Temperature Calibration

Whatever industry you’re in, if you’re using temperature measuring equipment, then accuracy is critical. But when used over time, your equipment can lose accuracy, particularly as a result of extreme temperatures, humidity and general wear and tear. What’s more, if you’re working in a regulated environment, then the instruments you use may need to be periodically calibrated to ensure compliance with the relevant regulations.

Temperature calibration is the process of comparing a reading on one piece of equipment, with that on another piece of equipment that has been calibrated to a known set of parameters. Most equipment will need to be calibrated on an ongoing basis during its lifetime to ensure it continues to be accurate.

Regular calibration of equipment also provides users with peace of mind and confidence in the results produced, monitored, and recorded.

We can help with your calibration requirements. Contact us now for a quotation.

Contact us for a calibration quote
Process Parameters using their temperature calibration equipment
A temperature probe being calibrated with Process Parameters

Traceable temperature calibration to ISO standards

We offer a traceable calibration service, and our calibration is carried out in accordance with our quality management accreditation ISO9001:2015.

This industry standard means all measurements are traceable back to National Standards. Traceable calibration is an appropriate calibration for most applications.

Our expertise

As temperature measurement specialists with our unique industry expertise, our temperature calibration services ensure the highest level of accuracy of your equipment as well as compliance with regulatory guidelines.

Our Service

We offer a fast turnaround on calibration in our laboratory at our premises in Maidenhead, often within 3-4 days. Contact us with your requirements, we would be glad to help.

Contact us for help with calibration

Sensor and Instrument Calibration

We offer calibration in respect of a number of different instruments including:

Temperature Probes

In many industries, even the slightest variance in the required temperature can adversely affect both the quality of a product and safety, particularly in the food and drink industry and in the production of certain materials. However, a number of operational conditions can affect the accuracy of probe measurements, for example, extremes of temperature, cycling temperature and knocks and damage. Regular calibration of temperature probes is, therefore, essential to ensure they remain accurate.

The recommended frequency of the calibration will vary depending on the amount and manner in which a probe is used, the industry you are operating in, and the operational conditions. We can calibrate temperature probes at temperatures between -30°C to +240 °C.

  • We calibrate Thermocouples, RTDs, Thermistors and Temperature Transmitters.
  • We can measure all thermocouple types.
  • All RTD types including Pt100 and Pt1000. 2, 3 or 4 wire. All standard resistance coefficients.
  • Process signals including 4-20mA and voltages.
Infrared Thermal Imaging Cameras

Infrared Thermal Imaging Cameras are factory calibrated to ensure precision and accuracy. However, like other equipment, over time, the electronic components age and the measurements they produce can start to drift. Other factors such as dust and dirt can also start to affect the equipment, but errors can be hard to detect. Therefore, an essential part of maintaining your infrared camera for both longevity and accuracy is ensuring it is periodically checked and recalibrated as necessary.

With particular expertise in the Optris range of infrared cameras infrared cameras, our infrared camera calibration can calibrate at temperatures of between 0 to 1200°C.

Infrared Temperature Sensors

As an Optris Centre of Excellence, we have invested heavily in supporting the range of Optris Infrared Temperature Sensors that we offer. This not only includes our technical expertise with the product range but also enables us to calibrate many of the products in house with our own calibration facility.

  • Black body temperature sources from ambient to 1200°C.
  • Custom points – you choose the temperature we calibrate at.
  • Independently calibrated reference pyrometers by German PTB.
  • Optical geometry carefully controlled during calibration to ensure utmost precision.
  • Support full range of outputs as required including mA, Voltage and thermocouple outputs. We can also support Optris USB interfaces and CompactConnect software directly.
  • Calibrate other manufacturer’s infrared temperature sensors including Raytek, Land, Omega, Calex, DIAS and more.
Dial Gauges and Thermometers

Although most modern gauges are extremely robust, they can suffer from wear and tear and that in turn can affect their accuracy over time. Periodic gauge calibration verifies and, if needed, restores accuracy, and ensures consistent measurements.

What is Temperature Calibration?

A thermal camera in use, after being calibrated by Process Parameters
contact us now for a calibration quote

Temperature calibration is a process by which the customer’s sensor is tested under laboratory conditions against a reference measurement system which has a known accuracy at various measurement temperatures.

Immersed in fluid

Both sensors are immersed in the calibration fluid and the temperature allowed to stabilise. Once this has happened, measurements from each are taken and reported to the customer in the form of a certificate. To identify the sensor, a serial number and calibration certificate number are issued which are unique to that sensor or measurement system.

Measurement accuracy

If the instrument being calibrated is a simple temperature probe such as a thermocouple or RTD then the temperature errors are reported on the certificate and the customer will use this data within their measurement system to improve measurement accuracy. If we are calibrating a complete measurement system (ie. sensor plus measuring instrument), we can apply the measurement data and adjust the instrument to improve or eliminate any measurement inaccuracies.


All certificates refer back to the calibration equipment used and the certificate of calibration that were relevant at the time of calibration. We also record the ambient temperature at time of test and, of course, the certificate is signed off by us as a true record of the calibration procedure.

Traceable to National Standards

The service we offer is Traceable to National Standards. This means we are not an accredited laboratory, often referred to as UKAs laboratory. As a company we operate an independently accredited quality management system to ISO9001:2015 and our calibration procedures operate within this. Whilst we accept that there are plenty of cases where a UKAS calibration is necessary, we also believe that many applications can benefit from a more competitively priced traceable calibration.

Regular calibration

Temperature calibration is usually carried out at regular intervals depending on the application but most commonly on an annual basis. Under some conditions, temperature sensors can suffer from drift so it is necessary to monitor the accuracy of the system over time. We can help with planning for regular re-calibration by providing free of charge reminders that this is due. Just let us know your requirements.