As we move the gauge around, we can confirm that none of the indications exceed our two-millimeter limit.
Now, let’s compare this to a standard 2D Circle Gauge. To start, we must manually establish a relative base measurement—in this case, the 10 milimeter pipe diameter.
Once we overlay our 2 milimeter circle, the limitations become clear. This technique cannot correct for distortion at the corners of the picture, and it fails to follow the actual contour of the pipe.