ReplyNew to me.
Professional Member
Anyone seen or use this for measuring vacuum?
Aircraft Mechanical Accessories Technician. The Air Force changed the job title to Air Craft Environmental Systems Technician. But I've decided I'll always be a Mech Acc.
Professional Member
New to me.
If you help others then you are a Success
Professional Member
Yes, they work well. More accurate/dependable than any digital/electronic vacuum indicater you can buy. JMHO
To much work with too little time!!!!
Professional Member
Here Looks Interesting enough. I would like to see one in action. How exactly does it work.
"It's always controls"
Professional Member*
I say it still looks like a bong.
Karst means cave. So, I search for caves.
Professional Member
OH........HMMMM the more messed up you get the better the vac you pulled.
Professional Member
Its a wet bulb vacuum indicator. There is a thermometer in it that is wetted with vacinol. The lower the vacuum, the lower the bioling/evaporation point. 38F is around 6000 microns. There is a chart that relates the temp vs vacuum.
To much work with too little time!!!!
Professional Member
Good Exp Thanks
Professional Member*
anyone know the price on this item ? looks interesting .
could possibly retire my mercury absolute monometer.
Professional Member
Never seen 'em at the supply house...............Originally Posted by absrbrtek
Who has them? Abco maybe?
Or online/special order only?
Would like to take a closer look.
Professional Member
Got to email the guy to get delivery and price info. None of the supply houses sell this. Its been around forever, long before electronic ones. All the York books show it in their evacuation procedures.
To much work with too little time!!!!
Professional Member
I've had 3 over the years, although mine were made by Humphreys. Good gauges, work with distilled water or vacanol. 35* with distilled water is 5000 microns, -12* on vacanol is 5000 microns. Best to use vacanol or you can't go deep (obviously).
Professional Member*
Please read my post on vacuum readings thread. I've seen this device in action on a large system, estimated cost is about $150.00, not bad when when you consider the cost of an accurate electronic meter.-GEO
Professional Member*
hmmm, so how does it keep from getting the water or vacanol into the system?
$150 doesn't seem like a good deal when you can get a very accurate YJ, that reads from atmosphere down to 1 micron, for under $250....
Professional Member
With me, the issue is that a mercury manometer or a wet bulb indicator with no leaks in the connecting tubing can't lie to you. Something with batteries in it can, and sometimes will. The distilled water vapor and the vacanol vapor do get in the system, but in such a minute quantity that the overall vacuum doesn't rise. The amounts can't even be considered, they're so small.
Professional Member*
I really don't have that option as I have several Miriam abs manometers, but I can't use them in the chemical plants I service. Kind of ironic when you think about it. I used to use them a lot doing absorbers. Building owners and chief engineer still like to see them after a teardown for the world famous standing vacuum check....Oh I wanna mark the scale, no I wanna, no I wanna ooops! Whadda we do now genius? I know, lets tell that goofy A/C tech that he left it there and it dropped, that way he and his company will have to pay for the clean-up and EPA fines. Yeah, thats the ticket.....GEO
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! -George Carlin