Yes. Just come up with a non-medical/safety use for it and you are good. Check your car's engine to see if it will last through the next race - a very useful thing to do and nobody will think twice. Check a boiler to be sure it won't explode - you better get this right or people will die so don't talk about potential uses here.

Yes, more and more (since I started reusing old devices), I wished I could inspect things non invasively. To find locking or friction points.

I guess nothing prevents you from doing so :)