For accurate non-contact IR temperature measurement, observe the following:
1. Distance ratio to target (light spot)
2. Field of view
3. Environmental conditions
4. Environmental temperature
5. Emissivity
The optical system of an infrared thermometer collects energy from circular measurement points at a distance greater than the target (light spot) and converges it onto the detector. The optical resolution is determined by the ratio of the distance from the device to the object to the size of the measured light point (D: S ratio). The larger the ratio, the better the resolution of the device, which can measure smaller light spots from farther distances. The latest innovation in infrared optics is the addition of near focus characteristics, providing accurate measurements of small target areas without unwanted background temperatures.
The field of view ensures that the target is larger than the size of the light spot being measured by the device. The smaller the goal, the closer you should be. When accuracy is particularly important, ensure that the target is at least twice the size of the light spot.
Pay attention to the environmental conditions of the work area. Steam, dust, smoke, etc. can obstruct the lens of the equipment, thereby hindering accurate measurements. Before installation, other conditions such as noise, electromagnetic fields, or vibrations should also be considered. Protective casing, air purification, and air or water cooling can protect the sensor to ensure accurate measurement.
If the thermometer is exposed to a sudden environment with a temperature difference greater than 20 ℃, please maintain it for at least 20 minutes to adapt to the new ambient temperature. Fixed sensors have been optimized for performance in special environmental temperature ranges.
Emissivity is a measure of an object's ability to radiate infrared energy. The energy of radiation indicates the temperature of an object. The range of emissivity values is from 0 (smooth mirror surface) to 1.0 (black body). Understand the emissivity and emissivity values of various materials.
