1. Thermal sensitivity/NETD

The ability of a thermal imager to distinguish small temperature differences affects the fineness of the image to a certain extent. The higher the sensitivity, the better the imaging effect and the better the ability to distinguish the specific location of the fault point.

2. Infrared resolution

Infrared resolution refers to the detector pixels of the thermal imager. Similar to visible light, the higher the pixel, the clearer and more delicate the picture, and the higher the pixel, the more temperature data can be obtained at the same time.

3. Field of View/FOV

The horizontal and vertical angles of the image on the detector. The larger the angle, the wider you can see, such as a wide-angle lens. The smaller the angle, the smaller you see, such as a telephoto lens. Therefore, it is also very important to choose the right lens according to different occasions.

4. Spatial resolution/IFOV

IFOV refers to the angle that can be imaged on a single pixel. Because the angle is too small, it is expressed in milliradians mrad. The IFOV is affected by the detector and the lens. It can be found that the lens is unchanged, the higher the pixel, the smaller the IFOV. On the contrary, the pixels remain unchanged, and the smaller the field of view, the smaller the IFOV. At the same time, the smaller the IFOV, the clearer the imaging effect.

5. Temperature measurement range

The range from the lowest temperature to the highest temperature that the device can measure. The range can have multiple temperature ranges and needs to be set manually. For example, the temperature measurement range of FOTRIC 226 is -20℃~650℃, and the temperature range is divided into -20℃~150℃, 0℃~350℃ and 200℃~650℃. Select a small range that meets the requirements as much as possible for testing. If you test the target of 60°C, selecting the range of -20~150°C will make the thermal image clearer than selecting the range of 0~350°C.

6. Full radiometric video streaming

Save the video stream of the temperature data of each pixel in each frame, the full radiation video can be used for post-temperature change analysis, and can also perform arbitrary temperature analysis on each frame of pictures.