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Water temp sensor
Posted: Sun Jun 03, 2001 6:12 pm
by Frank O_ The Mountain
While installing the temp sensor bulb in my SA, I noticed that the brass
adapter was loose so I took it out and discovered that it is a "condom", a
closed in device so that the temp sensor itself doesn't contact the water
directly. I've never seen one of these before in all my work on T types.
Have any of you seen this device?
I'm wondering if I should put some medium in it to aid in heat transfer??
Any thoughts? No obscene comments from Badger either~~!!
Terry
Re: Water temp sensor
Posted: Mon Jun 04, 2001 5:33 am
by mrbadger
taterry@aol.com wrote:
> Any thoughts? No obscene comments from Badger either~~!!
> Terry
Well gee wiz Terry. Me? I'm shocked! I wouldn't even consider such a
thing.
But with all this talk about condoms, lubrication, ball races, and such,
I may just have to block the T-ABC website from access by my 11 year old
son.
Gentleman Badger
Re: Water temp sensor
Posted: Mon Jun 04, 2001 5:44 am
by Frank O_ The Mountain
In a message dated 6/4/01 5:34:37 AM Pacific Daylight Time,
mrbadger@home.com
writes:
>
YOU have an an 11 year old son? Well you old dog you!! maybe you meant your
grandson!!
Derek, any news about Jerry?
Cheers
Terry
Re: Water temp sensor
Posted: Mon Jun 04, 2001 5:57 am
by mrbadger
taterry@aol.com wrote:
> YOU have an an 11 year old son? Well you old dog you!! maybe you meant your
> grandson!!
>
> Derek, any news about Jerry?
>
> Cheers
> Terry
>
Nope. He's MY kid - at least as far as I know.
Last time I spoke to Jerry about a week ago, he was doing well, he
sounded just like his old self and felt he was recovering - had just
started his radiation treatments so let's all keep our fingers, toes,
and eyes crossed.
Water temp sensor
Posted: Mon Apr 07, 2003 6:46 am
by Forstner, Peter
Hi,
can anyone please explain me how the Water temp sensor of a TC works? It's
obviously not electrical. How is the temperature measured, the measurement
result transported to the dash board and displayed by the instrument?
I want to install an oil temp sensor/instrument. Is this working the same
way?
Thanks for your explanation
Peter Forstner
mailto:
peter@mg-tc.de
Munich - Germany
Re: Water temp sensor
Posted: Mon Apr 07, 2003 7:16 am
by Dean Jensen
Peter
They both work on pressure. The oil gauge is straight forward, there is
a bellows, and it has a needle on it, as the pressure goes up, the
bellow expands, and the needle rises. The Temperature gauge works the
same way, except it is a closed system, it has an inert gas in it, right
off hand I do not remember what it is, but as the temp in the sensor
goes up, it expands the gas in the pick up sensor, again causing the
bellow to expand, and the needle to move up. You will notice that the
bulb that goes in the radiator is large, and the line to the gauge is
small, with a very small dia hole. You end up with a large amount of
gas in the bulb, in relation to the tube. You never, never want to cut
or break the line for the temp gauge, as one person said on the list, it
is toast after that. You need a pro to work on both. I hope that helps
Dean
-----Original Message-----
From: Forstner, Peter [mailto:
peter@mg-tc.de]
Sent: Monday, April 07, 2003 8:46 AM
To: MG TABC Group (
mg-tabc@yahoogroups.com)
Subject: [mg-tabc] Water temp sensor
Hi,
can anyone please explain me how the Water temp sensor of a TC works?
It's
obviously not electrical. How is the temperature measured, the
measurement
result transported to the dash board and displayed by the instrument?
I want to install an oil temp sensor/instrument. Is this working the
same
way?
Thanks for your explanation
Peter Forstner
mailto:
peter@mg-tc.de
Munich - Germany
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Re: Water temp sensor
Posted: Mon Apr 07, 2003 10:00 am
by Bullwinkle
<<>>
it has an inert gas in it, right off hand I do not remember what it is,
<<>>
Some sources say ether and some have said alcohol.
Blake
Re: Water temp sensor
Posted: Mon Apr 07, 2003 3:14 pm
by Donald Wilkinson
Peter, Dean,& Bullwinkle.
