> Colleagues,
>
> We recently had a problem when a contractor ignored the warning signs and
> carried an acetylene tank into one of our open access NMR labs. The magnet
> grabbed the tank and we ended up with a quenched magnet. We are
> contemplating the option to install a metal detector on the lab entrance. I
> heard there are metal detectors installed in clinical MRI lab. I am
> wondering if someone could share some info on the implementation of such
> system and whether there is any interference with high resolution NMR?
>
> Thank you in advance.
>
> Wei
>
It sounds like you should station a lawyer by the door.
--Mike