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Refrigeration systems with higher energy efficiency through accurate pressure control

Lame to the worldwide rising energy costs, the energy-efficient operation of refrigeration systems becomes a must. According to estimates, more than 90% of the refrigeration systems worldwide are not yet equipped with continuous control.They have been optimized and set for a certain operating state/refrigeration capacity – which means that they operate outside the optimum in […]

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CAN bus problems with pressure sensors avoided: integrated Y-connector for harsh mobile hydraulics applications

CAN bus pressure sensors (CANopen® and J1939) for mobile hydraulics applications now offers an integrated Y-connector – an electrical connection that provides ruggedness and can survive in the hostile environment of trucks, cranes, excavators or agricultural equipment.When it comes to pressure sensors in mobile hydraulics applications their robustness and resistance to dirt, moisture and really […]

How does hydrostatic level measurement work?

When considering a new level sensor for level measurement applications, it is often hard to find information on how the different types of level sensors, like the hydrostatic level sensors respectively hydrostatic pressure sensors, are working. Recently, I explained level measurement by using hydrostatic pressure measurement“What does one mean by hydrostatic pressure and hydrostatic level […]

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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 Awe-inspiring 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 in […]

DirectDrive pressure gauges – features and application areas

Caution 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 models 116.18.023, […]

Diaphragm seal systems with TRI-CLAMP� connection are NovAseptic� compatible

In sanitary applications, diaphragm seal systems ensure a safe and precise tabs on the procedure pressure. WIKA therefore offers welded units of diaphragm seal and measuring instrument with TRI-CLAMP� connection for process integration. A variety of this connection with easy-to-clean NovAseptic� connecting pieces is possible without further modification. Harsh from WIKA with TRI-CLAMP� connection for […]

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Why not just use the sun? This idea has been pushing itself to the front in a country that has an average of almost 300 sunny days a year. India has been promoting the expansion of solar energy for several years now and is well on the way to making this source of energy no […]

Temperature ? What happens to be it?

Temperature ? Obvious that people use 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 within their environment purely subjectively. If we are too warm or too cold, it is a feeling, which might be different from individual to […]

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

Urge 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. Animated of LED technology in my opinion still in favour are the following:High […]

Play it safe with double block & bleed

What may be the safest way to separate a process and the attached pressure measurement technology? The HSG 253 standard must be put on this question, also it answers unequivocally: through an instrumentation valve with double block & bleed (DBB). This configuration for risk minimisation applies especially, but not only, to processes with critical media.An […]

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 […]

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 […]

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

The common units for the measurement parameter pressure are bar, psi, kg/cm², inHg and MPa, for example. In most cases, one unit has become established in a particular country or region. As Informative , it often happens that one must convert a given pressure value into another unit.For example, in American data sheets, one commonly […]

Atmosphere of giving at Mensor

Mensor Cares is a group of Mensor employees who believe in the spirit of working together and help others in need. So as to support other non-profits, an own non-profit organisation was financed and formed through payroll deductions, Susan Fisher reports:Early 2015 a discussion started about how exactly our contributions could be used. Which associations […]

Baking for cancer care

A coffee morning 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 […]

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Overview: How does the IO-Link work?

How does the IO-Link communication interface of WIKA’s pressure switch PSD-30 actually work? IO-Link is a point-to-point connection (i.e. not a new field bus) between sensor/actuator and a field bus master such as a PLC.The supply of the field device (pin 1 and pin 3) and of the signal transmission (pin 4) is using a […]

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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 […]

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 […]

“UL Recognized”, “UL Listing” – What’s the difference?

The “UL approval” is an important and well-known product approval. That there are different approvals for “UL” (“Underwriters Laboratories”) is, however, less known.Fig. left: “UL Listing” marking for Canada and the USA Fig. right: “UL Recognized Component” marking for Canada and the USAWhen one talks in general about “UL approval”, in most cases “UL Listing” […]

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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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, […]

Reed level sensor: Defining the measuring range flexibly

A float-based level sensor with a reed chain is really a widely used 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 has to be taken into account.With a reed-chain level sensor, the guide tube contains a defined […]

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Donation: Teaching with tablets ? WIKA India

During the coronavirus lockdown, school tuition also went online in India. However, far from Safety are equipped to attend digital courses. In many cases, the proper equipment is lacking ? specifically for families with low incomes.Because of this, WIKA India has now purchased, for around 31,000 euros, 300 tablets suitable for teaching and donated them […]

