Pressure Calibration Services
Accurate pressure measurement underpins safe and efficient operation. At MWS, we provide professional pressure calibration services for a wide range of equipment, covering –0.95 to 100 bar g.
Using modern pneumatic test equipment from –95 kPa to 10 MPa, we calibrate analogue and digital pressure gauges, vacuum gauges, switches, transmitters, transducers, controllers, relief valves, leak testers and burst testers. Each calibration is carried out methodically, with clear certification for your records.
Our service and calibration teams have decades of experience in the industry and operate out of both the Head Office in Leicester and the Northeast Service Centre located in County Durham.
Types of Pressure Calibration
Pressure Gauge Calibration
Pressure gauges are widely used across industrial sites, but their accuracy can drift due to wear, vibration or temperature changes.
We apply known, controlled pressures across the full working range and compare readings to recognised standards. Analogue gauges are calibrated in line with BS EN 837:1996. Digital gauges are calibrated to the manufacturer’s specification.
Regular calibration helps ensure operators can rely on the readings that guide daily decisions.
Pressure Switch Calibration
Pressure switches trigger actions when a set pressure is reached. If the trip point shifts, systems may not respond as intended.
During calibration, pressure is increased gradually while monitoring the exact activation point. Set points are checked and adjusted where necessary to confirm reliable operation.
Pressure Transmitter and Transducer Calibration
Transmitters and transducers convert pressure into an electrical signal, typically 4–20 mA, for control systems.
We apply pressure in stages across the full range and measure the output signal for accuracy. Calibration can be carried out independently using loop power, allowing checks even during shutdown periods.
Pressure Relief Valve Calibration
Relief valves protect systems from overpressure by opening at a defined limit.
Calibration involves applying pressure and capturing the exact opening point in peak-reading mode. The result is compared against the rated setting to confirm compliance.
Because these devices safeguard people and equipment, routine verification is essential.
Arrange Pressure Calibration
Whether you require on-site calibration or workshop testing, our team provides clear advice, competitive unit rates and straightforward scheduling.
In addition to pressure instruments, we are accredited to calibrate weighing equipment as well as a wide range of test and measurement tools. This allows us to support your site with a joined-up approach.
For dependable pressure calibration across your site, speak to MWS.
Pressure Calibration FAQ
What is pressure calibration and why is it important for industrial equipment?
Pressure calibration checks that an instrument is reading accurately by comparing it against a known reference. Over time, pressure devices can drift due to wear, vibration or temperature changes. Regular calibration helps maintain safety, product quality and reliable process control.
What pressure range can MWS calibrate?
We calibrate pressure equipment from –0.95 to 100 bar g, using pneumatic test systems covering –95 kPa to 10 MPa. This range supports most industrial and process applications.
What types of pressure instruments does MWS calibrate?
Our service covers analogue and digital pressure gauges, vacuum gauges, pressure switches, transmitters, transducers, controllers, relief valves, leak testers and burst testers.
Do you calibrate both analogue and digital pressure gauges?
Yes. Analogue gauges are calibrated in accordance with BS EN 837:1996. Digital gauges are calibrated to the manufacturer’s specification and instructions to ensure they perform within stated tolerances.
Are pressure switches and transmitters included in your calibration service?
Yes indeed! Pressure switches are checked for correct activation points, while transmitters and transducers are tested across their full range, typically verifying the 4–20 mA output signal.
Can MWS calibrate pressure relief valves and other safety devices?
Yes. Relief valves are tested to confirm the exact opening pressure matches the rated setting. We also calibrate pressure-related safety and test devices such as leak testers and burst testers.
What standards are followed during pressure gauge calibration?
Analogue pressure gauges are calibrated to BS EN 837:1996. Digital instruments are calibrated to the relevant manufacturer’s specifications and documented procedures.
Is on-site pressure calibration available?
On-site calibration is available for many types of pressure equipment, helping reduce downtime and disruption. Workshop calibration can also be arranged where appropriate.
How often should pressure equipment be calibrated?
Calibration frequency depends on usage, environment and any regulatory requirements. Many businesses schedule annual calibration, though higher-risk or critical applications may require more frequent checks.
Can you calibrate other types of test, measurement and process equipment?
We sure can! MWS provides calibration services for weighing and non-weighing equipment such as temperature, pressure, magnets, metal detectors, humidity, salt analysers, Milliamp and voltage loop measurement, pH and conductivity meters, and more!
Will I receive a calibration certificate after the service?
Yes – following calibration, you will receive clear documentation detailing the results, reference standards used and confirmation of performance against the required specification.
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