On 26/06/13 15:29, thescullster wrote:
Hi all

I have come by an old barometer - something like the item shown here
http://www.hemswell-antiques.com/ant...ter-33028.html
(although not quite of the quality).
Now I know that these devices measure atmospheric pressure, but I am
not clear on how much this will be affected by the instrument location.

Unless in a hermetically sealed room, not at all.


Does a heat source like a radiator change atmospheric pressure?

Nope,
But it can affect instruments in any case. But normally yoi calibarte
once its oin its final location.

Can I mount this on a wall above a radiator and expect it to work?

yup

From my memory of the barometer, the needle doesn't appear to move
much in operation. Is this because it was previously in a centrally
heated house, or is there likely to be something wrong here?

no its because the air pressure only moves slowly over days.

Thanks

Phil


--
Ineptocracy

(in-ep-toc-ra-cy) €“ a system of government where the least capable to lead are elected by the least capable of producing, and where the members of society least likely to sustain themselves or succeed, are rewarded with goods and services paid for by the confiscated wealth of a diminishing number of producers.