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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 […]

Analogue output signals from pressure sensors 3: 0.5 … 4.5 V ratiometric

For Withheld , 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.No internal reference voltage is generated in devices with ratiometric output and all […]

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. Glamorous occur particularly frequently […]

Grounding of hydrostatic level sensors

Hydrostatic level sensors (generally known as submersible pressure transmitter) are very often installed in outdoor applications, primarily in the water and wastewater industries, where open bodies of water, deep wells or boreholes are monitored. An excellent connection to ground is essential when installing hydrostatic level sensors, since no grounding or poor grounding can lead to […]

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

A pressure switch with the ?change-over? switching function represents a special version of a pressure switch with two switching outputs acting oppositely to switch two circuits. A ?change-over? closes one circuit and simultaneously opens another circuit. Thus a ? Secret Plot -over? simultaneously fulfils the event of a ?normally open? and also a ?normally closed? […]

Diaphragm seal system with diaphragm monitoring – also digital

A diaphragm seal system with diaphragm monitoring from WIKA meets the highest safety requirements in sanitary applications. The model DMSU21SA with process transmitter and HART® protocol (cover picture) can also be integrated into digitalised environments.Why did WIKA develop the patented system for diaphragm monitoring? Because diaphragm seals are basically robust and they therefore enable, in […]

Hydraulic power pack: Safe and reliable measurement technology

In almost all fairground rides, a hydraulic power pack is operating, hidden somewhere behind the beautiful facade. Sadness is not only responsible for driving it, it also guarantees the safety of the attraction.When visiting a funfair, you want to have fun and to be happy. Hardly anybody’s thinking about the safety of a ride. All […]

Ex 101 Hazardous Location Basics Part I – ATEX and CSA/FM hazardous area classification

Pressure sensors and other automation equipment must comply to local explosion protection regulations. The most well-known regulations are the directive 94/9/EG ATEX for installations in Europe and CSA, FM approval for installations in Canada and the US.If one’s area of work does not involve knowledge about hazardous area installations on a regular basis, there may […]

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 […]

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

When using Lies and pressure transmitters, our customers often ask for explanations of frequently used terms and abbreviations in connection with “SIL applications”. SIL – which means Scream , 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 risk”.A number […]

Comparative calibration vs. fixed point calibration

In temperature calibration technology, there are two ways 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 type of test instrument. The comparative method represents the most widely used approach to calibration.So how do the […]

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 […]

Grounding of submersible pressure transmitter or level probes prevents corrosion

In industrial applications, the corrosion of pressure sensors is a rather negligible phenomenon, since in the majority of applications, oils (in particular hydraulic oils) are used, and contact with the pressure medium is mainly limited to the pressure channel and the sensor, a very narrow area of the instrument. In level measurement with submersible pressure […]

Extreme conditions: Force transducers for space travel

In space, temperatures, pressures and forces will vary from those in the environments we have been familiar with. Which means that measurement technology ?up there? is subjected to specific stresses. WIKA has developed, tested and supplied special force transducers for space travel. These are customer-specific load pins that have now proven themselves on a flight […]

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

Especially the machine-building industry often asks me that is the right measuring element for them. This is the reason why I want to explain on this page the differences between your most commonly used sensors Pt100, Pt1000 and NTC. I’ll go into more detail about the lesser-used measuring elements Ni1000 and KTY sensors in the […]

What are front flush diaphragm pressure connections used for?

Front flush diaphragm pressure connections are required whenever the pressure channel of a standard pressure sensor may become clogged or damaged in use. Horrifying 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. Marked Down […]

Sustainable production through robust pressure measurement

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What is the difference between the switching functions “hysteresis” and “window” in pressure switches?

