Bill Pearce wrote:
> Canned air, which isn't really air at all, comes out at what seems to be a
> much higher pressure than CO2, which is relatively low pressure. Maybe
> that's why it doesn't blow out some sort of freezing liquid?
>
There are several things going on here:
Compressed air systems such as used in shops have light oil in them to
lube the compressor and system connections.
CO2 cartridges for BB/pellet/paintball guns have lubricant in them for
the gun mechanisms.
DustOff and other so called "canned air" products for dusting are
compressed so that, when new, most of the contents are liquid. If they
are tipped during use, some of the liquid will be sprayed out and may
damage surfaces/finishes, etc. before vaporizing. I personally believe
they should be quite safe for things like sensors once partially used
and if held upright. Nonetheless, I'm not recommending it.
So none of these sources of compressed gas are suitable for sensors.
The CO2 duster from American Recorder is specifically designed not to have any
contaminants. You do have to use only their cartridges and it isn't legal to go
on a plane in hand or checked luggage. Silly, but there it is.
Moose
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