What are the precautions for using infrared thermometers
The advantages of infrared temperature measurement: First, there is no contact with the measured object, and unnecessary infection will not be caused when measuring body temperature; second, it is fast, usually the measurement time is less than 1 second, and generally does not exceed 2 seconds. Therefore, it is very suitable for application in the prevention and detection of fever diseases.
Usually, when the human body temperature is around 37°C, the accuracy of the infrared thermal imaging body temperature rapid screening instrument can reach ±0.3°C, and the infrared thermometer can reach ±0.2°C.
In terms of measurement accuracy, the infrared ear thermometer has the highest measurement accuracy, followed by the infrared forehead thermometer. However, if the measurement method is not correct, the measurement results will also be inaccurate. For newly purchased human infrared thermometers, or when they are used frequently and have doubts about the measurement results, the human infrared thermometer should be calibrated to determine its correction value, which can eliminate the systematic error of the thermometer as much as possible.
The blackbody radiation source can be used to calibrate the human body infrared thermometer. Its effective emissivity and temperature control stability have higher requirements. The blackbody temperature is usually measured with a contact thermometer such as a platinum resistance thermometer or a liquid-in-glass thermometer, and its temperature is related to
Special Note: It is not recommended to use infrared thermometers for industrial testing to measure human body temperature.
Infrared thermometers for industrial testing usually have a lower limit of the measurement range of -20°C to -30°C, and an upper limit of 200°C to 1000°C. The measurement range is wide and the accuracy is low. Generally, it is not better than ±1.0 near the human body temperature. ℃. Therefore, it is not appropriate to use an infrared thermometer for industrial testing to measure human body temperature only from the requirements of measurement accuracy.
