Temperature Traceability & Calibration Certificates
Traceability means a measurement can be traced through an unbroken chain of calibrations back to a national or international temperature standard. On a calibration certificate, check: what standard it traces to, the measurement uncertainty (± value and confidence level), and the calibration points and conditions. Only with a complete chain do the spec numbers become trustworthy.
What the traceability chain is
- Your measuring device → working standard (e.g., a blackbody source) → reference standard (calibration lab) → national standard → SI units, each tier linked to the one above by a calibration certificate.
- If any link lacks calibration, the chain is broken and the result loses its trustworthy reference.
Five fields to check on a certificate
- The reference standard and lab, calibration points (temperatures), measurement uncertainty, environmental conditions, and date/validity.
Reading the uncertainty
- Uncertainty is usually given as a ± value with a confidence level (e.g., k=2, 95%); a smaller number means more reliable. It quantifies the range the true value likely falls in (see also: what is temperature uncertainty).
Why Hotech can speak to this
- Temperature calibration is Hotech's core business — making blackbody temperature standards and calibration equipment, with a long-standing understanding of traceability and uncertainty.
Related Products
- Low-Temperature High-Uniformity Blackbody 360 →
- What Is Temperature Uncertainty →
- Why Use a Blackbody as Reference →
FAQ
Is a certificate without uncertainty acceptable?
Not recommended. Without uncertainty you can't judge the reliable range; a proper certificate should state both uncertainty and the reference standard.
How often should I calibrate?
It depends on usage, equipment stability and QC policy; medical and calibration units usually set a regular schedule.
In-house vs. factory calibration?
In-house is convenient but needs traceable standards and capability; factory/lab calibration yields a formal traceable certificate. In practice both are often combined.