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edcm718
07-10-2009, 07:36 AM
Hello there,

Newbie here. When I found this website I told myself I have to sign-up.

Can anyone recommend a brand of compuond gauge for compressor suction and discharge pressure monitoring using R-507?


Thanks!
lowcool
08-10-2009, 05:26 AM
welcome and enjoy edcm718
to the best of my knowledge they dont make compound gauges for the hi side.cps is a common brand here,back in the good old days robinair where fantastic
Grizzly
08-10-2009, 06:04 AM
Welcome e'718

As lowcool states a compound Gauges is low side only.
Compound relates to the "range" the gauge covers.
In this case either side of Atmospheric Pressure.
IE. Positive and Negative pressure.
Try google
There are lots of good sites to choose from.
Grizzly
Tony
12-10-2009, 09:06 AM
Hi Grizzly and lowcool,


As lowcool states a compound Gauges is low side only.


I'm sorry but I have to disagree, we have 2 high side gauges which are compound gauges. They were bought as spare gauges for CPS manifolds from HRP.

HRP code no 163267
monkey spanners
12-10-2009, 02:22 PM
I have found Refco to be very good gauges.
Grizzly
12-10-2009, 09:17 PM
Hi Grizzly and lowcool,



I'm sorry but I have to disagree, we have 2 high side gauges which are compound gauges. They were bought as spare gauges for CPS manifolds from HRP.

HRP code no 163267

So what scale do these cover Tony?

I am curious that's all!
And always willing to learn!
cheers Grizzly
nike123
12-10-2009, 10:05 PM
So what scale do these cover Tony?

I am curious that's all!
And always willing to learn!
cheers Grizzly

This is definition of compound gauge term:
http://www.engnet.co.uk/tips/glossary.aspx?word=COMPOUND+GAUGE
It make sense that any gauge who shows both negative and positive pressure could be (or even should) also called compound.
It doesn't make sense to deny that high pressure gauge with indication of negative pressure should be called "compound".
(Did I wrote this understandably?)

But, as we see from following picture, it is common to not call high pressure gauge with negative and positive part of scale as "compound", but as "pressure" (which is also correct term, by definition, for both gauges).
http://i35.tinypic.com/3010yoh.jpg
Grizzly
12-10-2009, 10:17 PM
Thanks Nike and thanks Tony!
I am wiser now!
Grizzly
Tony
16-10-2009, 01:05 PM
Morning Grizzly,


So what scale do these cover Tony?


They read from -1 barg to 34 barg.

Admittedly the -1 barg to 0 barg is only about 5 mm but it is there.