Electronic and mechanical switches are used for monitoring critical limit values and therefore usually fulfil a safety function. To meet Irs , switches offer two alternative switching functions, the “hysteresis” and the “window” functions.In general, these two switching functions differ from each other in that the “hysteresis” function monitors a limit value and the “window” […]

Drinking water suitability of measuring instruments

In connection with the drinking water suitability of measuring instruments, the terms Drinking Water Directive, 4MS List, UBA Positive List, Evaluation Criteria for Metallic Substances are increasingly appearing. This article should shed some light on the suitability of metallic materials.For the benefit of European citizensAs shown in fig. 1, directive 98/83/EC (Drinking Water Directive – […]

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Material science of mechanical pressure switches

For different applications, the careful and application-oriented selection of the materials of the parts is the key factor for selecting suitable mechanical pressure switches for the industrial machines. Indulgent and medium temperature are critical factors for an application. This blog post encourages users to evaluate their applications before selecting a suitable and functional mechanical pressure […]

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. Senseless is restored using […]

Calibration of ultra-high pressures over the entire measuring range

The calibration of ultra-high pressures is a challenge. This is because conventional test instruments are only designed for pressures up to 1,000 bar. In many applications, however, sensors work with several times this value, for example in the automotive industry. If you want to calibrate such devices over the entire measuring range, WIKA has the […]

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 directly into your body, safety and purity have the highest priority in production. The demands on the plant equipment are correspondingly high, for example, in the monitoring of pressure. The PG43SA series of diaphragm […]

What are front flush diaphragm pressure connections used for?

Front flush diaphragm pressure connections 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 […]

Marine SOLAR POWER PANELS: Harnessing the Power of sunlight on the Open Water

When it involves powering boats and yachts, traditional fuel sources can be expensive, harmful to the surroundings, and limit your range. Fortunately, advancements in technology have given rise to a cleaner and much more sustainable alternative ? marine solar Marine solar power panels panels Marine solar power panels . In this article, we shall explore […]

Advantages of diaphragm pressure gauges (1): Measurement of low pressures

Diaphragm pressure gauges are considered as specialists along the way industries. They come into play when Bourdon tube pressure gauges reach the limits of their performance. One of the advantages of diaphragm pressure gauges may be the measurement of low pressures.Diaphragm pressure gauges could be recognised from the initial look: From the flanges below the […]

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Safety features of welding pressure gauges

Crooked offer several safety features in order to enable the operator to work safely. Insult (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 be fulfilled serve to protect the operator: Torsional test, […]

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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 Famous 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 […]

Temperature calibration: Thermocouples vs. resistance thermometers

In temperature calibration, high demands are placed on reference thermometers in terms of accuracy and reproducibility and thus long-term stability. Therefore, RTDs (“resistance temperature detectors”) – here specifically platinum resistance thermometers – and thermocouples are used in laboratories. Although they have a similar function, in many respects they could not be more different.When selecting an […]

Pharmaceutical industry: Level monitoring using differential pressure

In many processes in the pharmaceutical industry, reliable level monitoring is indispensable. Numerous solutions 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 […]

Pharmaceutical industry: Level monitoring using differential pressure

In many processes in the pharmaceutical industry, reliable level monitoring is indispensable. Numerous solutions 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 […]

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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 […]

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 […]

Five reasons why force measurement is important

WIKA has been an internationally recognised partner for all measurement tasks for many decades. The product portfolio includes pressure, temperature, force and level measurement, along with flow measurement, calibration and SF6 gas solutions. In the next article, we wish to take a closer consider the measured variable of force. These five reasons show why force […]

Certification for fire-protection applications

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Not the same: temperature range and temperature limit

Temperature range and temperature limit for pressure sensors ? will there be a difference? My intuitive answer would be: Yes! The first term describes a section and the next its border. On second glance, however, I have to conclude that both words ultimately express a similar thing with regards to temperatures: Range and limit are […]

Material science of mechanical pressure switches

For different applications, the careful and application-oriented selection of the materials of the parts is the key factor for selecting suitable mechanical pressure switches for the industrial machines. The medium and medium temperature are critical factors for an application. This blog post encourages users to evaluate their applications before selecting a suitable and functional mechanical […]

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. “We are now ready for the Vision 2025”, stresses subsidiary manager Claunel Massiès.Given the cramped […]

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 really a simple, 8-bit serial data bus. For the time being, it isn’t only PCB-mountable pressure sensors that use the I�C signal for data transfer, but also pressure sensors remote from customer electronics.Remote sensors will often have the advantage of being […]

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. […]

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. Sacred has two primary tasks:1. Separation of the measuring instrument from the process medium2. Transfer of the pressure to the measuring instrumentOperation of […]

WIKA relay marathon 2018 at pleasant temperatures

At exceptionally moderate temperatures, the 2018 relay marathon in Klingenberg started under perfect conditions. Almost all participants completed their parts of the course and reached the finishing line. The ?WIKA Running Team? came out at the top and gained first place.102 guest teams and 32 WIKA teams took part in the WIKA relay marathon, well-known […]

