Tell you: How to choose the correct infrared thermometer
Infrared temperature measurement technology plays an important role in product quality control and monitoring, equipment online fault diagnosis, protection and energy conservation. In the past two decades, non-contact infrared thermometers have developed rapidly in technology, their performance has continued to improve, their scope of application has continued to expand, and their market share has increased year by year. Compared with contact temperature measurement methods, infrared temperature measurement has a faster response time. Non-contact, long use and service life.
Infrared thermometer products include portable, online and scanning types, and are equipped with various optional accessories and corresponding computer software. The correct choice of infrared thermometer is very important for users. Here we only put forward the thinking steps on how to correctly choose a thermometer for buyers' reference.
How does the infrared thermometer work?
Understanding the working principle, technical indicators, working environment conditions, operation and maintenance of infrared thermometers is to help users choose and use infrared thermometers correctly.
All objects with a temperature above zero are constantly emitting infrared radiation energy into the surrounding space. The infrared radiation characteristics of an object-the size of the radiation energy and its distribution by wavelength-are closely related to its surface temperature. Therefore, by measuring the infrared energy radiated by the object itself, its surface temperature can be accurately measured. This is the objective basis on which infrared radiation temperature measurement is based.
Main factors affecting emissivity
Material type, surface roughness, physical and chemical structure and material thickness, etc.
When using an infrared radiation thermometer to measure the temperature of a target, the amount of infrared radiation of the target within its band range must first be measured, and then the temperature of the measured target is calculated by the thermometer. A single-color thermometer is proportional to the amount of radiation within the band, and a two-color thermometer is proportional to the ratio of the amount of radiation in the two bands.
Temperature measurement range is the most important performance indicator of a thermometer. The temperature ranges from -50 to 3000°C, but this cannot be accomplished by one type of infrared thermometer. Each model of thermometer has its own specific temperature measurement range. Therefore, the temperature range of the measured object must be considered accurately, neither too narrow nor too wide. According to the blackbody radiation law, the change in radiant energy caused by temperature in the short-wavelength band of the spectrum will exceed the change in radiated energy caused by the emissivity error. Therefore, it is better to use short wave when measuring temperature.
