Help on Lab piece of equipment

[StainedSteel]

Greetings fellow Chemists,

Would you be so kind to help me? I have this piece of equipment of which I have no clue what it is called, neither in my own language nor English.

It could be a custom-made one as well, but still I'm in doubt.

What it does is filtering the exhaust gas of an optical emission spectrometer, consisting of Argon carrying out dirty particles of burnt sample. Inside it, deionized water.

What would you call it? Many thanks, cheers.