When the ear thermometer is invoiced, the commodity category name is: special diagnostic equipment, the tax classification code is109024501000000000, and the commodity category is abbreviated as: medical equipment.

Basic introduction

Ear thermometer is a non-contact telemetering temperature measuring instrument (the telemetering distance is about one centimeter). It determines the body temperature by detecting the infrared spectrum emitted by the tympanic membrane (equivalent to the inferior colliculus). According to the blackbody radiation theory, the infrared spectrum generated by objects with different temperatures is different. It is displayed by using the thermopile infrared detector with the accuracy of 0. 1℃, and then the reading is converted by a microcomputer.

Ear thermometer usually uses a thermopile sensor, which includes the above-mentioned optical system, photodetector thermopile and thermistor. The far infrared radiation intensity of human tympanic membrane 6- 15μm was detected by thermopile sensor. This measurement result is a relative quantity, that is, the obtained result is related to the radiation intensity of the measured object and the temperature of the thermopile itself.

The thermistor is used to measure the temperature of the thermopile itself. By calculating the radiation intensity and the temperature of the thermopile itself, the temperature of the measured object can be obtained.