In the production process, infrared optical temperature measurement technology plays an important role in product quality control and monitoring, equipment online fault diagnosis and safety protection, and energy saving. In the past 20 years, non-contact infrared thermometers have developed rapidly in technology, with constantly improving performance, increasing functions, increasing varieties, expanding scope of application, and increasing market share year by year. Compared with the contact temperature measurement method, infrared temperature measurement has the advantages of fast response time, non-contact, safe use and long service life. Non-contact infrared thermometers include portable, online and scanning three series, and have various options and computer software, each series has various models and specifications. Among various types of thermometers with different specifications, it is very important for users to choose the correct model of infrared optical thermometer.

The method of using a thermal imager to detect online electrical equipment is infrared thermography. Infrared thermography is a new technology used in industry for non-destructive detection, testing equipment performance and mastering its operating status. Compared with traditional temperature measurement methods (such as thermocouples, wax sheets with different melting points, etc. placed on the surface or body of the object to be measured), the thermal imager can detect the temperature of the hot spot in real time, quantitatively, and online within a certain distance. , It can also draw the temperature gradient thermal image of the equipment in operation, and it has high sensitivity and is not disturbed by electromagnetic fields, which is convenient for on-site use. It can detect thermally-induced faults in electrical equipment with a high resolution of 0.05°C in a wide range of -20°C to 2000°C, revealing heating of wire joints or clips, and local hot spots in electrical equipment, etc.