战“疫”手册：为什么疫情期间要使用额温枪量体温？

自新冠肺炎疫情发生以来，筛查体温已经成为各有关单位、家庭做好防控工作的重要手段。

而在检测体温时，大多数人选择了额温枪，而不是常见的耳温计或水银温度计。这是为什么呢？

额温枪又被称为红外线测温仪。自然界中，任何高于绝对零度（-273℃）的物体都会发出红外辐射能量，通过对这种能量的测量就可以读取物体表面的温度。这就是额温枪的工作原理。

因为额温枪具备非接触、测量快、使用场景灵活等优势，所以成为了检测体温的重要工具。

Since the outbreak of novel coronavirus, temperature checks have become routine in neighborhoods and workplaces. And staff prefer to use the forehead thermometer, rather than the ear or mercurial ones.

Forehead thermometer, also known as the infrared thermometer, takes one's temperature by sensing the infrared energy radiated by the human body, as all materials emit infrared energy when the temperature is above absolute zero (-273 degrees Celsius).

The process won't cause any damage to the human body because the measurement is done by the absorption and detection of infrared energy.

Why choose the forehead thermometer?

Using the infrared thermometer to check the body's temperature requires a short amount of time without the risk of cross-infection. Therefore it's well-suited for use in places with a high flow of people. 

When using a forehead thermometer, point the instrument toward the center of the forehead and keep a distance of three to five centimeters. Make sure the forehead is not covered or wet to diminish inaccuracy. 

It will be more accurate to measure the temperature of clothes-covered parts when outdoor, like the wrist and neck.

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