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.

12 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.

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