SAC-SINGLAS Accredited · ISO/IEC 17025
Thermal Imager Calibration
Unitest provides SAC-SINGLAS accredited thermal imager calibration in Singapore from 35 C to 500 C, against a traceable reference blackbody source, under method UNI-T008, with measurement uncertainties (CMC) from 1.1 C to 3.7 C.
What is thermal imager calibration?
Thermal imager calibration verifies how accurately the camera measures temperature. The imager is aimed at a reference blackbody source of known, controlled temperature and near-unity emissivity, the source is stepped through each calibration point, and the temperature the imager reports is compared against the true value. The deviation is recorded across the range and reported with its measurement uncertainty, under method UNI-T008 from 35 C to 500 C.
SS 582 and fever-screening context
In Singapore, SS 582 is the recognised benchmark for thermal imagers used in fever screening: a compliant imager should read within 0.3 C of a reference blackbody within the workable target plane. It is the standard auditors and facilities managers point to when a thermal camera is used to screen people.
Unitest calibrates your imager against a traceable reference blackbody, consistent with this recognised practice, and reports the measured error and uncertainty. To be clear on scope: we do not issue an SS 582 conformity certificate unless that specific assessment is agreed in advance. If fever-screening compliance is your goal, tell us and we will confirm exactly what the calibration will and will not certify before you commit.
Why and when to calibrate a thermal imager
Thermal imagers drift through detector ageing, lens and window contamination, mechanical shock and firmware or emissivity settings. Calibrate a new imager before it goes into a measurement role, then at least annually, more often where the readings drive safety or screening decisions, and after any drop or repair.
The accredited range for non-contact infrared and thermal instruments is 35 C to 500 C under method UNI-T008, with CMC uncertainties from 1.1 C to 3.7 C. Standard turnaround is 5 to 7 working days, with a 2 to 3 day express option, and free collection and delivery across Singapore for orders of S$300 and above.
What we calibrate
Thermal Imager instruments we calibrate
- Thermal imaging cameras
- Thermographic inspection cameras
- Fever-screening thermal cameras
- Building & electrical thermal imagers
- Handheld & fixed radiometric imagers
Accredited under SAC-SINGLAS LA-2023-0845-C. View our accreditation & scope →
Questions
Thermal Imager calibration FAQ
Is thermal imager calibration SAC-SINGLAS accredited?
Yes. Thermal imager calibration falls under our SAC-SINGLAS accredited non-contact temperature scope, method UNI-T008, from 35 C to 500 C against a traceable blackbody source. Certificates are issued under our ISO/IEC 17025 accreditation, LA-2023-0845-C, with stated measurement uncertainty at each point.
What is SS 582 and do you certify to it?
SS 582 is Singapore's recognised benchmark for thermal imagers used in fever screening, requiring the imager to read within 0.3 C of a reference blackbody within the workable target plane. We calibrate your imager against a traceable reference blackbody consistent with this recognised practice, but we do not issue an SS 582 conformity certificate unless that specific assessment is agreed in advance. Tell us your goal and we will confirm the scope up front.
How is a thermal imager calibrated?
By comparison against a reference blackbody source. The imager is aimed at the blackbody, which is set to each temperature point across the range, and the temperature the imager reports is compared with the true source temperature. The deviation is recorded and reported with its expanded measurement uncertainty. Emissivity and distance are controlled so the certificate reflects the imager itself.
How often should a thermal imager be calibrated?
At least once every 12 months for general measurement use, and more frequently where the imager drives safety, compliance or fever-screening decisions. Recalibrate after any drop, lens or window contamination, or repair. Your quality or screening protocol will usually set the required interval.
Range information
Non-contact infrared thermometer / thermal imager, method UNI-T008. Range 35 C to 500 C, CMC 1.1 C to 3.7 C. Emissivity 0.90 to 1.00, spectral band 8 to 14 micrometres. Refer to the SINGLAS schedule LA-2023-0845-C for the full accredited range.
Accredited ranges
Thermal Imager calibration ranges & measurement uncertainty
The parameters, ranges and calibration & measurement capability (CMC) below are taken from our SAC-SINGLAS Schedule of Accreditation (LA-2023-0845-C, to ISO/IEC 17025). CMC is the smallest measurement uncertainty we can achieve under accredited conditions.
Non-Contact Temperature Infrared Thermometer / Thermal imager (Emissivity: 0.90 – 1.00; Spectral Band: 8 to 14 µm)· UNI-T008 Rev:0
| Range / measured quantity | Measurement uncertainty (CMC) |
|---|---|
| 35 °C – 100 °C | 1.1 °C |
| >100 °C – 200 °C | 2.1 °C |
| >200 °C – 350 °C | 2.6 °C |
| >350 °C – 500 °C | 3.7 °C |
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