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. 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 Professional 256 x 192 IR Thermal Imager

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). 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’. 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. 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.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. Reliable Quality, IP65 Rating]-- Made of high quality material and is ergonomically designed, with wear resistant and durable shell, anti-slip handle, comfortable operating buttons and tripod mounting hole in the bottom. And with IP65 protection grade and 2m drop resistant, it's more convenient to use for various applications. 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. 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. 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).

UNI-T UTi85A Thermal Camera, 80 x 60 Resolution, -10°C400°C

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. 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. 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. The thermal imager camera is also equipped with a 5000 mAh Li-Ion battery which will ensure up to 6 hours of continuous operation.What might be surprising was that a 320x240 (76k pixels) gives a perfectly acceptable image with over 1000 dead as long as they are scattered. A fever screening camera may not be that useful for general use if it does not have wider measurement capability as well. Some cameras have general and medical modes to meet the needs of a more varied customer base. 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. Secondly, there was a teardown from Fraser where you can see the greatly reduced quality of the inner workings.

UNI-T UTi384H Thermal Imager 384x288 Imaging Module

This does indeed work, with any good edge. How easily does depend on the replacement system being used. A Raytheon BST does a simple 'copy next' so produces horizontal lines, some tend to copy down/right, some will do an average of the good neighbours. Once the Dead Pixel map has been produced the image processing stages of the camera do their best to disguise those pixels from the users view. This is relatively easy in most cases as the values of surrounding pixels may be used to create an average value to replace that of the dead pixel position in the array. Life becomes a little more challenging when a cluster of dead pixels or a dead column is detected. A cluster can cause a dead spot in the image displayed that cannot be concealed by the image processing and a dead column can be a challenge to hide from the human brain that sees pixel correlation and recreates the defective line in some cases. For these reasons a thermal FPA sensor specification normally states that the FPA shall not contain more than a certain number of pixels in a cluster and adjacent to each other. Dead Columns may also be a reason to reject an FPA. The boot time is around 20s (mostly there is a progress bar) and the switching between the low and high gain takes also around 20-25s (there is no progress bar here). High gain is -15-150C, low gain 150-550C. 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. 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?

PROS: High thermal resolution, 25Hz refresh rate, wide temperature range, long battery life, IP65 waterproof. 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. Third, the start time of over 20 seconds. And when changing between high and low gain (>150°C) you can wait another 20 seconds... 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.