Posted 20 hours ago

Karlak UTi260A Professional 256 x 192 IR Thermal Imaging Camera Rechargeable Handheld Temperature Car Tracking Infrared Thermal Imaging Camera with 2.8 Inch LCD Screen, Real-time Image Transmission, 7

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Avoiding judgement errors, reducing labor cost, and discovering poor heat dissipation and hidden trouble points. I have no doubt though that for more money there are better cameras but at this price point I have probably nothing to complain about.

UNI-T UTi260B vs UTi690B - Page 1 - EEVblog

I can't say much about accuracy as I don't have anything similar to compare but it agrees with my other measurement methods (temperature probe of DMM included as well). Whenever low-cost manufacturers introduce a high-end thermal camera in their portfolio, I’m always intrigued. This is the moment where they bring the fight to the big manufacturers and try to bring more to the table in terms of numbers. There’s an unwritten rule: The flagship of one company will be a better offering when compared to the mid-range of another. Why? Because the other company has their own flagship as well which costs even more and thus the mid-range can’t go that far in terms of specs because it will make the flagship redundant. It’s marketing 101.


Looking around at other thermal cameras that use the iRay Tiny1 imaging engine, you have got a camera at a very good price

UTi260B - UNI-T Thermal Imaging |Thermal Cameras,Thermal

Personally, the device would drive me insane. But for the price it's hard to beat. You get what you pay for. This becomes quite clear again here. The biggest problem with handheld thermal cameras is the built-in processors, and so is the cost. This then leads to such effects as a delay in the display when panning (despite 25Hz). Or how long the device boots. Mobile phone models are better because the smartphone can do all the work, including an additional strong image improvement. Or you have to spend more money. Most manufacturers of microbolometers clearly state the percentage of functional pixels expected to exist on a production FPA. This is generally 99.6% or 99.8% as I have already stated. Many microbolometers provide far more functional pixels as tests on the E4 and it’s dead pixel map image showed. The service mode on many cameras tells you how many pixels are marked as bad. The service modes can sometimes provide the option to carry out a fresh NUC process and create a new dead pixel map to correct pixels that have drifted badly or failed in use. Thankfully most FPA’s work their whole life with the original NUC table and dead pixel map created at the time of production. It drains battery quite fast (or I've played a lot with it without noticing) but it seems to be charging when it's used while connected to USB as well (or at least battery indicator is stepping).Now that China is producing its own microbolometers, we may see a change in the production acceptance criteria for cheaper cameras, but that is not something I know about. The image quality is really very good, the resolution of 256x192 gives a much better image than the Flir one gen2 (160x120) that I also have. Regarding the quality of microbolometers used...... whilst it is true that science grade microbolometers are of the highest quality with the minimum of dead pixels, most general use microbolometers are still of very good quality with 99.6% or 99.8% pixels within specification. Many microbolometers are far better than that specification. I am not sure that microbolometer makers actually release FPA’s with high dead pixel counts. The acceptance testing criteria for a thermal imaging FPA is pretty specific and tight. This is good news for buyers of the technology. One place where the camera could do with some improvement is the visual camera supporting the thermal sensor which has a 640 x 480 pixel resolution. Most infrared thermal imaging cameras will have at least a 2 MP visual camera.

Thermal camera - UTI260A or UTI260B - Page 1 - EEVblog

It is not that easy to discover the dead pixel count without entering the cameras engineering modes or accessing the dead pixel map. A dead pixel map often exists as an image file containing all the pixels present on the FPA but highlighting those that are market based. The image processing stages read the dead pixel locations out of the image file. Gaining access to the dead pixel map is not a simple task on many cameras unless access can be gained to the operating system and configuration files. The 260K seems to be targeted to fever scanning as Unix5566 mentioned, so I am hoping the price premium is mostly due to the increased sensitivity and the current demand. It may be possible to detect pixels that are bing disguised by image processing by sweeping a thin IR source wire across the FOV and analysing the image output for deformations in the imaged line. Not something I have ever done and a purely theoretical process. There is normally no need to analyse the dead pixel content of an FPA unless an issue arises in the cameras correction process or damage is suspected, such as laser induced pixel distortion etc. Third, the start time of over 20 seconds. And when changing between high and low gain (>150°C) you can wait another 20 seconds... I have seen a description of the camera that states “80x60 to 256x192” for the IR resolution. That read as interpolation or an electronic zoom function. Such is an unusual way to describe the resolution unless it meant there were several different models with differing resolution.Version K is aimed towards measuing fever in people (Limited range around 30ºC but increased accuracy ±0.5ºC). The thermal imager camera is also equipped with a 5000 mAh Li-Ion battery which will ensure up to 6 hours of continuous operation. It probably won't see much scientific usage so should there be any pixel errors it's not my concern (the display has none, and sensor pixel fault is hard to detect as probably similar interpolating algorithms are used as with photography cameras so I don't know if it has one). I can't find the differences between the two, only the maximum temperature which is 400°C and 500°C

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