The ether will boil at that temperature 94,3F/34,6C at atmospheric
pressure, so from that point the vapour pressure will rise and the
manometer will start to move in a closed system. As the
temperature/pressure rises so the boiling point will increase (the
higher the pressure the higher the boiling point), only a small part of
the fluid will turn to vapour, to what is called the vapour pressure at
the given temperature. Thus the higher the temperature the higher this
vapour pressure which is registered by the manometer which in turn is
calibrated to indicate the corresponding temperature.
Kees Oudesluijs
NL
john schreef op 6-7-2014 21:07:
> Ether boils at 94.28 degrees F. At that point it would become a gas. If the
> blub is under filled, the void would be occupied by gas. Would not gas
> compress differently than liquid thus causing the gauge to read incorrectly
> (low) if the ether vaporized inside of the blub and line?
>
> John Spaur
>
> -----Original Message-----
> From: Healeys [mailto:healeys-bounces@autox.team.net] On Behalf Of Oudesluys
> Sent: Sunday, July 6, 2014 1:10 AM
> To: healeys@autox.team.net
> Subject: Re: [Healeys] Safety gauge - resolved
>
> The amount of ether in the bulb is not very critical. Any fluid has a
> specified vapour pressure at a specified temperature. This is what the gauge
> registers, it is a manometer that translates pressure to temperature on the
> scale.
> As vapour pressure is independent from volume the amount of fluid does not
> matter, as long as the bulb and capillary is not completely filled up with
> fluid or if there is no fluid but just vapour.
> Apparently there are several sorts of ether I was told by a chemist. He
> supplied me with some that is normally used in automotive gauges which I
> used for repairing a gauge.
> Kees Oudesluijs
>
>
>
> -----
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