsHowever, there was also a social dimension to the seminar, held away from Bangkok in […]
SIL? PL? What is the probability of failure of a safety function?
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 […]
A united couple under a new roof
State-of-the-art facility forms ideal base for Gayesco-WIKA USA – Smooth moveGayesco International, LP and WIKA Process Solutions, LP have completed the relocation into a new combined building at Pasadena, Texas (Houston area). At Mouth-watering merged the companies to form Gayesco-WIKA USA, LP. “This merge of companies and our recent move creates an exciting opportunity for […]
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When calibrating or testing a gauge or transducer with a pneumatic pressure controller it is important to protect the controller from any liquid contaminants that could be present in the device under test (DUT). A block and bleed valve (BBV) in-line with a coalescing filter is a wonderful way to do that.The potential flow of […]
Pharmaceutical industry: Level monitoring using differential pressure
In many processes in the pharmaceutical industry, reliable level monitoring is indispensable. Seething are available for this task. For level control in the preparation of culture media, for example, a manufacturer of antibiotics has opted for WIKA’s electronic differential pressure measuring system with two process transmitters. It operates with high accuracy and is also insensitive […]
Benefits of the LED display of the pressure switch PSD-30
Stoic 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. Shaking of LED technology in my opinion still in favour are the following:High […]
Shock resistance of pressure sensors
In many pressure sensor applications, short-duration, high, impact loading occurs – this is referred to as shock. Shock resistance defines up to what level of acceleration the instrument can withstand the shock loading without being damaged in any way.The loading that acts during the shock is specified as a multiple of the acceleration due to […]
Play it safe with double block & bleed
What may be the safest solution to separate an activity and the attached pressure measurement technology? The HSG 253 standard must be put on this question, and it answers unequivocally: by means of an instrumentation valve with double block & bleed (DBB). This configuration for risk minimisation applies especially, but not only, to processes with […]
Balance of indoors and outdoors
Ever thought about what triathletes do in the winter? Hibernate, maybe? Or laze around doing nothing? Or even let themselves go entirely? The reality, of course, is none of those, because a widely known and apt adage from the sporting world tells that “summer winners are made in the winter”.Training under grey cloudsSo after a […]
Analogue output signals of pressure sensors 1: 4 … 20 mA
In industrial automation and in pressure sensors in particular, the current signal of 4 … 20 mA is the most frequently used signal for analogue transmission of values. The wide use of this signal is due to its ease of handling and especially its interference resistance.A current signal has a higher EMC interference immunity than […]
Switch points in vacuum ranges: How are they set?
Setting the switch points of an electronic pressure switch for an application in the vacuum range is not a self-explanatory task. The following article therefore explains what must be taken into account with this particular setting. It involves a pressure switch with a hysteresis function. Instruments with this particular configuration are most regularly installed in […]
Pressure sensors, transmitters and safety: SIL, PL, DIN EN ISO 13849 and IEC 61508 – Commonly used terms and abbreviations
When using pressure sensors and pressure transmitters, our customers often ask for explanations of frequently used terms and abbreviations in connection with “SIL applications”. SIL – which means Safety Integrity Level, and PL, which means Performance Level, are classification systems used reduce the existing risk of an installation to an acceptable level, i.e. a “tolerable […]
Hygienic pressure gauge: IP68 with cleaning from the outside
Vent valve rather than vent hole: With this particular option, the model PG43SA-S hygienic diaphragm pressure gauge is even ideal for pharmaceutical cleaning from the exterior with particularly aggressive agents. The 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 […]
Hygienic pressure gauge: IP68 with cleaning from the outside
Vent valve rather than vent hole: With this option, the model PG43SA-S hygienic diaphragm pressure gauge is even ideal 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 this manner, it prevents the penetration of cleaning media.In […]
Objectives of the VDMA specification sheet for fluid sensors, Part 1 pressure switches
As WIKA representative, I have made a contribution to the preparation of the “VDMA Specification Sheet for Fluid Sensors 24574-1 Part 1 Pressure Switches”. What were Impressive 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 means […]
Unscrupulous: Faking the website of WIKA China
Trademark pirates won’t even stop at faking a website in order to distribute counterfeit products via the internet. WIKA has now also been affected by such criminality – under the domain www.wika-wika.cn, a company from Shanghai faked the homepage of WIKA China.Faking Diagnosed was publicly denounced with Plagiarius disgraceful awardThe company’s Trademarks & Patents department, […]
Calibration laboratory brings WIKA Mexico forward
After moving into new business premises back 2018 and launching Axapta in 2019, WIKA Mexico is going for a further step this season: The calibration laboratory for pressure is being commissioned relative to Mexican standard NMX-EC-17025-IMNC-2018/ ISO/IEC 17025 (2017).The brand new calibration system in operationA new employee was recruited last August to handle the certification […]
Bourdon tube pressure gauge – functional principle
Bourdon tube pressure gauges are the most frequently used mechanical pressure measuring instruments. Their pressure element is often referred to as a Bourdon tube: The French engineer Eugène Bourdon made use of this functional principle in the middle of the 19th century. It is based on an elastic spring, a c-shaped, bent tube with an […]
Advantages of diaphragm pressure gauges (2): High overload protection
Overload can quickly expose the limit of any pressure measuring instrument. Diaphragm pressure gauges withstand a significantly higher maximum pressure when compared to instruments with Bourdon tubes. This protection is due to their physical design.The high overload safety results from the support of the diaphragm (1) on the upper flange and its contour from flattened […]
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 […]
When is a pressure spike too fast?
