| Products > Thermal Imaging |
| Specification of a thermal camera for PCB repairs - some thoughts |
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| Fraser:
Some example PCBA thermal analysis cameras from a quick Google search. NOTE, I am not saying that all of these are from DYT, but most are and Qianli use DYT camera systems with their own analysis software solution. The older products can use 160x120 pixel cores or SEEK Thermal cores and these are best avoided. The specifications will show which core is in use. Look for 256x192 pixels or sometimes shown as 260x200 ! (Marketing team getting carried away!) Fraser |
| elianto:
Real PCB from HIKMICRO Mini2Plus V2, WITH ADDITIONAL LENS ZnSe for laser focus Diam.20mm FL:50.8mm 256 × 192, manual focus, FOV 25° × 18.8° , focal lenght 6.9 mm, SuperIR active |
| fuho:
UNI-T UTi120S Description from TEMU: High precision thermal imaging: Get accurate temperature readings with the UNI-T UTi120S Infrared Thermal Imager. Versatile testing: Perfect for PCB circuit testing, industrial testing, floor heating tube testing, and more. Wide temperature range: Measures temperatures from -20°C to 400°C (-4°F to 752°F). Claimed Specs: * 60mK Therman Sensitivity * 25Hz Frame rate * 120x90 IR resolution * 17um pixel * 2.4" 240x320 color TFT * LED light, laser pointer * USB-C, uSD ()comes with 32GB) I had some credits lying there so I paid under $80 USD. Would I buy it at it's full price of $175? No |
| Fraser:
Fuho, If you add a cheap $15 ZnSe close-up lens to your camera, it will transform its PCB inspection abilities. I recommend that you buy a ~20mm diameter ZnSe laser focus lens with a focus distance of 50mm for your 120x90 pixel camera. This will make the best use of your pixels over a relatively small area of the PCB. For greater field of view, you could use a 100mm focus distance lens but some component detail will be lost. You can make a holder for the lens out of anything really, even cardboard ! Some users even tape the lens to the front of the camera when needing it for PCB work. Fraser |
| fuho:
Thanks, for the advice! Found a cheapo one on AliExpress and let's see how it works in couple weeks. |
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