What are the advantages of human infrared thermometer for measuring human body temperature?
Infrared thermometers used to test human body temperature are called human infrared thermometers. But it must be clarified that there is no special medical or industrial infrared thermometer, because the manufacturing principles of infrared thermometers are the same. There are only high-precision, high-distance-coefficient ratio, high-performance infrared thermometers and low-precision, low-distance-coefficient ratio, and low-performance infrared thermometers. As long as the emissivity of the infrared thermometer is set to 0.95 (the emissivity of human skin is generally this value, even if there is a difference, the impact will only be within 0.3 degrees), it meets the requirements for human body temperature measurement. (For example: all brands of cars can run 40 yards, and ** cars may be able to reach 200 yards, but there is no distinction between cars that are specialized in running 40 yards and cars that are specialized in running 200 yards. There are only cars with high and low performance. the difference.)
Advantages of using infrared thermometer to measure human body temperature
1. Non-contact, no need to touch the other person when measuring human body temperature, avoiding the risk of infection and ensuring safety
2. Rapid temperature measurement and accurate reading, suitable for quickly screening large groups of people
3. There is no need to enter the other person’s ear canal when measuring body temperature, and there is no need to replace the earmuffs. It is clean and hygienic.
4. Laser positioning, accurately measure the temperature of the target part, and can measure the temperature of the forehead, armpit, body surface, etc.
5. The temperature limit can be set. When the temperature exceeds the limit, an audible alarm will sound to accurately identify those with abnormal body temperature in the crowd.
6. Infrared thermometer, harmless to human body
What is the distance coefficient of infrared thermometer?
The distance coefficient is determined by the ratio D:S, which is the ratio of the distance D between the thermometer probe and the target to the diameter of the measured target. If the thermometer must be installed far away from the target due to environmental conditions, and small targets need to be measured, a thermometer with high optical resolution should be selected.
The higher the optical resolution, that is, the higher the D:S ratio, the higher the cost of the thermometer. Raytek Infrared Thermometer D:S ranges from 2:1 (low distance factor) to over 300:1 (high distance factor). If the thermometer is far away from the target and the target is small, a thermometer with a high distance coefficient should be selected.
For a thermometer with a fixed focal length, the focus of the optical system is the smallest position of the light spot. The light spot will increase both near and far from the focus position. There are two distance coefficients. Therefore, in order to accurately measure temperature at distances close to and away from the focus, the size of the target to be measured should be larger than the spot size at the focus;
The zoom thermometer has a minimum focus position that can be adjusted based on the distance to the target. Increasing D:S will reduce the received energy. If the receiving aperture is not increased, it will be difficult to increase the distance coefficient D:S, which will increase the cost of the instrument.
