As a rule of thumb, the closer you are to the target, the smaller the measurable surface area is, thus the more accurate the measurement.
However, scanning the forehead may make the temperature reading less accurate.
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When scanning the forehead, make sure the hair of the targeted person doesn't cover it.
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Now after making sure you've got the right infrared thermometer gun, just follow the instructions below to utilize the gun for accurately detecting the body temperature step by step.
This outlet occupies a total of 18,000 square feet and consists of 64 karaoke rooms, then considered the largest karaoke outlet.
Nevertheless, it's really unrealistic to measure the armpit temperature at public places since lifting the clothes is unsuitable.