A "magtrometer"?
Yes, I had the same initial reaction - but, to be fair, the lady did say she
represented the manufacturers. As such, you could allow her a bit of leeway in not hearing "magnetron" correctly and possibly confusing it with the term "magnetometer". (I see some readers cringing here...)
Having said that, though, the fact that a representative of the manufacturers does not have a basic technical understanding really has to make you question whether such a person has any technical validity to be in such a role.
So, upon reflection, I think I will add my own
as well.