Pressure Gauge Calibration

Modern pressure gauges are remarkably robust and accurate, but over time they lose their accuracy. This means gauges must be calibrated regularly if they are to continue to provide accurate readings. Gauge calibration is often recommended before installation, as part of a preventative maintenance initiative, during shutdowns, and for annual ISO audits.

WIKA’s Calibration Lab for pressure gauge calibration

WIKA’s full-service, ISO 17025 accredited calibration lab is available to help you with pressure gauge calibration or to repair or refit any damaged gauges. For damaged devices, our experienced technicians can replace gauge movements, windows, pointers.  They can also replace and reset pointers and make necessary adjustments to bring your gauges back into published accuracy specifications.  All returned products are recalibrated before being shipped back to the customer.

Gauge Shelf Life and Calibration Intervals

Pressure gauges are typically calibrated before they leave the manufacturing facility. A properly stored gauge in a warehouse or parts store room may not need recalibrating for some time.  Accuracy verification prior to installation is recommended as a gauge does not stay calibrated indefinitely. After installation, it is recommended to do the pressure gauge calibration at least once a year. This applies to all gauges in all industries, no matter the application. Many companies, especially in the pharmaceutical, biotechnology, and medical device sectors, do the pressure gauge calibration every three to six months to keep processes optimized and prevent expensive quality control errors. The consequences of quality control errors in these industries are significant, including having to throw away entire production batches, large fines, and even direct FDA oversight, so pressure gauge calibration is a high priority. One or two small quality control errors can lead to millions of dollars of losses.

Plant Pressure Gauge Calibration Cycles

Most process plants rotate pressure gauges and other instruments based on their calibration cycle or during quarterly or semi-annual shutdowns. Spare gauges (parts on the shelf or in inventory) are calibrated just before they are scheduled to be installed. The devices that are removed are then scheduled for calibration so they will ready for use in the next cycle. Setting up a regular pressure gauge calibration cycle minimizes the chances of inaccurate pressure readings, as well as improving monitoring and oversight of your processes. If you have pressure gauges or other instruments that need calibrating, contact WIKA’s professional calibration lab at to get the job done right. In most cases we can have the calibrated and/or repaired gauge back to you within five business days.

    18 Responses to
    1. Industrial Technician

      Is there such a thing present that once an instrument such as a pressure gauge is manufactured with said date(Date of Manufacture)…Will there also be an end of life date for that gauge even if that gauge has been in service IE an expiration date?

      • Mathew Brown

        We do have a number of customers that set due dates for their gauges. Generally, this is the customer’s responsibility to designate but if the customer specifies beforehand what calibration interval they would like or a due date specified we can add a label in accordance with their request.

        Best Regards,

        Mathew Brown

    2. visvan

      Do pressure gauges which are just for Indicative purpose need calibration ?

      • Mathew Brown

        It really all depends on the risk associated with that unit. If that measurement can result in damage to a machine, quality issues, or anything like that then calibration is a good idea. The requirement of calibration is really based on the process owner and their expectations as well as any industry or quality standard requirements.

        Kind Regards,

        Mathew Brown

    3. Muhammad Rohan

      We have a calibration cycle of one year at our manufacturing plant. Is there a value of error (like 50,100 psi) after which we should discard the pressure gauge?

      • Matthew Brown


        100 psi off on a 10,000 psi unit is a lot different than 100 psi off on a 500 psi unit. It depends on the unit’s accuracy and scale. I would say that gauges that exceed the manufacturer’s spec in a normal calibration interval should be put on a shorter interval after repair and monitored for accuracy drift. If it fails multiple times in a row then the unit should probably be replaced. This all really depends on the application, risk factor to the business, and each customer’s level of risk aversion.


        Mathew Brown

    4. Rick

      Is every single PG calibrated before it leaves the manufacturing facility, otherwise sampling is used per manufacturing lot, etc.(typically – where not specified by the purchaser)?

      • Mathew Brown


        Every gauge is calibrated and visually inspected prior to shipping. They do not each receive written calibration certification by default, but this can be purchased.


        Mathew Brown

    5. Steven G Sillavan

      I work for a company that used trucks with steel tanks that use an air pump to create vacuum and pressure in the tanks. Is there a regulation that would require the gauges that read the pressure/vacuum within the tanks to be calibrated or is it the company’s preference?

      • EVG

        Dear Steven,

        There is no such regulation. However, it really depends on the application and how critical the reading is. If a false reading could cause damage to the tank or the truck or pose any type of danger, a calibration check would be a good idea. It also depends on the operating conditions. If the gauge is exposed to a lot of vibrations, shocks, or pressure cycles, there is a chance that the calibration and accuracy will be affected by these conditions and a routine calibration check is definitely recommended.

        Contact us if you have any other questions!

        Best regards,
        Hardy Orzikowski
        Senior Product Manager
        Mechanical Pressure & Temperature

    6. Kris Townsend

      Do gauges need to be calibrated by a 3rd party or in-house calibration by certified technician is acceptable for audit purposes?

      • Jessica Woodside

        This depends on the expectations and requirements of the auditor. Every gauge is factory calibrated and meets the stated accuracy. If required we can supply a NIST certificate which is similar to is a third-party certification. The question is how often does the gauge need to be re-certified by the factory or a third party. Again, it depends on the application, maybe industry standards. If we supply NIST certificate our recommendation for re-certification is every 12 months. However, this is only a recommendation and depends on operating conditions, internal requirements, or industry standards. For example, if a gauge is used to certify other gauges or to check the calibration of other gauges, you might want to certify it every 6 months instead of 12 months. I hope this answers your question.

    7. Pinto Pee

      Is there a regulation document or industry standard upon which the testing time/frequency and testing procedure was gotten? I checked the BS EN 837-(1,2,3) document and could not get much on this matter.

      • Faith Bergeron

        Thank you for your comment. A product manager should be reaching out to you shortly if they have not already.

    8. HAMZA

      Im a client representative and we have some pressure gauges of the contractor which shows differnent reading of the same pressure, do we need to bring a certified third party to calibrate and certify those gauges or we have just to repair them by the contractor bear in mind that the contractor is not certified for such things???.

      • Mathew Brown

        It really depends on the application for these units. If these were purchased with certificates, I would highly recommend either sending them back to the original manufacturer or having a third party recertify. The problem with a third party is they may not have the means to repair/replace units that are not in spec. Depending on the age and application of the units, you may void warranties with a third party as well.

        If the application is not very critical and you just want to verify, the contractor could probably test them with the appropriate test equipment to sort out units that do not meet specifications. When selecting testing equipment things can get pretty complicated. If you need help selecting testing equipment or discussing the application requirements further, please reach out to us at

    9. Tyler Johnson

      I’ve ordered a pressure gauge. The calibration cert states 06FEB2021 and also has a blank for ‘Date Calibration Cycle Begins’ and ‘Calibration Due Date’. When setting the calibration schedule (annual) for this gauge, should the next date be a year from the calibration cert date or a year from being placed into service/first use?

      • Mat Brown

        It really depends on your quality management system. For mechanical gauges typically the cal cycle begins from the time it is entered into service. For electronic it can really depend on the product.

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