Hello List.
A couple of Mumble Sessions before we talked about our Glove Box design once again..
Well, one action item was to figure out, how we can verify the clean room quality inside the Glove Box. And I remembered some nice handy-size Analyzer I saw already for this purpose (to check 'dirtyness' behind machines in the productive clean room behind machines or to check air flow in and outs).
Fortunately, due to German Engineering Art in cheating with diesel engines (Volkswagen, Audi etc..) "fine dust" is a big topic nowadays. Okay, is was joke..
But, instruments to measure the fine dust in our daily environment, in cities along heavy used streets or so, are already available in bigger super markets like Kaufland here in Germany now. And this instruments offers 2 fine dust classes - one with 10 Micron and another with 2.5 Micron particle size. Of course, this is still a dimension away from particle sizes which matters for real clean room classes - regardless of which clean room class system (ISO 14644-1 or US Federal Standard 209 E) we are looking at.
Anyway, IMHO this instruments are a great and quite reasonable priced step into particle measurements at all :-)
The mentioned super market has currently an offer round about 200 Euros; on ebay.com similar instruments are available from 150 Euros upwards.
Maybe we can even "update" the firmware on such a instrument for smaller particle sizes :-o
Regards, Hagen.