Five key configuration parameters when purchasing infrared thermal imaging

1. Thermal imaging pixel size: refers to the size of a single pixel (pixel) on the thermal imaging detector

At present, common thermal imaging pixel sizes include 12μm, 17μm, 25μm, 35μm and other specifications. Among them, 17μm and 12μm are the more common specifications.

2. Detector resolution: that is, the number of thermal imaging pixels. The higher the resolution, the clearer the image quality.

Notice! The pixels of the detector and the pixels of the eyepiece are different. Be sure to check the product parameters clearly. The relatively high-end detector resolution among civilian infrared thermal imaging cameras is 640×512, and the common ones are 256x192, 384x288, and 640x512.

For example, a 640x512 pixel infrared sensor can display 640 pixels of detail in the image horizontally, and 512 pixels of detail in the vertical direction. Currently, there are 1280×1024 infrared thermal imaging cameras on the market, which are used for thermal imaging of ceilings.

3. NETD refers to the smallest temperature difference that can be detected by infrared thermal imaging

The smaller the NETD, the more sensitive it is and can more accurately display the heat distribution on the surface of the object. Even objects with very little heat can be detected and displayed on the screen.

4. Frame rate refers to the number of images displayed per second. The higher the value, the more images can be displayed per second.

Common infrared thermal imaging frame rates are usually between 9-60Hz, such as 25Hz and 50Hz. For example, 25Hz means displaying 25 pictures per second, and 50Hz means displaying 50 pictures per second.

Viewed with the human eye, it is recommended to use a high frame rate when driving. There is not much difference in the effects of 50Hz and 60Hz observed with the naked eye.

5. The focal length of the lens is an important factor affecting the presentation of infrared images. It has a certain proportional relationship with the field of view angle and detection distance.

The larger the focal length data of the lens, that is, the longer the focal length, the narrower the field of view, the smaller the range that the lens can capture, and the greater the proportion of the target in the field of view.

The larger the field of view, that is, the wider the field of view, the wider the range that the lens can capture, and the smaller the proportion of the target in the field of view.

The farther the detection distance is, the narrower the field of view, the smaller the range that the lens can capture, and the greater the proportion of the target in the field of view.

In addition, the battery life, laser indication, protection level, application scenarios, after-sales guarantee, etc. of the infrared thermal imaging camera must also be considered. In short, when we choose a thermal imager, we need to make comprehensive considerations based on actual needs, and it is best to make decisions by referring to some professional reviews or purchase reviews.

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