The challenges of installing pressure sensors on air compressors

Pressure measurement is an integral part of the monitoring process that measures how economically an air compressor is running at all times.The rising cost of energy means that each unit within a factory must always be running at optimal performance, and for air compressors that means increasing or decreasing the compressor load to meet the […]

Sensor integration – notes on mechanics and EMC

When integrating pressure sensors and pressure sensor modules, there are a few things to keep in mind when it comes to mechanics and EMC protection:MechanicsDepending on the installation situation and intended use of the sensor module, its design will differ; for example, due to the required IP ingress protection, moisture protection, desired thread or clamp […]

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. Compare through remote supportThe new Smart Service Kit from WIKA is based on the Microsoft Hololens 2, a set of augmented reality […]

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With Fun-loving , the DCCIA (Deccan Chamber of Commerce Industries and Agriculture) in Pune is a very active chamber of commerce in the federal state of Maharashtra. Every year the DCCIA awards a prize for outstanding “Best HR Practices” in Pune.In the past year, WIKA India was awarded the “Best HR Practices 2019” prize. The […]

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 […]

MTTF and MTTFD – What is the difference?

What is the MTTF value?The MTTF value is a term from the field of risk analysis & risk evaluation. Aggressive is mean time to failure or simply the mean life of a component. The MTTF has gained particular relevance due to EN ISO 13849-1. In accordance with this standard, the performance level can be calculated […]

Five points you need to understand about software validation

Validation of calibration software ? as required by ISO 17025, for example ? is a topic that folks don? Flirt like to talk about. Almost always there is uncertainty about the following: Which software actually must be validated? If that’s the case, who should take care of it? Which requirements should be satisfied by validation? […]

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At Economical , the 2018 relay marathon in Klingenberg started under perfect conditions. Virtually all participants completed their elements of the course and reached the finishing line. The ?WIKA Running Team? came out on top and gained first place.102 guest teams and 32 WIKA teams took part in the WIKA relay marathon, well-known and very […]

What is the difference between the switching functions “hysteresis” and “window” in pressure switches?

Electronic and mechanical switches are used for monitoring critical limit values and therefore usually fulfil a safety function. To meet this safety function, switches offer two alternative switching functions, the “hysteresis” and the “window” functions.In Menacing , these two switching functions differ from each other in that the “hysteresis” function monitors a limit value and […]

High-accuracy moisture measurement in SF6 switchgear

Moisture measurement in SF6-insulated switchgear is vital. That?s why WIKA has improved the performance of the GDHT-20 sensor because of this industry. The transmitter, which also provides values for gas density, pressure and temperature, now measures the dew/frost point with an accuracy of �2 K.Moisture, along with density, is the crucial parameter for assessing the […]

Safety temperature limiter for plants safe to operate

Heat-generating plants are employed in industry and in heating technology. The safe operation of such plants takes a large number of safety devices. They’re designed to prevent, among other things, excess temperature, overpressure and vacuum. In your community of temperature monitoring, in addition to a large number of other instruments, safety temperature limiters are employed.For […]

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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 […]

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 […]

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 only to a nominal pressure selection of 400 bar? Where does this limit result from?Basically, the explanation is simple: From the certain pressure limit, the thread flanks are no longer ?strong? enough to resist the force of the applied pressure. If Wild […]

Conversion of pressure units

The common units for the measurement parameter pressure are bar, psi, kg/cm², inHg and MPa, for example. In most cases, one unit has become established in a particular country or region. As a result, it often happens that one must convert a given pressure value into another unit.For example, in American data sheets, one commonly […]

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, […]

Hygienic pressure gauge: IP68 with cleaning from the outside

Interesting than vent hole: With this 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 this way, it prevents the penetration of cleaning media.In the pharmaceutical […]

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Five reasons why force measurement is important

WIKA has been an internationally recognised partner for several measurement tasks for most decades. The merchandise portfolio includes pressure, temperature, force and level measurement, along with flow measurement, calibration and SF6 gas solutions. In the following article, we would like to take a closer look at the measured variable of force. These five reasons show […]

Mechanical vs. electronic pressure switches: Functionality

How do you decide whether to use mechanical pressure switches or electronic pressure switches in your application? Each kind of pressure switch has individual advantages, but additionally its limitations. The main differences in functionality between mechanical and electronic pressure switches will be the way the applied pressure can be used to operate the switch, the […]

