Precautions for using non-contact infrared thermometer:
1. It can only measure the surface temperature of the object being measured, not the internal temperature.
2. Temperature measurement cannot be carried out through glass, as the transparency and reflectivity of glass are different from other materials, and the obtained temperature will be affected.
3. Do not use an infrared thermometer to measure bright or polished metal surfaces (aluminum, stainless steel, etc.)
4. Pay attention to the environmental conditions and do not let dust, steam, smoke, etc. cover the lens, otherwise it will interfere with the measurement accuracy.
5. Pay attention to the ambient temperature. If there is a sudden temperature difference of more than 10 degrees Celsius, the product needs at least 20 minutes to adapt to the new ambient temperature.
6. When measuring high temperature (over 1000 ℃) metals or low melting point (liquid) metals, the emissivity (EMS) of the thermometer must be adjusted accordingly to compensate for errors caused by infrared reflection.
Several factors affecting the measurement accuracy of non-contact infrared thermometers:
1. Emissivity: The emissivity of a typical object surface is 0.95, while the emissivity of various other materials can be found in published emissivity tables.
2. Field of view: The ratio of the distance from the infrared thermometer to the object being measured to the size of the measured light spot.
3. Object distance ratio: Ensure that the area of the object being measured is larger than the spot size measured by the infrared thermometer. The smaller the area of the object being measured, the closer it should be to the character.
Working principle of infrared thermometer:
The infrared thermometer consists of an optical system, a photodetector, a signal amplifier, signal processing, display output, and data analysis. The optical system gathers the infrared radiation energy of the target within its field of view, and the infrared energy is collected on the photodetector and converted into corresponding electrical signals, which are then converted into the temperature value of the measured target.