The "bellows" referred to is a bourdon tube, long used in fluid pressure
indicating instruments,is a sort of hemispherically shaped hollow tube,
which attempts to straighten out (pretty linearly) when pressure is applied.
This motion is transmitted via levers and gears to an indicating needle on a
card. The "gas" in the closed system used to indicate temnperatures is
indeed ether, whose vapor pressure changes (linearly) with temperature
changes. It is thus indeed important not to damage the fragile capillary
tube. Should this occur, however, all is not lost. It's perfectly feasible
for a reasonably clever do-it-yerselfer to repair one of these on the
kitchen table with a soldering iron and a bottle of ether, even tho' the
instrument repair cats will try to convince you that it's black magic. BTW,
as we all know, (at least those of us who are politically correct), TC
didn't have one of those neat combo gauges. We're supposed either to get
boiling water in our faces over the folded down screen, or alternative, get
one of those hip Boyce Motometer rad caps.
Don
TC 7993
>From: "Dean Jensen" djensen@accessus.net>
>To: mg-tabc@yahoogroups.com>
>Subject: RE: [mg-tabc] Water temp sensor
>Date: Mon, 7 Apr 2003 09:16:41 -0500
>
>Peter
>They both work on pressure. The oil gauge is straight forward, there is
>a bellows, and it has a needle on it, as the pressure goes up, the
>bellow expands, and the needle rises. The Temperature gauge works the
>same way, except it is a closed system, it has an inert gas in it, right
>off hand I do not remember what it is, but as the temp in the sensor
>goes up, it expands the gas in the pick up sensor, again causing the
>bellow to expand, and the needle to move up. You will notice that the
>bulb that goes in the radiator is large, and the line to the gauge is
>small, with a very small dia hole. You end up with a large amount of
>gas in the bulb, in relation to the tube. You never, never want to cut
>or break the line for the temp gauge, as one person said on the list, it
>is toast after that. You need a pro to work on both. I hope that helps
>Dean
>
>-----Original Message-----
>From: Forstner, Peter [mailto:
peter@mg-tc.de]
>Sent: Monday, April 07, 2003 8:46 AM
>To: MG TABC Group (
mg-tabc@yahoogroups.com)
>Subject: [mg-tabc] Water temp sensor
>
>Hi,
>can anyone please explain me how the Water temp sensor of a TC works?
>It's
>obviously not electrical. How is the temperature measured, the
>measurement
>result transported to the dash board and displayed by the instrument?
>
>I want to install an oil temp sensor/instrument. Is this working the
>same
>way?
>
>Thanks for your explanation
>Peter Forstner
>
>mailto:
peter@mg-tc.de
>
>Munich - Germany
>
>
>
>Your use of Yahoo! Groups is subject to
>
http://docs.yahoo.com/info/terms/
>
>
>
>
>
>
>
>Your use of Yahoo! Groups is subject to
http://docs.yahoo.com/info/terms/
>
>
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Re: Water temp sensor
Posted: Mon Apr 07, 2003 3:26 pm
by Geach, Nigel (Crofton)
I recall it smelled strongly of ether when I cut mine about 20 years ago!
Still trying to figure out how to fix it!
Cheers,
Nigel
TC 0710
-----Original Message-----
From: Bullwinkle [mailto:
yd3@nvc.net]
Sent: Monday, April 07, 2003 10:01 AM
To: Dean Jensen
Cc:
mg-tabc@yahoogroups.com
Subject: Re: [mg-tabc] Water temp sensor
>>
it has an inert gas in it, right off hand I do not remember what it is,
>>
Some sources say ether and some have said alcohol.
Blake
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http://docs.yahoo.com/info/terms/
Water temp sensor
Posted: Tue Apr 08, 2003 10:01 am
by Malcolm Taylor
If you are considering a DIY repair to one of these PLEASE remember that ether is not chemically inert.
It is very highly flammable. It also has a very 'heavy' vapour which can roll along a bench or table and be ignited by a naked flame some distance away. Do not have a flame in the vicinity just in case you have a spillage.
It is also quite a good anaesthetic so don't breathe in too much!
Malcolm Taylor
TA1250, Huddersfield, England.
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