Actually, I did search on the RF Gen, has a (vacume I assume) waveguide, and numerous safety warnings.
My experience (Systron Donner) was with self contained Helium Leak detection where a Quality Control Tech would spray helium from a wand, up and down some piping / housings.
The mass spec. unit was portable in that it was huge but could be (barely) wheeled thru a doorway.
So, it was specialized for helium, with a (needle moving coil) type meter, front and center. You spray, and cross your fingers...no wooooo tone or meter movement meant your welds we're good.
The devices were gas pressured fire / overheat detectors.
Hey...where's your vacume stuff: pumps gauges, lines and all kinda valves ?
Maybe package as 'portion of a system', plus an older PC Tower, and a...old CRT monitor...oh wait, that's just some junk, behind the Mass Spectrometer System...