When is Thermal Temperature Screening Accurate?
When used correctly, thermal temperature screening provides the best, quickest, and most accurate results when measuring a person's temperature without being physically close to them. This is of great importance as COVID-19 spreads from person to person, and the only way to avoid it is to avoid contact. That is the reason thermal screening cameras are beneficial.
When is Thermal Temperature Screening not Accurate?
Thermal temperature screening may not be accurate when detecting if someone has the Coronavirus, as it is not necessary for a person who is sick to have a high temperature. Nevertheless, this is not up to the device. The device, however, can still show false results if it is not set up and used correctly, like, for example, taking the temperature of multiple people at once. Below, we explain how the area for measurements, the people being evaluated, and the device need to be assembled to get accurate results.
Preparing the Area for Accurate Results
The room temperature needed for reliable results is from 20° C to 24° C and the relative humidity from 10% to 50%. Some things could affect the temperature measurement, such as reflective backgrounds like glasses or mirrors. The room the measurement takes place in should be without a draft, out of direct sunlight, and away from radiant heat.
Preparing the Person for Accurate Results
The person being assessed must not exercise at least half an hour before the measurement, or be engaged in any kind of physical activity that might increase their temperature. What might also enhance their temperature is wearing excessive clothing or head covers, and anything on their faces such as masks, glasses, or scarfs, which should also be removed beforehand.
Preparing the Thermal Imaging Camera for Accurate Results
Like the person being assessed should wait half an hour beforehand, it is the same with the temperature screening device but in this case, the system should have a chance to warm up before use. Some systems also demand the use of a calibrated blackbody during the measurement to get reliable results.
Thermal temperature screening is extremely accurate when taking people's temperatures, but it cannot diagnose COVID-19, as a high body temperature is only one of the many potential symptoms. The device does not detect any other virus symptoms, and several people with COVID-19 can be infectious even without a fever. That is why all fevers measured should be followed by another method that would recognize if a person is infected with the Coronavirus or not.