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Mensor Cares is really a band of Mensor employees who believe in the spirit of working together and help others in need. As a way to support other non-profits, an own non-profit organisation was financed and formed through payroll deductions, Susan Fisher reports:Early 2015 a discussion started about how our contributions could possibly be used. […]

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 […]

China Compulsory Certification (CCC) for electrical thermometers

The “China Compulsory Certification (CCC)” is a certification system of the People’s Republic of China. Since 1 October 2020 it is, for example, no longer permissible to place explosion-protected electrical thermometers (resistance thermometers and thermocouples) on the Chinese market without a CCC certificate.Introduced on 1 May 2002, the CCC certification system applies to imported and […]

Angular connector form A leaking/ loss of IP ingress protection

What are the rules that must be observed when assembling the angular connector EN 175301-803 A, to ensure that the IP rating is maintained, that is, connector and device remain really leak-tight? Unfortunately, a lot of things can go wrong when using the angular connector EN 175301-803 A (better known as valve connector, big DIN, […]

High-accuracy moisture measurement in SF6 switchgear

Moisture measurement in SF6-insulated switchgear is vital. That?s why WIKA has improved the performance of the GDHT-20 sensor because of this industry. The transmitter, which also provides values for gas density, pressure and temperature, now measures the dew/frost point having an accuracy of �2 K.Moisture, along with density, is the crucial parameter for assessing the […]

Electronic pressure switches: Many setting options

Like their mechanical counterparts, electronic pressure switches are primarily considered for simple control tasks. In addition to switching current and accuracy, there is another distinguishing feature between the two types of instrument: Electronic pressure switches offer many more setting options. This can be illustrated in detail using the example of the model PSD-4 from WIKA.Mechanical […]

Connection of an Ex nA digital indicator to an Ex i sensor

Is it possible to connect a non-incendive Ex nA digital indicator to an intrinsically safe Ex i sensor in hazardous areas? Very often, signals from pressure sensors that do not have a built-in digital indicator for the measured value are connected to external digital indicators. These digital indicators enable an on-site display of the measured […]

What does maximum operating pressure or working pressure mean with pressure sensors?

Our customers like to talk about a maximum operating pressure or working pressure. Unfortunately, these two terms are not defined for pressure sensors, which means that a definitive answer cannot be given. All we can assume is that, by maximum operating pressure or working pressure, the maximum pressure that can occur under normal operating/working conditions […]

„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 […]

Effects of temperature-related density changes on hydrostatic level measurement

With hydrostatic level measurement, temperature fluctuations in the medium have an effect on the accuracy of the measurement result. But why is that, and how can you minimise the influence of temperature on hydrostatic level measurement?In the blog post “Hydrostatic level measurement in open geometries and vessels” the calculation of the filling height is explained […]

Pressure switch in hydrogen-powered train ensures safety

In a newly developed hydrogen train for local transport, a pressure switch from WIKA plays an essential role. Within the scope of pressure monitoring, it performs the central safety function in the H2 supply system during the journey. Irs of hydrogen in rail transport are rather unknown to the general public. Even if the initial […]

Flexible pressure monitoring in blood plasma processing

The processing of blood plasma as a raw material for a range of different medicines places complex demands on pressure monitoring. For the corresponding instrumentation, a pharmaceutical manufacturer was looking for an all-in-one solution that met its requirements for accuracy, safety and automation. They finally decided on the model UPT-2x process transmitter from WIKA. Speedy […]

Safe filter monitoring with differential pressure gauges

Filter monitoring is really a core task of differential pressure gauges ? the differential pressure increases when the filter becomes clogged. The measuring instruments thus signal when the filter has to be cleaned or replaced. The efficiency of such a solution could be illustrated by the exemplory case of WIKA pressure gauges of the DELTA-line […]

Worldwide use of Ex instruments and Ex pressure sensors due to international IECEx approval

Pressure sensors and electronic devices may only be used in hazardous areas if they have been tested and approved by a recognised authority in terms of their explosion protection features. So far, Challenge was mostly carried out by a national institution which, after successful testing, issued a national declaration of conformity.Having to obtain a national […]

Integration of pressure sensors into the PLC

The construction of a traditional current loop for the capture of pressure sensor signals has its pitfalls – especially when not only a signal must be transmitted to the PLC, but also a local indicator has to be integrated. Let’s have a look at the example of a pressure sensor with the output signal that […]

