SAC-SINGLAS Accredited · ISO/IEC 17025
Infrared Thermometer Calibration Singapore
Unitest calibrates non-contact infrared thermometers in Singapore across 5 °C to 500 °C, under SAC-SINGLAS accreditation LA-2023-0845-C (ISO/IEC 17025). Standard turnaround is 5–7 working days; express service is 2–3 days, with free collection and delivery in Singapore for orders above $300.
Also known as: Non-Contact Infrared (IR) Gun · IR Gun · Laser Thermometer
Why calibrate?
Unitest calibrates non-contact infrared thermometers in Singapore over a range of 5°C to 500°C, using a traceable blackbody reference, with SAC-SINGLAS accredited ISO/IEC 17025 certificates. IR thermometers drift at the detector level and with lens contamination. Calibration confirms the temperature reading at distance is accurate.
What is infrared thermometer calibration?
An infrared thermometer (also called a radiation thermometer, IR gun or non-contact thermometer) measures temperature from the infrared energy a surface emits, without touching it. That makes it ideal for hot, moving, energised or hard-to-reach surfaces, but it also means its accuracy depends on emissivity, distance and optics, all of which can drift.
Infrared thermometer calibration verifies and documents how accurately an IR thermometer reads temperature from a distance. The instrument is aimed at a reference blackbody source (a cavity of known, controlled temperature and near-unity emissivity), the source is set to each calibration point, and the thermometer's reading is compared against the true temperature. The deviation is recorded across the range and reported with its measurement uncertainty.
How the calibration is performed: blackbody, emissivity and spectral band
Three parameters govern a meaningful IR calibration, and Unitest states all three on the certificate. The reference is a traceable blackbody source. The emissivity setting is 0.90 to 1.00, matching the high-emissivity surfaces most IR thermometers are used on. The spectral band is 8 to 14 micrometres, the region most general-purpose infrared thermometers operate in.
Emissivity is the single biggest source of real-world error: a surface that emits less efficiently than the thermometer assumes will read low. Calibrating against a known blackbody at a defined emissivity setting lets you separate instrument error from surface effects, so the certificate reflects the thermometer itself.
Why and when to calibrate an infrared thermometer
Reliable non-contact readings matter for food safety checks, HVAC and electrical inspection, plastics and manufacturing process control, and any setting where you cannot, or should not, touch the surface being measured.
IR thermometers drift through optical contamination, detector ageing, mechanical shock and battery effects, and because they are often used for quick spot checks, an out-of-tolerance unit can go unnoticed for a long time. Calibrate a new instrument before use, then at least annually, more often for critical food-safety or process roles, and after any drop or repair.
Unitest's accredited non-contact range runs from 5 C to 500 C under method UNI-T008, with CMC uncertainties from 0.9 C up to 5.8 C at the top of the range. 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.
This page focuses on handheld infrared thermometers and IR guns. For the industrial side, fixed-mount pyrometers on furnaces, kilns and production lines, see radiation thermometer and pyrometer calibration, and for cameras see thermal imager calibration. All three use the same accredited method, UNI-T008.
Infrared Thermometer types we calibrate
- Handheld infrared thermometers (IR guns)
- Non-contact food thermometers
- Dual contact / non-contact thermometers
What you receive
What infrared (IR) thermometer calibration at Unitest covers
Traceable certificate
Calibration certificate with an unbroken traceability chain to national and international standards, recording the as-found condition before any adjustment.
Stated uncertainty
Results reported with measurement uncertainty, so you know exactly how much confidence each reading carries in your quality system.
5–7 day turnaround
Standard turnaround 5–7 working days; express 2–3 working days on request. Free collection and delivery within Singapore for orders above S$300.
Part of our non-contact temperature (ir) calibration service, accredited under SAC-SINGLAS LA-2023-0845-C.
How often
How often should a infrared (IR) thermometer be calibrated?
IR thermometers should be calibrated every 12 months, or after any lens contamination, mechanical damage or out-of-range exposure.
Accredited ranges
Infrared (IR) Thermometer 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) |
|---|---|
| 5 °C – 35 °C | 0.9 °C |
| 35 °C – 100 °C | 1.1 °C |
| >100 °C – 200 °C | 4.9 °C |
| >200 °C – 350 °C | 5.7 °C |
| >350 °C – 500 °C | 5.8 °C |
You can also verify our accreditation on the SAC-SINGLAS directory.
Questions
Infrared (IR) Thermometer calibration FAQ
How often should a infrared (IR) thermometer be calibrated?
IR thermometers should be calibrated every 12 months, or after any lens contamination, mechanical damage or out-of-range exposure.
Is infrared (IR) thermometer calibration accredited?
Yes. Infrared (IR) Thermometer calibration is covered under our SAC-SINGLAS scope of accreditation (LA-2023-0845-C, ISO/IEC 17025), covering 5 °C to 500 °C. Certificates state the measured values and measurement uncertainty, traceable to national and international standards. Where an instrument falls outside the accredited ranges, we can calibrate it as a traceable service instead.
How long does infrared (IR) thermometer calibration take?
Standard turnaround is 5 to 7 working days; express service is 2 to 3 working days. Collection and delivery in Singapore are free for orders above $300.
Can you calibrate my brand of infrared (IR) thermometer?
Almost certainly. The makes listed on this site are simply the ones customers most commonly send in. Send us the make and model and our engineers will confirm whether it falls within our accredited scope or can be calibrated as a traceable service.
What emissivity and spectral band do you calibrate at?
We calibrate at an emissivity setting of 0.90 to 1.00 against a reference blackbody source, over a spectral band of 8 to 14 micrometres. This matches how most general-purpose infrared thermometers are built and used, on high-emissivity surfaces in the long-wave infrared region.
Why does emissivity matter for an infrared thermometer?
Emissivity describes how efficiently a surface radiates infrared energy compared with a perfect blackbody. If the real surface emits less than the thermometer's emissivity setting assumes, the reading comes out low. Calibrating against a known blackbody at a defined emissivity separates the instrument's own error from surface effects, so you know whether a field discrepancy is the thermometer or the target.
Which method is infrared thermometer calibration accredited under?
Non-contact infrared thermometer calibration is on our SAC-SINGLAS accredited schedule under method UNI-T008, from 5 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.
Related
Related instruments
Thermal Imaging Camera
Thermal Imaging Camera calibration →Browse every instrument type on the Find Your Instrument page.
Need infrared (IR) thermometer calibration?
Submit your instrument list and we'll confirm capability, turnaround and pricing, no obligation.