COVID-19 has generated immense interest in thermal imaging cameras as a tool to identify individuals with elevated body temperatures. We’ve put together a collection of Frequently Asked Questions FAQs about thermal imaging cameras to help you understand the technology.

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While thermal imaging cameras camera cannot detect or diagnose a virus, they can alert you to an individual's elevated body temperature which may indicate the presence of a fever, a symptom of viruses including Coronavirus (COVID-19). Thermal imaging cameras are not medical devices but they can be effective as a preliminary screening tool to detect individuals with a higher body temperature so that they can be safely isolated and referred for medical assessment, minimising contamination at your site and mitigating risks of that person coming into contact with others.
Any object with a temperature above absolute zero emits a detectable amount of infra-red (IR) radiation. The higher an object’s temperature, the higher intensity of emitted IR. Taking advantage of the differences in IR intensity between objects, thermal cameras make the invisible IR “visible” in the form of heat zone images. The cameras provide colour images and temperature scales, and sound alarms that can be set to go off when a certain temperature threshold is exceeded.
The cameras accurately screen temperature to within +/- 0.3°C (with blackbody).
About 37°C (98.6F). A high temperature is usually considered to be 38°C or over.
Up to 30 targets can be measured at the same time.
The camera has a range of up to 3m distances, depending on the environment.
Yes, the threshold can be adjusted to reflect the environmental conditions the thermal imaging camera is operating in.
Heat radiating from the skin will likely be impacted by wearing a face mask or face covering. That's why temperature measurements are based on the forehead, which is usually exposed.
We recommend the thermal imaging camera is used in a windless indoor environment for more accurate results, as changes in outside conditions can have an impact.
We do not handle or access any of the data generated by the solution – this makes it easier for our customers to manage and control data and the privacy of their staff and customers in line with existing policies. Employers must also handle the information they gather fairly and transparently - according to the Information Commissioner.