1. The detector resolution of the thermographic camera
The detector resolution of infrared thermal imaging cameras is now the mainstream of 160*120 (192,000 pixels), and the mainstream is basically this pixel. There are also lower resolutions such as 60*60, 36,000 pixels, 80*60, 48,000 pixels, 100*100, 100,000 pixels. There are also 384X288, 1.1 million pixels and 640480 (3 million pixels). For handheld infrared cameras, 160*120 is the most golden resolution and has a very good price/performance ratio.
2. The focal length of the thermographic camera
The lenses of general infrared cameras can be replaced. A telephoto lens will improve the recognition rate at long distances, but will greatly reduce the field of view. On the contrary, the short-focus lens greatly improves the field of view, but it will reduce the recognition rate.
3. Infrared thermographic camera frame rate
Frame rate is the second most important indicator in the purchase of infrared thermal imaging cameras. The frame rate refers to the number of images that the thermal imaging camera can complete in 1 second to capture, process, and perform. The faster the sensor response and the higher the internal circuit processing rate, the higher the achievable frame rate. Infrared thermal imaging cameras with high frame rates are suitable for capturing the temperature movement of high-speed objects and objects with high-speed temperature changes. The general TV frame rate is 25Hz. According to the frame rate of infrared thermal imager, it can be divided into two categories: fast scan and slow scan. Equipment used in power system, medical treatment, construction and other fields generally adopts fast scanning infrared thermographic camera, otherwise it will bring some work inconvenience. Generally speaking, the frame rate of the infrared thermographic camera should reach 30HZ, preferably 50HZ, otherwise, the infrared thermographic camera will not be able to work in many working situations. The level of the frame rate directly indicates the performance and response speed of the thermal imaging camera, and also directly affects the thermal imaging camera.
4. Temperature measurement range of infrared thermographic camera
This is the third most important indicator of thermal imaging cameras. Each model of thermal imaging camera has its own specific temperature range. Therefore, the user's measured temperature range must be considered accurate, neither too narrow nor too wide. According to the law of blackbody radiation, the change in radiant energy due to temperature will exceed the change in radiant energy caused by emissivity error in the short wavelength band of the spectrum. Therefore, users only need to buy an infrared thermographic camera that is within the temperature they measure. When choosing an infrared thermographic camera, it is best to choose an infrared thermographic camera with an optional temperature measurement area. This should not only be able to adapt to various temperature environments, but also ensure accurate temperature measurement.
5. Whether the infrared thermographic camera has the function of moving temperature measurement
This is the fourth very important indicator of thermal imaging cameras. Many infrared thermographic cameras do not have this function, and only have the function of measuring the temperature at the center point. This type of thermal imaging camera cannot automatically track the highest temperature point, and if the lens is not aimed at the highest temperature point, it will not be able to correctly capture the problem point. Therefore, it is very important to have movable temperature measurement points and temperature measurement areas.
6. The choice of infrared thermographic camera brand
As the most advanced high-tech product, the thermal imaging camera has the same indicators, and the actual use effect of different brands is very different.