No, mine is not a lamp nor an isotope source, nor a geiger tube ..... yes, it's a sensor, but you need to guess what type of sensor, or the name (or how it work, if you prefer) ..... and no, not a phosphor disc, inside, also if UV are involved in it
A help ? ..... it "see" something
@millirad: some sort of vacuum pump for "dust-clean" machines ? (i think are called "white chambers" in English, those zones or machines where there is no dust for work with chips)
Demonex is the winner! Ding! Ding! It's a turbomolecular high vacuum pump. You were right HIMNL9, when you said vacuum pump. It's use is to go from ~100 millitorr pressure and reach extremely high vacuum states. These are used sometimes with reactors/chambers that process wafers.