Data logger validation confirms that the temperature and humidity loggers behind your compliance records are reading accurately — before an audit, a mapping study or a rejected shipment tells you otherwise. A logger that has drifted out of tolerance can quietly undermine months of cold chain data. FWC Calibration validates data loggers on site across Sydney and NSW using our mobile calibration units, and in our Werrington laboratory for units you can send in or take offline.
We work with single loggers and full fleets under our ISO 9001:2015 quality system. Whether you monitor one vaccine fridge or a whole transport network, the approach is the same: check each logger against a traceable reference standard, record the results, and issue a certificate you can hand to an auditor.
What we validate
- Temperature data loggers for fridges, freezers, coolrooms, ambient storage and transport
- Humidity data loggers and combined temperature and humidity units
- Single-point verification at your critical set point — for example 5 °C for a vaccine fridge
- Multi-point verification across the logger’s working range
- Pre-study and post-study checks for loggers used in temperature mapping and validation studies
- Alarm verification, confirming high and low alarms trigger at the configured limits
- Batch verification of logger fleets used in cold chain transport and warehousing
How data logger validation works
Each logger is compared against a reference standard in a controlled environment. For a single-point check we hold the logger at your critical operating temperature and record the deviation between the logger and the reference. For a multi-point check we repeat this at several points across the working range — typically low, middle and high — so you know the logger is accurate everywhere it operates, not just at one temperature.
Where a logger protects a critical alarm limit, we also verify the alarm: we drive the sensor past the configured threshold and confirm the alarm activates where it should. For loggers used in mapping studies, we verify them before the study and again after it, so the study data is defensible from end to end.
On-site work is usually completed the same day, with loggers returned to service as each one passes. Laboratory work typically takes three to five business days, with express turnaround of 24-48 hours when scheduled in advance. We also track every logger’s calibration due date — monthly, six-monthly or twelve-monthly — and schedule your next visit before any unit falls due, so validation never lapses between audits.
Who relies on validated data loggers
Validated loggers are the backbone of monitoring programs in several sectors:
- Pharmaceutical storage and vaccine cold chain, where the Australian ‘Strive for 5’ guidelines set clear expectations for temperature monitoring
- Food transport and storage, where logger records are commonly required under HACCP-based programs
- Hospitals, aged care and veterinary facilities monitoring medicines, blood products and specimens
- Museums, archives and collections, where stable temperature and humidity protect irreplaceable objects
- Manufacturing and GxP environments, where an unverified instrument is a standing audit finding
In each case the question an auditor asks is the same: how do you know this logger reads correctly? A current data logger validation certificate is the answer.
Traceability and certificates
Our reference standards are calibrated by NATA-accredited laboratories, so every check is NATA-traceable and linked to Australian national measurement standards. Each certificate documents the traceability chain along with the as-found readings, the reference used, the points tested and the measured deviation at each point — the evidence an auditor or customer needs before they accept your monitoring data.
Data logger validation often runs alongside our related services. Loggers used to survey a fridge, coolroom or warehouse feed directly into temperature mapping studies. The fixed sensors and chart recorders beside your loggers are covered by temperature and humidity calibration, and loggers used in steriliser qualification sit within autoclave validation. If you are not sure which service fits, request a quote and we will point you in the right direction.
Frequently asked questions
How often should data loggers be validated?
Twelve-monthly validation is the most common interval, and it is what most auditors expect as a minimum. Some GxP and cold chain programs specify six-monthly checks, and loggers used in mapping studies should be verified before and after each study regardless of their routine interval. We can recommend an interval based on how each logger is used.
Single-point or multi-point — which do I need?
If a logger only ever monitors one condition — a vaccine fridge held at 5 °C, for instance — a single-point check at that temperature is often enough. If the logger operates across a range, such as transport loggers that see both frozen and chilled loads, a multi-point check across that range is the defensible option. Many sites use a mix of both.
Can you validate loggers without interrupting our monitoring?
Yes. On site we stage the work so only a portion of your loggers is out of service at any time, and spare or rotated units can maintain coverage while each batch is checked. For laboratory work, many clients send loggers in rotation so monitoring continues uninterrupted.
For data logger validation in Sydney or anywhere in NSW — and across the ACT, VIC and NT — call FWC Calibration on 0409 663 566 or request a quote online. We respond to every enquiry within one business day.
Related calibration services
Where we calibrate
We provide this service on-site and in-lab across NSW, ACT, VIC and NT — including Sydney, Western Sydney, Melbourne and Canberra. See all calibration services or locations we cover.
Helpful reading
Learn how often you should calibrate your equipment, and understand NATA-traceable vs NATA-accredited calibration. Questions? Read our calibration FAQs or request a quote.
Read more: Temperature mapping explained
Further reading: our calibration guides and resources cover NATA traceability, calibration intervals, certificates and validation in plain English.