A sensor does not announce when it starts to drift. It keeps reporting numbers that look reasonable, and the first sign of trouble is an auditor asking when it was last checked, or a batch that was never as cold as the log says it was.
What calibration actually involves
- Agree the pointsWe set the temperatures to test at — normally the limits your process cares about plus points in between, not just room temperature.
- Compare against a referenceYour sensor and a reference instrument of known accuracy are held at each point until both are stable, and the difference is recorded.
- Adjust if neededWhere the sensor can be adjusted and the error justifies it, it is corrected and re-checked.
- Issue the certificateYou receive a certificate listing each point with the as-found and as-left readings, the reference used and the date.
What we calibrate
- Fixed temperature and humidity sensors in warehouses and cold rooms.
- Reefer and vehicle temperature probes.
- Portable data loggers, including the loggers used in mapping studies.
- Sensors feeding our monitoring system and the alerts built on them.
On site or in the laboratory
| Where | When it suits |
|---|---|
| On site | Sensors that cannot be removed, or a whole site checked in one visit with minimal disruption. |
| In the laboratory | Portable loggers and probes, and cases where a tighter, more controlled comparison is needed. |
How often
Calibration is a cycle, not a one-off. The interval comes from your quality system, the regulator you answer to and how critical the measurement is — commonly annual, and sooner after a sensor is moved, repaired, dropped or found reading oddly. We can hold the schedule for your sites and tell you what is due.
Tell us how many sensors, where they are, the temperature range they work across, and whether your auditor requires an ISO/IEC 17025 accredited certificate. We will confirm what we issue directly and what we arrange through an accredited laboratory, so there is no ambiguity in front of an inspector.
Where it fits
A heat map study tells you where to put sensors. Calibration keeps those sensors honest afterwards. Together with continuous temperature and humidity monitoring, they are what turns a cold room into a cold room you can prove. Ask about a calibration schedule.