Five temperature measurement places that will affect the measurement accuracy of infrared thermometers
One: Strong electromagnetic field interference "The strong electromagnetic field environment will cause the output signal of the infrared thermometer to be distorted and fluctuate in a large range. It should be shielded until it has good anti-electromagnetic interference capabilities.
Two: High temperature environment This environment is easy to melt the coating material of the infrared thermometer, soften the solder joints, change the internal stress structure of the elastomer, and so on. In this environment, a high temperature resistant infrared thermometer should be used; ordinary online thermometers cannot be used. The solution is to choose a high temperature thermometer and add heat insulation, water cooling or air cooling and other devices.
Three: Corrosive environment Infrared thermometers work in a corrosive environment, which is likely to cause damage to the shell, damage the inner elastomer, and even cause a short circuit. Therefore, infrared thermometers with good corrosion resistance and good airtightness should be selected. instrument. Generally choose a product with a stainless steel cover or an anti-corrosion treatment on the surface.
Four: Dusty, humid environment In this kind of environment, an infrared thermometer with a tight airtightness should be selected, otherwise it will easily cause a short circuit of the infrared thermometer. You can refer to the IP protection grade of the infrared thermometer to select the corresponding product. Moreover, different infrared thermometers have different sealing methods, and the airtightness must be different. Commonly used sealing methods are effective sealant filling or coating; rubber pad machine fastening and sealing; welding and vacuum pumping and nitrogen filling for sealing. Among these sealing methods, welding and sealing are the best, followed by rubber pad machine fastening and sealing, and filling and coating sealant are the worst. For places that generally require less strict sealing, you can choose a glue-coated and sealed infrared thermometer, and for some infrared thermometers that work in humid and dusty environments, the sealing method should be selected through Products that are heat-sealed or welded, vacuum-filled and nitrogen-filled.
5. Improper selection of flammable and explosive environments Infrared thermometers in flammable and explosive environments will permanently damage them, and the inaccurate signals output by them will be sent to the control system, resulting in misuse and even setting up other things. Threats to equipment deployment and personal security. Therefore, in order to carefully choose an infrared thermometer for working in this environment, explosion-proof performance must be used. It not only needs to be airtight, but also takes into account the explosion-proof strength. Its cable outlets also need to meet such requirements.
