This is a picture of "Industrial Strength" hardware consisting of , at the far right, a highly sensitive Low Light Level Camera, the smaller box to the left is a housing for the optics and the high sensitivity crystal fluorescent screen that the camera observes. The sample is a section of 1" (minimum) wall steel pipe and the weld. The vertical tube on the left houses the X-ray source, the hoses are for cooling fluid.

I did not put up the picture produced by the system because it has been my experience that those new to reading the calibration standard have difficulty seeing a 2% much less a 1% penetrameter (the standards).

I have witnessed an expert watch a piece of 70mm film spooling along at a fast rate suddenly stop the motion and say "There it is!". My response, without thinking what my naivete would sound like was "What's there?" To my embarrasement he pointed to a barely visible grey rectangle with some quite visible numbers that defines the penetrameter. I certainly can see the numbers but the important part, the small holes in this thin piece of metal that he can "clearly" see are beyond me. You still aren't convinced? Look for yourself but don't blame me for the size of the file! Click here! That is,-- when I find the negative in my (filing?) system.

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