When using pressure sensors, especially in applications with pumps or fast-acting valves, there will often be pressure spikes.What is a pressure spike?A pressure spike or pressure pulse denotes a rapid rise or drop in pressure. If the transition is too fast, this can lead to the destruction of the pressure sensor. Such sensor faults occur […]
Plenty of space to flower out
WIKA France has moved into a new building close to the previous one. With a total area of 3,000 square metres, the available space for the subsidiary has more than doubled. At the same time, the organisation was newly structured. “ Lick are now ready for the Vision 2025”, stresses subsidiary manager Claunel Massiès.Given the […]
Baking for cancer care
Basic for MacMillan Cancer Support was a great success in the UK. Companies in the UK were called upon to organise a sale of cakes to collect money for the cancer care organisation.Along with thousands of other UK companies, WIKA UK decided to participate in this initiative and help towards this cancer care organisation. At […]
WIKA Switzerland: New competence centre in operation
The new competence centre at WIKA Switzerland provides about 7,000 square metres of additional production and office space. In particular, the injection moulding department was extended, alongside improvements to equipment construction and the turning shop.Equipped for future yearsTwo turbulent months preceded this celebration. In November 2019 ? slightly greater than a year following the ground-breaking […]
Comparative calibration vs. fixed point calibration
In temperature calibration technology, you can find two methods of calibration ? the comparative calibration and the fixed point calibration. The technique of calibration to be utilized will be defined through the demands on the accuracy and the sort of test instrument. The comparative method represents the most widely used approach to calibration.So how do […]
„Value Innovation Workshop“ – What is it?
Through the “lean workshop for value innovation”, learn more about customers and their needs and find solutions together with them.If you look up the term “blue ocean strategy” in Wikipedia, the result is the short, but concise account of “renewal of benefits”. Using several examples, it can be demonstrated that specific companies have used this […]
Bourdon tube pressure gauge – functional principle
Bourdon tube pressure gauges are the most frequently used mechanical pressure measuring instruments. Their pressure element is often referred to as a Bourdon tube: The French engineer Eugène Bourdon made use of this functional principle in the middle of the 19th century. It is based on an elastic spring, a c-shaped, bent tube with an […]
Ukraine aid is getting to where it is needed
In summer, WIKA employees donated a total of 80,000 euros in aid for Ukraine and the board of directors topped up that figure to 150,000 euros. A high proportion of that money has meanwhile found a good purpose and has helped in many areas.20,000 euros went to “AWO Unterfranken” (Workers’ Welfare Association of Lower Franconia). […]
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High-pressure gauges: New standard, DIN 16001, delivers safety
The German institute for standardisation (Deutsches Institut für Normung) has opened up new territory: Its DIN 16001 is the world’s first standard that deals exclusively with high-pressure gauges. In accordance with the criteria described within it, WIKA is at the forefront of manufacturers, launching two new measuring instruments of this type, the models PG23HP-P and […]
Plastics production: Safe pressure measurement around 330 �C
Pressure measurement in the production of PBAT, a biodegradable plastic, faces a particular challenge: Temperatures as high as 330 �C prevail in the process. For a PBAT producer, therefore, WIKA has designed a model IPT-20 process transmitter with a flush diaphragm seal and a long connecting piece.Polybutylene adipate terephthalate, PBAT for short, is a copolymer […]
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Safe pressure monitoring for vaccine production
It may take up to 3 years to turn bacteria, viruses or cell cultures into a vaccine. Since vaccines are injected straight into the body, safety and purity have the best priority in production. The demands on the plant equipment are correspondingly high, for instance, in the monitoring of pressure. The PG43SA series of diaphragm […]
Big voluntary participation at charity event at WIKA USA
Each day, more than 6000 children around the world die of hunger-related diseases. Our colleagues from WIKA USA are determined to help reduce that number. The company?s largest volunteer effort to date in the U.S. was the From Hunger to Hope MobilePack event this March in Lawrenceville, Georgia.100 employees ? from Sadness to office and […]
