High temperature sensors
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Posts: 46,084
I've seen a bunch of stuff on sensing temperature with the stamp. Has
anyone found sensors that operate at higher temperatures? I'd like to
build an exhaust gas temperature (EGT) setup for my model
helicopters.
I don't really know what the temperature range might be though I've
done a little looking around and found that gasoline engines operate
up to 1200 degrees F. From my truck driver days I recall that the
diesel pyrometer went up to about 900 degrees F. The model engines
run on methenol and a fair amount of it escapes down the pipe -
probably cooling the exhaust quite a bit.
Anyone with some thoughts on this?
-Eric
PS Sure is great that this resource is here...
anyone found sensors that operate at higher temperatures? I'd like to
build an exhaust gas temperature (EGT) setup for my model
helicopters.
I don't really know what the temperature range might be though I've
done a little looking around and found that gasoline engines operate
up to 1200 degrees F. From my truck driver days I recall that the
diesel pyrometer went up to about 900 degrees F. The model engines
run on methenol and a fair amount of it escapes down the pipe -
probably cooling the exhaust quite a bit.
Anyone with some thoughts on this?
-Eric
PS Sure is great that this resource is here...
Comments
I've done some research on that subject.
look at www.emesys.com, they have excellent pages on interfacing
thermocouples.
My measurements gave me ~500C (~900F) on the exhaust of my .90
twostroke SuperTigre it varies a lot depending on load and mixture.
Look for a sensor type K capable of 1000C, they are very common,
quite cheap and accurate (and very small).
And place your sensor as close to the exhaust port as possible.
Good luck!
/Douglas
--- In basicstamps@y..., "tinkputterfutz" <models@d...> wrote:
> I've seen a bunch of stuff on sensing temperature with the stamp.
Has
> anyone found sensors that operate at higher temperatures? I'd like
to
> build an exhaust gas temperature (EGT) setup for my model
> helicopters.
>
> I don't really know what the temperature range might be though
I've
> done a little looking around and found that gasoline engines
operate
> up to 1200 degrees F. From my truck driver days I recall that the
> diesel pyrometer went up to about 900 degrees F. The model engines
> run on methenol and a fair amount of it escapes down the pipe -
> probably cooling the exhaust quite a bit.
>
> Anyone with some thoughts on this?
>
> -Eric
>
> PS Sure is great that this resource is here...
I looked at the Omega Engineering site - they have an overwhelming
range of sensors available. It's like going to 31 flavors and all I
want is vanilla!
Would you be willing to share what sensor you chose?
-Eric
One is to buy a thermocouple TRANSMITTER. this will ouput a 4-20mADC
value and cost between $50.00 and $100.00 plus the sensor and housing.
https://www.dwyer-inst.com/htdocs/temperature/TemperatureSensors.html
for some good data.
https://www.dwyer-inst.com/htdocs/temperature/651.html
picture
The aluminum cast housing uses a thermowell to allow the thermocouple
to be exposed to the porcess temperature but protected it from the
process.
http://www.aone.com.tw/proof.htm
The 3 items comprise one sensing point. You should find all three
from one manufacturer. MANY MANY suppliers.
The other way is to input the thermocuople wire direct to your ADC.
The problem is that a thermocouple generates a microvoltage signal
from the connection of two dissimilar metals. the types of metals is
the temperatre range selection. the trick is that you MUST have a
direct run from the sensing point to your op-amp. the temperature
will be measured at the sensing point AND your wire connection.
temperature is measued by dissimilar metals and your screw terminals
and the thermocouple wire are disimilar. THEY show temperature
readings too!
Means you need to correct for the wiring connection. There are lots
of sites that show you how to do that.
If you want a cheap device check out home furnace thermocouples.
Home Depot has gas furnace thermocouple for about $5.00
http://www.homedepot.com/prel80/HDUS/EN_US/diy_main/pg_diy.jsp?
CNTTYPE=NAVIGATION&CNTKEY=market%
2fpg_zip_code.jsp&BV_SessionID=@@@@1932421655.1039135431@@@@&BV_Engine
ID=ccckadcgmdlediicgelceffdfgidgkj.0&search_text=thermocouple&DRC=4
yikes ! that is a link and a half. search home depot's site for
thermocouple. The unit I saw was 30 millivolt. may be fun to play
with.
Dave
--
- In basicstamps@y..., "Douglas Rydstroem" <rdo@s...> wrote:
> Eric!
>
> I've done some research on that subject.
>
> look at www.emesys.com, they have excellent pages on interfacing
> thermocouples.
> My measurements gave me ~500C (~900F) on the exhaust of my .90
> twostroke SuperTigre it varies a lot depending on load and mixture.
> Look for a sensor type K capable of 1000C, they are very common,
> quite cheap and accurate (and very small).
> And place your sensor as close to the exhaust port as possible.
>
> Good luck!
