Temperature measurement is part of almost every food manufacturing process. From pasteurisation and cooking to cooling, storage and process control, manufacturers rely on temperature instruments to provide an accurate picture of what is happening on the production line, but having a temperature reading isn’t the same as having a measurement you can trust. A sensor can continue to produce a reading while its accuracy gradually changes. When that measurement is being used to control a process, verify a critical temperature or make a production decision, even a small error can have consequences.
Why does temperature accuracy matter in food manufacturing?
For food manufacturers, temperature is often closely connected to product quality, process consistency and food safety. A temperature measurement may be used to confirm that a process has reached a required temperature, control heating or cooling, monitor a production stage or identify a change in process conditions.
If the instrument measuring that temperature isn’t performing as expected, the issue isn’t simply an inaccurate number. It can affect the information being used by production, engineering and quality teams to make decisions. That’s why temperature calibration should be considered part of the wider process, rather than simply an annual maintenance task.
What happens when temperature measurements drift?
Temperature instruments operate in demanding environments. Over time, factors such as age, process conditions, mechanical damage and general wear can affect their performance.
The challenge is that measurement drift isn’t always obvious. A sensor may still be communicating with the control system and displaying a temperature, but that doesn’t necessarily mean the temperature is accurate. Without regular calibration, it can be difficult to know whether the measurement remains within the tolerance required for the application. For critical processes, that uncertainty can introduce unnecessary operational risk. Temperature calibration compares an instrument’s reading against a known reference to establish how it is performing at defined points.
The result provides evidence of the instrument’s performance at the time of calibration. Where an instrument is outside the required tolerance, further action can be taken, whether that means adjustment, repair or replacement. Just as importantly, calibration creates a documented record of what was tested, the results obtained and the equipment used. For food manufacturers, that traceability matters. Engineering and quality teams need to be able to demonstrate not only that an instrument was calibrated, but also what the calibration showed.
Calibration should be built around the process
There isn’t a single calibration approach that works for every temperature instrument. The required tolerance, measurement range, instrument type and application all need to be considered. A temperature probe used in a critical production process may have very different requirements from an instrument used for general environmental monitoring. This is where an understanding of the process becomes important.
At BONNER, calibration sits alongside our wider instrumentation and automation expertise. Our technicians work with manufacturers to understand the application, the instrument and what the measurement is being used for. That means calibration isn’t treated as an isolated task. Where an issue is identified, our team can also investigate the wider instrumentation or measurement system and help determine what needs to happen next.
Why on-site calibration can make sense
For many food manufacturers, removing instruments from the production environment isn’t always practical.
Equipment may be installed directly into a process, connected to a control system or difficult to access. Taking instruments away for calibration can also introduce additional disruption, particularly where production schedules are tight.
On-site calibration allows instruments to be assessed within the manufacturing environment, reducing unnecessary removal and helping manufacturers manage calibration around their operations.
It can also provide a better opportunity to understand the instrument in the context of the process it is supporting.
BONNER provides on-site calibration across Ireland, supporting food, beverage and dairy manufacturers with temperature, pressure, flow, pH, weighing and other process instrumentation.
Temperature calibration in food and dairy processing
Temperature measurement plays a particularly important role in food and dairy manufacturing.
Pasteurisation, cooking, cooling and other thermal processes depend on accurate measurement to help operators understand whether the process is performing as expected. Temperature instruments are also used throughout production, storage, CIP systems and laboratory environments.
Our experience includes supporting manufacturers with temperature calibration where the measurement itself is critical to the process.
For example, BONNER worked with Pilgrims Carrickmacross to develop a calibration approach for temperature probes that needed to be tested at three temperature points within a defined tolerance. The solution was developed around the size of the probes and the requirements of the production process, while also allowing the complete measurement loop through to the PLC and HMI to be verified. It’s a good example of why calibration isn’t always a standard, one-size-fits-all exercise. The right approach needs to reflect the instrument and the process.
Calibration is about more than the certificate
A calibration certificate is an important record, but the real value of calibration is the confidence it provides in the measurement.
When production, engineering and quality teams know that their critical instruments have been checked, their results are documented and any issues have been identified, they have a stronger basis for making operational decisions.
And when an instrument is found to be outside tolerance, identifying that early gives the manufacturer an opportunity to investigate the cause and understand whether further action is required.
For BONNER, that’s where calibration connects with our wider approach to manufacturing support.
Need on-site temperature calibration?
BONNER provides on-site calibration services for food, beverage, dairy and manufacturing environments across Ireland.
Our team can support planned calibration programmes as well as instruments requiring investigation, adjustment or wider instrumentation support.
Explore our On-Site Calibration Services or