Thermal Imaging Manfred Kihn
Recently, I was reflecting on the first time I ever used a thermal imager (TI). The display screen flickering like old black and white televisions, I thought to myself, “What does this do?”
I moved around the room. I could see things with my naked eye and through the screen at the same time, all in black and white. I then entered a darkened room, uncomfortable and unsure of what to make of the images and no longer relying on my own sight. The screen showed objects in black, gray, and whites in a variety of contrasts. I knew then that this was an impressive device, one that I would spend years learning and appreciating.
We are further ahead in technology today, and yet your TI is still in black and white, even if it is compliant with National Fire Protection Association (NFPA) 1801, Standard on Thermal Imagers for the Fire Service. To clarify, grayscale imagery with white-hot polarity images that show up as dark or black will be cooler/cold, images that are brighter or white will be warmer/hot, and everything in between will be in shades of gray. With training and practice, the hues of black, gray, and white will make sense.
What did you do when you picked up your very first TI? Did you think you needed training, practice, and an understanding of what those images were and what they meant?
If your department follows the NFPA, it should understand about NFPA 1408, Standard for Training Fire Service Personnel in the Operation, Care, Use, and Maintenance of Thermal Imagers. Section 7.1.6 says, “All participants shall understand image interpretation and misinterpretation.” It also goes on another eight subsections.
1 A heat anomaly on the floor—a furnace heat duct. (Photos courtesy of Bullard.)
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