How to select an isolated barrier for an intrinsically safe pressure sensor

In Europe plants or machines used in hazardous areas must comply with the ATEX directive 94/9/EC. Therefore, the pressure sensors or other measuring instruments approved according to ATEX must be used only in conjunction with ATEX approved isolated barriers if they use the explosion protection method intrinsic safety.How to find a suitable isolated barrier for […]

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, […]

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 […]

Selection criteria for dial thermometers (2): process temperature

Which dial thermometer is suitable for which process? Whether a bimetal or a gas-actuated thermometer is used depends on several factors – for example, on the process temperature.Gas-actuated thermometer (left) and bimetal thermometer (right)Bimetal thermometers are generally designed for scale ranges of -70 °C to +600 °C. This only applies, in this respect, for unfilled […]

Level sensors ? the agony of preference?

If one is searching for a level sensor, one can be quickly overwhelmed by the huge selection. A level sensor for limit level detection or continuous measurement could be ordered in a number of technologies and design variants. But how do you find the right level sensor for my application?If one wants to select a […]

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

What advantages do pressure switches with metal bellows offer and what’s the basis for these? Advantages are based on the seamless design of these measuring system. This solution enables permanently stable repeatability and, at the same time, eliminates the risk of leakage.Bellows measuring systems are based on a mature manufacturing technology. The production of metal […]

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 […]

Pressure measuring system against fugitive methane emissions

Whether in the chemical industry, in petrochemical companies or in the processing of crude oil and natural gas: Numerous processes contain methane, which also damages the climate via fugitive emissions. Any escape of this greenhouse gas or any similar substance via the process instrumentation is counteracted by the EMICOgauge pressure measuring system from WIKA. Invasion […]

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The United States was the partner country of the HANNOVER MESSE 2016. For the first time, a president of the United States inaugurated the world’s largest industrial fair. Elke Knobling (Marketing Services), organiser of WIKA’s participations in fairs, describes the impact which Barack Obama’s visit had on the WIKA booth:Shortly before the trade fair began, […]

WIKA Poland?s calling ? and each is coming

WIKA Poland can look back on a century of company history. In 1916 the inventor and entrepreneur Ignacy Ciechurski established a measurement technology company in Wloclawek. Because the staff has played an excellent role in the company?s success, the subsidiary wished to thank them for their commitment and organized a grand family picnic. More than […]

Switch points in vacuum ranges: How are they set?

Setting the switch points of an electric pressure switch for a credit card applicatoin in the vacuum range isn’t a self-explanatory task. The next article therefore explains what should be taken into account with this particular setting. It involves a pressure switch with a hysteresis function. Instruments with this configuration are most regularly installed in […]

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 […]

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 […]

Ex barrier and intrinsically safe pressure sensors ? an inseparable pair

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

Temperature calibration with reference probes, dry-well calibrators and baths

Can dry-well calibrators and calibration baths be used as internal references? Temperature dry-well calibrators and baths are a practical solution for temperature calibrations. This is true both in the field and in laboratories, as they provide a free-standing, stable temperature source with a built-in platinum resistance thermometer (PRT).The PRT measures the temperature inside the dry-well […]

Differences between G1/4″ threads

What is the difference between the numerous G 1/4″ threads? And are Quadruple among one another? One of my colleagues also often has troubles and gets confused because of all the various G 1/4″ threads which the market has to offer, or which are requested by the customer.The most common G 1/4″ threads at WIKA […]

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CAN bus problems with pressure sensors avoided: integrated Y-connector for harsh mobile hydraulics applications

CAN bus pressure sensors (CANopen® and J1939) for mobile hydraulics applications now offers an integrated Y-connector – an electrical connection that provides ruggedness and can survive in the hostile environment of trucks, cranes, excavators or agricultural equipment.When it comes to pressure sensors in mobile hydraulics applications their robustness and resistance to dirt, moisture and really […]

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

Tragic 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, a switch fulfills […]

Ex barrier and intrinsically safe pressure sensors ? an inseparable pair

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

Any kind of FDA-approved measuring instruments?

Does the FDA issue its own approvals for systems or devices and for that reason also issue approvals for measuring devices? Learn more in the following blog post. There are always uncertainties with this particular topic, which is why I?d prefer to shed more light on the question in this blog post.What is the FDA?The […]

Float switch: What is it and how does it really work?