>
> /Douglas
>
>
>
> --- In basicstamps@y..., "tinkputterfutz" <models@d...> wrote:
> > I've seen a bunch of stuff on sensing temperature with the stamp.
> Has
> > anyone found sensors that operate at higher temperatures? I'd
like
> to
> > build an exhaust gas temperature (EGT) setup for my model
> > helicopters.
> >
> > I don't really know what the temperature range might be though
> I've
> > done a little looking around and found that gasoline engines
> operate
> > up to 1200 degrees F. From my truck driver days I recall that the
> > diesel pyrometer went up to about 900 degrees F. The model
engines
> > run on methenol and a fair amount of it escapes down the pipe -
> > probably cooling the exhaust quite a bit.
> >
> > Anyone with some thoughts on this?
> >
> > -Eric
> >
> > PS Sure is great that this resource is here...
If you want to play, I have some thermocouple wire, I'm not sure what
type, but it is easy to find out. I could send you a 6" section.
all you need do is twist the wires together to get it to respond.
Electro-weld it to a washer and bolt that on your unit somewhere.
That's what they do on engines.
pay for shipping (34 cents?) and post your test results (not code) on
here. how is that for an exchange ? Heck, just let me know where to
send it, I'm in the holiday mood. Besides it would cost you 34 cents
to send me 34 cents!
contact me off list.
Dave
(South New Jersey)
--- In basicstamps@y..., "tinkputterfutz" <models@d...> wrote:
> I've seen a bunch of stuff on sensing temperature with the stamp.
Has
> anyone found sensors that operate at higher temperatures? I'd like
to
> build an exhaust gas temperature (EGT) setup for my model
> helicopters.
>
> I don't really know what the temperature range might be though I've
> done a little looking around and found that gasoline engines
operate
> up to 1200 degrees F. From my truck driver days I recall that the
> diesel pyrometer went up to about 900 degrees F. The model engines
> run on methenol and a fair amount of it escapes down the pipe -
> probably cooling the exhaust quite a bit.
>
> Anyone with some thoughts on this?
>
> -Eric
>
> PS Sure is great that this resource is here...
sensing range up to 1000C.
http://pdfserv.maxim-ic.com/arpdf/MAX6675.pdf
I am using the max6674 to measure temperature up to 125C. It works
pretty good.
Jason
--- In basicstamps@y..., "tinkputterfutz" <models@d...> wrote:
> I've seen a bunch of stuff on sensing temperature with the stamp.
Has
> anyone found sensors that operate at higher temperatures? I'd like
to
> build an exhaust gas temperature (EGT) setup for my model
> helicopters.
>
> I don't really know what the temperature range might be though I've
> done a little looking around and found that gasoline engines
operate
> up to 1200 degrees F. From my truck driver days I recall that the
> diesel pyrometer went up to about 900 degrees F. The model engines
> run on methenol and a fair amount of it escapes down the pipe -
> probably cooling the exhaust quite a bit.
>
> Anyone with some thoughts on this?
>
> -Eric
>
> PS Sure is great that this resource is here...
experience available. I find the suggestions like the IC listed below very
helpful since I don't have time to go looking for all the new neat latest
things outthere.
Glad to be a part of this. I've learned a lot
Original Message
From: jbirnsch [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=jzRTtbfiI-gaswgDPF1U65ehNb2prJHUO7Lg8u0vFqCuWpfSo3JpdiyB7fS-ew_cFwc99v_-N3MI]jbirnsch@v...[/url
Sent: Thursday, December 05, 2002 11:01 PM
To: basicstamps@yahoogroups.com
Subject: [noparse][[/noparse]basicstamps] Re: High temperature sensors
Maxim sells a thermalcouple to digital converter IC that has a
sensing range up to 1000C.
http://pdfserv.maxim-ic.com/arpdf/MAX6675.pdf
I am using the max6674 to measure temperature up to 125C. It works
pretty good.
Jason
--- In basicstamps@y..., "tinkputterfutz" <models@d...> wrote:
> I've seen a bunch of stuff on sensing temperature with the stamp.
Has
> anyone found sensors that operate at higher temperatures? I'd like
to
> build an exhaust gas temperature (EGT) setup for my model
> helicopters.
>
> I don't really know what the temperature range might be though I've
> done a little looking around and found that gasoline engines
operate
> up to 1200 degrees F. From my truck driver days I recall that the
> diesel pyrometer went up to about 900 degrees F. The model engines
> run on methenol and a fair amount of it escapes down the pipe -
> probably cooling the exhaust quite a bit.
>
> Anyone with some thoughts on this?
>
> -Eric
>
> PS Sure is great that this resource is here...
To UNSUBSCRIBE, just send mail to:
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[noparse][[/noparse]Non-text portions of this message have been removed]
anyone have a good source for these chips? They are available from the web
site with a 7 week lead time...