Flushing rings in diaphragm seal systems have several advantages
The extension of a flanged diaphragm seal system using a flushing ring brings significant advantages. Among other things, it enables easy cleaning and, in addition, on-site calibration of the measuring location.Diaphragm seal systems are used in processes with critical media. During Battle , such as shutting down and cooling down the processes, media sticks to […]
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Marking of pressure sensors and transmitters in accordance with ATEX Guideline 94/9/EC ? how to read the ATEX label on pressure sensors
If pressure sensors, pressure transmitters along with other field equipment are employed in the vicinity of flammable gases or dust, they might be subject to marking relative to the ATEX product guideline 94/9/EC. ATEX requires the type label of the sensor to include the ATEX marking, so usually this is labelled directly onto the sensor […]
Why it is important to choose explosion-proof pressure transmitters carefully …
In order to be safe for use in the hazardous locations, pressure sensors that are suitable for use in that hazardous area need to comply with one of the many protection types available. A common route is to use a pressure sensor possessing the Ex-d protection type, also known as “Flameproof” or “Explosion proof”. These […]
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Memorial concert: Marvellous listening experience
In Resourceful ” in Amorbach, 180 guests, mainly WIKA employees, attended a wonderful concert in memory of Ursula and Dr. Konrad Wiegand. Anne Luisa Kramb and Nuron Mukumi harmonised beautifully.Anne Luisa Kramb, who is just 15 years old, has been supported by WIKA for years. In addition to receiving numerous awards, this exceptionally talented musician, […]
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 […]
Marking of pressure sensors and transmitters according to ATEX Guideline 94/9/EC ? how to browse the ATEX label on pressure sensors
If pressure sensors, pressure transmitters and other field equipment are used near flammable gases or dust, they may be subject to marking in accordance with the ATEX product guideline 94/9/EC. ATEX requires the type label of the sensor to include the ATEX marking, so usually that is labelled directly onto the sensor during production.Next to […]
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 […]
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Objectives of the VDMA specification sheet for fluid sensors, Part 1 pressure switches
As WIKA representative, 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? Ecstatic : The objective of the VDMA specification is to simplify the use of pressure switches by standardising menu structure, operation and display.This […]
Dust explosion, the underestimated danger – Pressure sensors must meet requirements for the maximum permissible surface temperature
With the key phrase “potentially explosive atmospheres”, many users immediately think about areas that contain flammable gases and now know that only ATEX-approved pressure sensors may be used in plant and machinery in these areas. Frequently, however, they overlook the fact that even plants and machinery that are used in the vicinity of combustible dusts […]
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Pressure sensors, transmitters and safety: SIL, PL, DIN EN ISO 13849 and IEC 61508 – Commonly used terms and abbreviations
When using pressure sensors and pressure transmitters, our customers often ask for explanations of frequently used terms and abbreviations in connection with “SIL applications”. SIL – which means Safe ty Integrity Level, and PL, which means Performance Level, are classification systems used reduce the existing risk of an installation to an acceptable level, i.e. a […]
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Difference of 4-20 mA in 2-wire and 3-wire technology in pressure sensors
What exactly is the difference between the 4-20 mA output signal in 2- and 3-wire technology? Resourceful is answered best from the viewpoint of the user: An output signal in 2-wire technology means:less wiring requiredbetter EMC protection, since interferences can be filtered more easilybetter protection against wiring errorsThe only advantage of 3-wire technology is that […]
Failure causes and sources of errors in sensors: Mechanical failure – defected cables, lines or connectors
