Is the infrared thermometer really reliable and is its measurement accurate?
The novel coronavirus epidemic has caused a rapid increase in market demand for temperature measurement products. Infrared thermometers, like masks, have become key medical products for epidemic prevention and disaster relief. Infrared thermometer, common market names include ear thermometer, forehead thermometer, etc., is a common Class II medical device.
With the sharp increase in production and application, many people have reported online that the thermometers used in some places are inaccurate. What is the reason? How should this problem be solved? This article will analyze the factors that affect the accuracy of infrared thermometers from the perspective of product design. Body temperature measurement is divided into contact type and non-contact type. The contact type is based on the principle of negative temperature coefficient thermistor (NTC: negative temperature coefficient), and the non-contact type is based on the principle of infrared (IR: Infrared):
China's infrared temperature measurement equipment manufacturers are mainly concentrated in the Pearl River Delta and the Yangtze River Delta, which also highly coincides with the geographical distribution of the entire medical device industry. The upstream and downstream related industrial chains of infrared temperature measurement equipment are as follows:
From the perspective of upstream supply chain management, there are three most critical factors that affect the accuracy of infrared temperature measurement equipment: infrared sensor performance, optical path system, and calibration system.
Note: This article mainly discusses infrared detectors (ear thermometers, forehead thermometers) based on the thermopile principle. Regarding focal plane technology, please refer to the paper "Development of Infrared Focal Plane Detector Array Specifications" by Wang Yifeng and Huang Jiangping of the Kunming Institute of Physics. 》. The common Amphenol Sensor Company (ASTG) ZTP148-SR infrared thermopile sensor on the market, the impact of sensor performance on temperature measurement accuracy.
As an authorized distributor of Amphenol, Heilind can provide relevant services and support to the market. In addition, Heilind also supplies products from many of the world's top manufacturers, covering 25 different component categories, and focuses on all market segments and all Customers, are constantly looking for a broad product offering to cover all markets.
