ET will show you how sensitive a Body Temperature Detection System
There are so many statements and articles about which BTDS (Body Temperature Detection System) products are good and which are not out there and this can cause a lot of confusion; I just want to educate companies on how to test to make the best choice since other companies have not done a good or fair job at explaining what you need to know and why. The first question we hear on a sales call is “how many people can you fit through the system at once?” This is not the question you should be asking because no one should be trying to push as many people as they can at once through a thermal detection system. From the FDA and CDC guidelines, each person must be 6 feet apart to keep social distance, so trying to allow many people through at once is just not healthy or safe.
Being a few years into this industry, it is clear that there are a lot of companies that do not know what they are doing and are making profit off of confusing their customers by making them feel as if they are getting a good deal on a system that is not accurate. That means you need to keep in mind that you shouldn’t judge these systems by which one hurts your wallet less to buy, but instead, you should judge them more on the accuracy they can offer. Usually these systems being sold at a higher price (over 9k) means you’re getting a proper sensor that is required to make these sensitive calculations of temperature readings. The following tests will actually help you decide which system is good and which you should not purchase.
It is fact that the inner eye is closest to the body core so for our test we will use what we call the ET test. No, not the little alien who just wants to phone home, although it would that be cool to see him back! We are talking about the eyes. Technology like Athena uses 1,000 or more different points, the eyes are just one of them( note closeryou are the more detailed readings you will have). If you want to learn more on why the inner eye itself is not the only point that should be scanned, check out this article! https://iovs.arvojournals.org/article.aspx?articleid=2127035
But for the purpose of showing the sensitivity of your equipment, we will use the ET test.
ET test works because glass is one thing these types of technologies cannot see through. Please see the test image below. The person is seen on the visual camera on the right, but the infrared camera cannot see the person behind the glass on the left.
Thus the ET test is done by a person with glasses to block the inner eye reading. This will show how sensitive your equipment really is or is not. If the system is not affected by at least 0.2 or 0.3 degrees when glasses come on and off, chances are your equipment is not sensitive enough and you should move on.
ET test glasses off subject and reading 96.7 degrees F
ET test glasses on subject and reading 96.4 degrees F
The point of the ET test is to test the inner eye which is the closest part of the body to your core temperature. I am not saying the inner eye is the only spot you should only look at. In the article it will explain its results and that is why we use 1,000 different points on the face. So, any companies that only look at the eyes, you should steer clear as it is not going to give accurate results from those types of devices. There is a lot we can talk about, but this is the best way to test the sensitivity of your equipment. Refer to the images above and notice that there was a 0.3 degrees F difference; that is more than half of a degree change in F. High temperatures that are detectable to be fevers run at 100.4 and our core temperature is 98.6 so that is a 1.8 degree F separation so when detecting high temperatures, we cannot give up a half of a degree if the system is not sensitive enough.
In conclusion body temperature systems that cannot pass the ET test should not be used to detect high temperatures as they are not sensitive enough.
See Video for above images