-Phil
Original Message
From: Sadler Porter [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=A13CN9kTCfILfYdVjw2lU26FuEY7fqTWjD3m2rsMnE1PotrGbRbFlkuWpbVh10mJqwSP3HlPT0aYBZFO4-SEP8txHg]porter.sadler@s...[/url
Sent: Friday, December 06, 2002 9:58 AM
To: basicstamps@yahoogroups.com
Subject: RE: [noparse][[/noparse]basicstamps] Re: High temperature sensors
One of the best things about this group is the wide range of knowledge and
experience available. I find the suggestions like the IC listed below very
helpful since I don't have time to go looking for all the new neat latest
things outthere.
Glad to be a part of this. I've learned a lot
Original Message
From: jbirnsch [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=jA_lEpdcuO5VqEDIrAfW9ZJGzI9HTQkgx-Ba1uwBnp7pOaPl_RIfzGkoQT_9TLSjQ47IDN8J]jbirnsch@v...[/url
Sent: Thursday, December 05, 2002 11:01 PM
To: basicstamps@yahoogroups.com
Subject: [noparse][[/noparse]basicstamps] Re: High temperature sensors
Maxim sells a thermalcouple to digital converter IC that has a
sensing range up to 1000C.
http://pdfserv.maxim-ic.com/arpdf/MAX6675.pdf
I am using the max6674 to measure temperature up to 125C. It works
pretty good.
Jason
--- In basicstamps@y..., "tinkputterfutz" <models@d...> wrote:
> I've seen a bunch of stuff on sensing temperature with the stamp.
Has
> anyone found sensors that operate at higher temperatures? I'd like
to
> build an exhaust gas temperature (EGT) setup for my model
> helicopters.
>
> I don't really know what the temperature range might be though I've
> done a little looking around and found that gasoline engines
operate
> up to 1200 degrees F. From my truck driver days I recall that the
> diesel pyrometer went up to about 900 degrees F. The model engines
> run on methenol and a fair amount of it escapes down the pipe -
> probably cooling the exhaust quite a bit.
>
> Anyone with some thoughts on this?
>
> -Eric
>
> PS Sure is great that this resource is here...
To UNSUBSCRIBE, just send mail to:
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Body of the message will be ignored.
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[noparse][[/noparse]Non-text portions of this message have been removed]
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Dave
--- In basicstamps@yahoogroups.com, "Phillip Kocmoud" <pkocmoud@h...>
wrote:
> I agree, but I have found very few places to buy the Maxim MAX6675.
Do
> anyone have a good source for these chips? They are available from
the web
> site with a 7 week lead time...
>
> -Phil
>
>
Original Message
> From: Sadler Porter [noparse][[/noparse]mailto[noparse]:p[/noparse]orter.sadler@s...]
> Sent: Friday, December 06, 2002 9:58 AM
> To: basicstamps@yahoogroups.com
> Subject: RE: [noparse][[/noparse]basicstamps] Re: High temperature sensors
>
>
> One of the best things about this group is the wide range of
knowledge and
> experience available. I find the suggestions like the IC listed
below very
> helpful since I don't have time to go looking for all the new neat
latest
> things outthere.
>
> Glad to be a part of this. I've learned a lot
>
>
Original Message
> From: jbirnsch [noparse][[/noparse]mailto:jbirnsch@v...]
> Sent: Thursday, December 05, 2002 11:01 PM
> To: basicstamps@yahoogroups.com
> Subject: [noparse][[/noparse]basicstamps] Re: High temperature sensors
>
> Maxim sells a thermalcouple to digital converter IC that has a
> sensing range up to 1000C.
>
> http://pdfserv.maxim-ic.com/arpdf/MAX6675.pdf
>
> I am using the max6674 to measure temperature up to 125C. It works
> pretty good.
>
> Jason
>
>
> --- In basicstamps@y..., "tinkputterfutz" <models@d...> wrote:
> > I've seen a bunch of stuff on sensing temperature with the stamp.
> Has
> > anyone found sensors that operate at higher temperatures? I'd like
> to
> > build an exhaust gas temperature (EGT) setup for my model
> > helicopters.
> >
> > I don't really know what the temperature range might be though
I've
> > done a little looking around and found that gasoline engines
> operate
> > up to 1200 degrees F. From my truck driver days I recall that the
> > diesel pyrometer went up to about 900 degrees F. The model engines
> > run on methenol and a fair amount of it escapes down the pipe -
> > probably cooling the exhaust quite a bit.
> >
> > Anyone with some thoughts on this?
> >
> > -Eric
> >
> > PS Sure is great that this resource is here...
>
>
> To UNSUBSCRIBE, just send mail to:
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Subject and
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>
> Your use of Yahoo! Groups is subject to
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>
>
>
> [noparse][[/noparse]Non-text portions of this message have been removed]
>
>
> To UNSUBSCRIBE, just send mail to:
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