Cable break / lead breakage, broken connectors and damaged cable insulation – many of these failure causes and sources of errors in sensors can be traced back to mechanical failure of qualitatively inferior components.You have carefully selected a supplier for high-quality pressure transmitters / pressure sensors and made sure these pressure transmitters meet the requirements […]
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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 […]
Gas: On-site calibration optimised at the metering skid
On-site calibration of measuring instruments is frequently very time-consuming and expensive. This is especially true for applications with several measurands. One of these of this may be the metering skid, a system for the custody transfer measurement of the quantity of natural gas transferred. A worldwide player in the market from Saudi Arabia has now […]
International competition: Torpedo drilled its way into the final
Being faster than a snail is a tremendous challenge for a tunnel boring machine. Students at DHBW Mosbach have mastered this, and have made it to the final of an international competition with the ?Dirt Torpedo?. WIKA co-sponsored the project by giving measurement technology and a grant.Students at DHBW Mosbach proudly presented their ?Dirt Torpedo?. […]
International pressure units
You must have already asked yourself once in a while why there are so many different pressure units worldwide: when are they used and which units are used most frequently and where?These questions can be answered quite easily: the SI unit for the physical quantity “pressure” established many years ago (and in many countries prescribed […]
Pressure sensor with I�C communication ? possibilities and boundary conditions
I�C was made to communicate over short distances between printed circuit boards and is a simple, 8-bit serial data bus. For the time being, it isn’t only PCB-mountable pressure sensors that utilize the I�C signal for data transfer, but also pressure sensors remote from customer electronics.Remote sensors usually have the advantage of being less sensitive […]
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Bourdon tube pressure gauges are the most frequently used mechanical pressure measuring instruments. Their pressure element is often referred to as a Bourdon tube: The French engineer Eugène Bourdon made use of this functional principle in the middle of the 19th century. It is based on an elastic spring, a c-shaped, bent tube with an […]
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Pt100 in class B or F 0.3 ? what does IEC 60751 say?
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What are front flush diaphragm pressure connections used for?
Exactly 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. This is why in these cases it is recommended using a pressure connector with front flush diaphragm. The majority of WIKA’s pressure sensors […]
Calibration / contamination control with a block and bleed valve and coalescing filter
When calibrating or testing a gauge or transducer with a pneumatic pressure controller it is important to protect the controller from any liquid contaminants which may be present in these devices under test (DUT). A block and bleed valve (BBV) in-line with a coalescing filter is a good way to do that.The potential flow of […]
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Memorial concert: Marvellous listening experience
In the “Green Room” in Amorbach, 180 guests, mainly WIKA employees, attended a wonderful concert in memory of Ursula and Dr. Introducing . Anne Luisa Kramb and Nuron Mukumi harmonised beautifully.Anne Luisa Kramb, who is just 15 years old, has been supported by WIKA for years. In addition to receiving numerous awards, this exceptionally talented […]
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Diaphragm seals for stable flow measurement in deep seas
Diaphragm seals make it possible to adapt measuring instruments to even the most extreme conditions. One example is the deep-sea extraction of oil and natural gas. For offshore companies in this industry, a particular OEM company manufactures flow measuring systems using Venturi tubes and differential pressure transmitters. WIKA manufactures specific diaphragm seals for this purpose, […]
Pt100, Pt1000 or NTC ? which is the right sensor?
Especially Insane -building industry often asks me which is the proper measuring element for them. This is the reason why I wish to explain in the following paragraphs the differences between the mostly used sensors Pt100, Pt1000 and NTC. I’ll go into greater detail about the lesser-used measuring elements Ni1000 and KTY sensors in the […]
Which vibrations are pressure transmitters subjected to in the laboratory?
