Pixel Pitch (or pixel spacing) is measured in microns (µm) and indicates the distance between the center of one pixel and the center of the next in the thermal sensor. In recent years, the market has moved from 25µm to 17µm, and now to the 12µm standard.
Is 12µm or 17µm better?
This is one of the most frequently asked questions. The technical answer is: 12 microns is technologically superior, but it has practical effects you should know about.
Advantages of 12 microns (12µm)
By reducing the pixel size, more pixels fit in the same space, or the sensor can be made smaller while maintaining resolution. This has two key effects:
- Greater detection range: With the same lens (e.g. 35mm), a 12µm sensor offers more base optical magnification and therefore a greater identification distance than a 17µm one.
- More compact equipment: It makes it possible to manufacture lighter, smaller devices with optical performance equivalent to older, larger, and heavier equipment.
When should you choose 17µm?
17µm sensors usually offer a wider Field of View (FOV) with the same lens. If your priority is to see a lot of terrain at short range (e.g. for scanning), a 17µm sensor can be very convenient, although the market trend is to phase it out in favor of 12µm.
Buying summary
- Looking for range and identification at long distance: Choose 12µm.
- Looking for a wide field of view at short distance: Check the device’s specific FOV.