Advantages, Disadvantages and Precautions for Use of Infrared Thermometers
Advantages of infrared thermometers
1. Non-contact measurement: It does not need to come into contact with the interior or surface of the temperature field being measured. Therefore, it will not interfere with the state of the temperature field being measured, and the thermometer itself will not be damaged by the temperature field.
2. Wide measurement range: Because it is a non-contact temperature measurement, the thermometer is not in a higher or lower temperature field, but works at normal temperature or conditions allowed by the thermometer. Under normal circumstances, it can measure negative tens of degrees to more than 3,000 degrees.
3. Fast temperature measurement: fast response time. As long as it receives the infrared radiation of the target, the temperature can be fixed in a short time.
4. High accuracy: Infrared temperature measurement will not destroy the temperature distribution of the object itself like contact temperature measurement, so the measurement accuracy is high.
5. High sensitivity: As long as there is a slight change in the temperature of the object, the radiation energy will change greatly, which is easy to measure. It can perform temperature measurement and temperature distribution measurement of small temperature fields, as well as temperature measurement of moving or rotating objects. Safe to use and long service life.
Disadvantages of infrared thermometers
1. Susceptible to environmental factors (ambient temperature, dust in the air, etc.)
2. It has a greater impact on temperature measurement readings on bright or polished metal surfaces.
3. It is only limited to measuring the external temperature of the object, and it is inconvenient to measure the temperature inside the object and when there are obstacles.
Precautions for using infrared thermometer
1. The emissivity of the object being measured must be accurately determined;
2. Avoid the influence of high-temperature objects in the surrounding environment;
3. For transparent materials, the ambient temperature should be lower than the temperature of the object being measured;
4. The thermometer should be aligned vertically with the surface of the object being measured. Under any circumstances, the angle should not exceed 30°C.
5. Can be applied to temperature measurement on bright or polished metal surfaces, and cannot be measured through glass;
6. Select the tracking coefficient correctly, and the target diameter must fill the field of view;
7. If the infrared thermometer is suddenly exposed to an ambient temperature difference of 20°C or higher, the measurement data will be inaccurate. The measured temperature value will be taken after the temperature is balanced.
