It is not easy to find out except to ask UNI-T what the physical resolution of the microbolometer is. Manufacturers sometime obscure that information deliberately. 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. EDIT: The more I look at the options, the more this one looks like a no-brainer. What am I missing? Would a Seek or HTi phone module be a better option? UTi-260B would appear to have been replaced by the UTi-260K so the discontinued model may be available at a good price, as noted by the OP.

UNI-T Thermal Imager UTI260A 256x192 Pixels Thermographic

If a camera is received and it is displaying dead pixels on its display..... it has suffered pixel failures since original calibration and should be sent for a new NUC and dead pixel map creation. Dead pixels are not truly a “Fault” in terms of a camera containing them..... they are a fact of life that the image processing system is designed to cope with. PROS: High thermal resolution, 25Hz refresh rate, wide temperature range, long battery life, IP65 waterproof. All the thermal images that you capture will be stored on the 16GB microSD card which is provided with the camera. That is more than enough and you basically won’t have to delete any photos throughout the camera’s lifetime. Memory Card, Real-time USB Transmission]-- Comes with a 32GB memory for image storage. Or you can transmit real-time data to PC software via Type-C USB interface. Image Format: BMP.Then there is the temperature range and things look fantastic here since the sensor can measure any temperature between -5 F to 1022 F (-15 C to 550 C), a range which is about 30% wider than what you would expect from other thermal cameras in this price range. Its thermal accuracy is on par with what’s expected out of thermal sensors these days, +/- 2 C. The UNI-T UTi260B is a thermal camera which offers great value for money with a high thermal resolution, 25 FPS refresh rate, wide temperature range and IP65 rating. I don't think you could set the temp range manually either? That would be a no go for me too. But everyone has different needs!

UNI-T UTi260A Infrared Thermal Imager UTI260A 256x192 PCB

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. The camera also has quite a wide viewing angle of 56 x 42 degrees, this is also known as field of view.Now let’s look at the camera’s temperature measurement performance. First of all, it has to be the sensitivity since that is instrumental to defining image quality. This camera has a 50 mK NETD which means it’s not bad at all. It means it can spot a temperature difference of down to 50 mK. The lower the number here the more detailed the image will look because the camera is sensitive to even the slightest differences in temperature. Note: Size and color may be slightly different due to manual measurement and different light conditions. Thank you for understanding. 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. Version K is aimed towards measuing fever in people (Limited range around 30ºC but increased accuracy ±0.5ºC).

Uni-t Uti260A Infrared Thermal Imager Camera 256*192 Heat

Obviously, having digital camera and larger measuring range are the pros of UTI260B. But I chose the 260A for saving money because I always prefer the thermal mode rather than the fusion mode, and maybe simpler could be better. 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).I have not found any useful information to suggest interpolation is used on the cameras microbolometer but upscaling will be needed to fit the 320 x 240 pixel LCD display. 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). It is difficult for a user to establish how many non functioning pixels are present on a thermal sensor FPA for the reason that you detail. All FPA’s will contain pixels that are either faulty or produce an output that falls outside of the acceptable specification. The image data from the ROIC is normally RAW and subsequent image processing stages create the Non Uniformity Correction and Flat Field Correction tables that both capture ‘out of specification’ pixels and try to correct other pixel outputs to achieve a good Flat Field output. The dead pixel map is created by the NUC ‘calibration’ process carried out at the factory. Any pixel that produces an unacceptable pixel output value is marked as ‘Dead’. 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. The thermal imager camera is also equipped with a 5000 mAh Li-Ion battery which will ensure up to 6 hours of continuous operation.