Nothing is entirely impossible, but based on my electrical engineering background I’d say it is extremely unlikely that a millimeter-wave body scanner (very low power non-ionizing radio waves) could do any damage to a pump, or a CGM, or a pacemaker, or anything else for that matter. Manufacturers have simply not done enough (or any?) testing and therefore their lawyers tell us that we should not take these devices through body scanners. Well, I routinely go through body scanners with my pump and my CGM, because I find that more convenient and I am convinced the risks are extremely low (much lower than e.g. my pump falling down and breaking mechanically during pat-down screening 
) On the other hand, belt X-ray machines employ higher energy (ionizing) radiation. The odds of this causing a pump failure are not very high, but are still much higher than in the case of body scanners, which is why I’d never put my pump through an X-ray machine - there is no need to do that anyway.
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