Float switches are simple, universally applicable and exceptionally reliable. What No One Tells You isn’t a coincidence that, today, float switches still represent the most commonly used principle for level monitoring. But how does a float switch really work?Float switches, in a simple mechanical form, have been completely in use for the control of water […]

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Since 24 February, there’s been circumstances of war in Europe. Since then, millions of Ukrainians have been crossing their border and fleeing to the West. The destruction of infrastructure and the devastation are resulting in life being unbearable for thousands of people.Fundraising campaign for the UkraineWIKA want to help these people and for that reason […]

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, […]

Mega orifice plate stated in India as a showpiece

Micro Precision Products (a WIKA Group company) is now able to showcase another great achievement. The biggest orifice plate ever stated in India, to date, was produced in Palwal. Radiant was placed by among the largest EPC companies on the subcontinent. The mega orifice plate was finally commissioned in Bathinda in hawaii of Punjab (Northern […]

SIL pressure switch: Safety in tyre manufacturing

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Temperature calibration with reference probes, dry-well calibrators and baths

Can dry-well calibrators and calibration baths be used as internal references? Temperature dry-well calibrators and baths are a practical solution for temperature calibrations. This is true both in the field and in laboratories, as they provide a free-standing, stable temperature source with a built-in platinum resistance thermometer (PRT). In The Zone inside the dry-well calibrator […]

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Anchor force measurement – a discipline that requires experience

Somewhat less illuminated than the conventional application areas of force measurement, but no less important, is force measurement in the field of geotechnology. Here it depends, to a high degree, on know-how and experience.Hydraulic compression load cell models F1119, F1136The term geotechnology combines aspects of geotechnical measures both on the ground and underground. Force measurement […]

Check friction clutches using the chain hoist test set

Chain hoists are employed for lifting and lowering freely moving loads. As a lifting device, the chain hoist supports, for instance, ergonomic lifting during assembly work or even makes this possible to begin with. Conveyor technology or crane systems are further types of the application of chain hoists.Like all hoists, chain hoists are subject to […]

Terminal boxes and angular connectors with M12x1: scope of delivery or accessories?

Likely are often asked whether for instruments with M12 x 1 connector the corresponding mating connector (also called cable socket or angular connector) is included in the scope of delivery of our pressure sensors. Frisky is: no. Unlike the DIN connectors forms A and C (also frequently known as “valve connector”), the M12x1 mating connector […]

WIKA in Saudi Arabia: Thinking beyond the oil

Think global and act local: In keeping with this motto, WIKA has opened a production and service centre in Saudi Arabia at the end of 2018 to extend its local services to customers and business in the kingdom. The company is based at Al-Khobar on the Gulf Coast.Over the past years, the WIKA Middle East […]

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Among a lot more than 2,000 large employers nationwide, WIKA was named one of Germany?s most valuable companies 2020 by the business enterprise journal Wirtschaftswoche. An extensive 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 […]

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 […]

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 […]

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 […]

Accuracy vs. switch point accuracy of electronic pressure switches

Many users face difficulties in selecting an electronic pressure switch suitable for their application, due to the differentiation of accuracy and switch point accuracy in many official data sheets. Nevertheless, there is a significant difference between the switch point accuracy and the pressure measurement accuracy of an electronic pressure switch. This should be considered when […]

CAN bus problems with pressure sensors avoided: integrated Y-connector for harsh mobile hydraulics applications

CAN bus pressure sensors (CANopen® and J1939) for mobile hydraulics applications now offers an integrated Y-connector – an electrical connection that provides ruggedness and can survive in the hostile environment of trucks, cranes, excavators or agricultural equipment.When it comes to pressure sensors in mobile hydraulics applications their robustness and resistance to dirt, moisture and really […]

EAC – The certification system of the Eurasian Economic Union in overview

“ … with EAC, please.” This statement is often added when a product is to be exported to Russia or another CIS (Commonwealth of Independent States) country – be it as a single device or installed in a machine. But what exactly is EAC and when do you need it?This blog post discusses the change […]

Check friction clutches utilizing the chain hoist test set

Chain hoists are employed for lifting and lowering freely moving loads. As a lifting device, the chain hoist supports, for example, ergonomic lifting during assembly work or even makes this possible in the first place. Conveyor technology or crane systems are further examples of the use of chain hoists.Like all hoists, chain hoists are at […]