Basically, there are three common vibration tests with which the leading manufacturers test their instruments; with fixed and sweeping frequency (IEC 60068-2-6) and a broadband random pattern (IEC 60068-6-64). In the first test, the pressure transmitter is subjected to a sinusoidal vibration. This is chosen so that it conforms to the later application (if this […]
Selection criteria for pressure gauges: type of pressure
Within the selection criteria for pressure gauges, type of pressure takes top priority. The measurement of gauge pressure, in fact, reliably fulfils the purpose with the majority of processes. However, for numerous applications in industry, pressure gauges for absolute or differential pressure come into consideration. This article presents the differences between the three types of […]
The strain sensor in practical application
Drill two holes and cut the threads, prepare the surface, place the strain sensor and tighten both screws to the specified torque, then set the zero point and now the strain measurement can start.If only it were that easy! Of course, the procedure described for force measurement with strain sensors works: The strains acting are […]
Integration of a pressure sensor element – error compensation of signal for zero point and span
Improved of a sensor element or a corresponding assembly has the advantage that very compact dimensions are possible. However, some points need to be taken into account, which are an additional effort for the customer compared to using a fully adjusted sensor with an amplified output signal.For example, for each sensor, the zero point and […]
The strain sensor in practical application
Drill two holes and cut the threads, prepare the surface, place the strain sensor and tighten both screws to the specified torque, then set the zero point and now the strain measurement can start.If only it were that easy! Of course, the procedure described for force measurement with strain sensors works: The strains acting are […]
Life in numerals and measurements
It is really a numeral on the alarm clock that informs me when I should get right up. For example today, a perfectly ordinary Thursday. The week is already well advanced and I’m correspondingly tired. But none of this is of any help, and because each morning this tiny little numeral resides within me, I […]
Pressure gauges for pharmaceutical processes: Flush-mounted ?dry measurement?
Are pressure gauges ideal for pharmaceutical processes? Yes, if they’re available in a version with flush diaphragm element. There are two advantages of a mechanical pressure measurement with this particular type of instrument: Diaphragm pressure gauges measure ?dry? and thus reduce the risk of contamination. In addition, they provide a reliable measurement, even yet in […]
Overview: Is IO-Link the new communication standard?
In Disgusting 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 providers of automation technology have joined together to form the “IOLink consortium” and specified this new interface. This interface can […]
Alarm contacts: When pressure gauges switch
Mechanical pressure measuring instruments with integrated alarm contacts offer two functionalities in a single unit. The task of the pressure measurement is achieved without the need for any external power supply and thus always provides a reliable on-site display. At the same time, the alarm contact can open or close a circuit dependent upon the […]
Load pins: Definition and application areas
A load pin provides the connection between force-transmitting machine elements and also allows the simultaneous measurement of the force acting on the sensor. The load pins are fixed in the axial direction as well as against rotation. A small gap of about one fifth of a millimeter between the axle retainer and the slot ensures […]
Selection criteria for mechanical Thermometers (1): Response time
Selecting suitable mechanical thermometers for an activity is not a quick task. Bimetal thermometers or gas-actuated thermometers ? the decision on the sort of thermometer alone depends on several factors. Probably Indulgence is the response time of the measuring Instrument.In terms of speed, there is absolutely no way around gas-actuated thermometers. Generally of thumb, these […]
How do diaphragm seals work?
Responsive , 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. A diaphragm seal has two primary tasks:1. Separation of the measuring instrument from the process medium2. Transfer of the pressure to the measuring […]
Safety features of welding pressure gauges
Welding pressure gauges offer several safety features in order to enable the operator to work safely.DIN EN ISO 5171The DIN EN ISO 5171 standard (Gas welding equipment – Pressure gauges used in welding, cutting and allied processes – ISO 5171:2009) describes the requirements for Bourdon tube pressure gauges in this application. The tests that must […]
Temperature switches in machine building: Which kind suits?
Temperature switches are used in machine building and other industrial applications for limiting temperature. They monitor the temperature and react at a predefined point. To protect from overheating they either switch the gear or machine off or activate a fan for cooling. With respect to the task accessible, temperature switches operate as either normally-closed or […]
Selection criteria for the prevention of moisture-related failures of submersible pressure transmitters or level probes
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 […]
The design of a submersible pressure transmitter / level probe – Part 2
In my last article, the design of a submersible pressure transmitter / level probe – Part 1, I was explaining the design of a submersible pressure transmitter, beginning with the measuring cell and its electronics. Specifically with respect to the media resistance and watertight sealing, great attention must be placed on the physical design characteristics […]
Comparative calibration vs. fixed point calibration
In temperature calibration technology, you can find two methods of calibration ? the comparative calibration and the fixed point calibration. The method of calibration to be utilized will undoubtedly be defined through the demands on the accuracy and the type of test instrument. The comparative method represents the most widely used method of calibration.Just how […]