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PICList Thread
'Heating strips'
1997\08\08@021710 by Josef Hanzal

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I am just about to design a termostat controller for a chemistry laboratory
and need to find a supplier of "selfsticking heating mats" or "heating
strips". For the prototype I have bought one at unreasonable price $100. It
is some kind of metal foil etched in labyrint pattern and covered with some
heat resistant plastics. It seems to be produced by 3M, I just doubt the
factory will supply 5 pc this year and 5 pc the next. It does not have to be
3M production, any other will do. Just need a low voltage type (safety rules
do not allow above 24V AC), about 75 - 100 W.

Can you recommend any source ? Europe is preferred but I believe UPS can
deliver from everywhere. Thanks.

BTW, some Dallas digital thermometer chip was mentioned on the list lately.
What is its resolution ? I would possibly consider using this one.

Josef

1997\08\08@032959 by Ken Parkyn

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Josef Hanzal wrote:
>
> I am just about to design a termostat controller for a chemistry laboratory
> and need to find a supplier of "selfsticking heating mats" or "heating
> strips". For the prototype I have bought one at unreasonable price $100. It
> is some kind of metal foil etched in labyrint pattern and covered with some
> heat resistant plastics. It seems to be produced by 3M, I just doubt the
> factory will supply 5 pc this year and 5 pc the next. It does not have to be
> 3M production, any other will do. Just need a low voltage type (safety rules
> do not allow above 24V AC), about 75 - 100 W.
>
> Can you recommend any source ? Europe is preferred but I believe UPS can
> deliver from everywhere. Thanks.
>
> BTW, some Dallas digital thermometer chip was mentioned on the list lately.
> What is its resolution ? I would possibly consider using this one.
>
> Josef

I have successfully used some "K" type thermocouple wire, cut to an
appropriate length to generate the temperature required.
I am currently using around 0.5mm thick stainless steel sheathed wire
and it's running at around 120 deg C.

Cheers
--
*********************************************************
Ken Parkyn                 email: spam_OUTK.ParkynTakeThisOuTspamsct.gu.edu.au
Electronics Workshop phone:(07)3875 7289 fax:(07)38757151
Faculty of Science and Technology
Griffith University P.O.Box 185 Nathan Qld.4111 Australia
*********************************************************

1997\08\08@040627 by Ross McKenzie

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At 07:13 AM 8/8/97 +0200, you wrote:
>I am just about to design a termostat controller for a chemistry laboratory
>and need to find a supplier of "selfsticking heating mats" or "heating
>strips". For the prototype I have bought one at unreasonable price $100. It
>is some kind of metal foil etched in labyrint pattern and covered with some
>heat resistant plastics. It seems to be produced by 3M, I just doubt the
>factory will supply 5 pc this year and 5 pc the next. It does not have to be
>3M production, any other will do. Just need a low voltage type (safety rules
>do not allow above 24V AC), about 75 - 100 W.
>
>Can you recommend any source ? Europe is preferred but I believe UPS can
>deliver from everywhere. Thanks.

Try RS Components of the UK (probably has European offices also). They have
a range.

Regards,

Ross McKenzie
Melbourne Australia

1997\08\08@043941 by David BALDWIN

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Hello everybody! I have an EXPRESSSSSSSSS request: I need all the code
you have (if possible of course...) to drive I2C devices. I have to make
communications between PICs and between PICS and sensors. I think it is
the best protocol. The distance is about 60m in noisy environment. Any
help is apreciate. Thanks a lot.

David

1997\08\11@054535 by Keith Dowsett

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At 07:13 08/08/97 +0200, you wrote:
>I am just about to design a termostat controller for a chemistry laboratory
>and need to find a supplier of "selfsticking heating mats" or "heating
>strips". For the prototype I have bought one at unreasonable price $100. It
>is some kind of metal foil etched in labyrint pattern and covered with some
>heat resistant plastics. It seems to be produced by 3M, I just doubt the
>factory will supply 5 pc this year and 5 pc the next. It does not have to be
>3M production, any other will do. Just need a low voltage type (safety rules
>do not allow above 24V AC), about 75 - 100 W.
>
>Can you recommend any source ? Europe is preferred but I believe UPS can
>deliver from everywhere. Thanks.
>
>BTW, some Dallas digital thermometer chip was mentioned on the list lately.
>What is its resolution ? I would possibly consider using this one.
>
>Josef

RS components stock a wide range of heating mats rated up to 200C. You might
start at their web page http://www.rs-components.com/rs and locate your
nearest branch.

Keith.
------------------------------------------------------------
Keith Dowsett         "Variables won't; constants aren't."

E-mail: .....kdowsettKILLspamspam@spam@rpms.ac.uk  or kdowsettspamKILLspamgeocities.com

WWW: http://kd.rpms.ac.uk/index.htm
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