subzero temp monitoring
Hi Fellow Stampers...
I have an older chest freezer (I'm guessing about 25 years old) whose
reliability I am starting to question. Since I have a great deal of food
stored in it, I am trying to come up with a way to monitor it so that it
don't go out on me and everything spoil without my knowing it. It would
be relatively to hook up a thermistor and use the RCTIME instruction, or
a DS1620, or ADC with an LM34. It would also be easy to do some type of
temperature readout on 7 segment display (somewhere, I think I have a
couple of sample MAX7219's sitting around) and sound a buzzer or flash a
light if the temp exceeds some setpoint. The problem with all this is I
have to run some sort of umbilical cord into the freezer and I can't
think of any elegant way to do this without compromising the rubber seal
and visual appearance. What would be really nice is some sort of
wireless method. Is this possible? The temperature in the freezer is
set to stay around zero -- how would this affect the reliability of
electronic components and battery life? Could some type of wireless link
penetrate the metal 'shell' around the freezer? If the answers to these
questions pose no problems, would I be better off to purchase something
already on the market (if such an item exists)? From Rat Shack, perhaps?
Thanks,
Aaron
I have an older chest freezer (I'm guessing about 25 years old) whose
reliability I am starting to question. Since I have a great deal of food
stored in it, I am trying to come up with a way to monitor it so that it
don't go out on me and everything spoil without my knowing it. It would
be relatively to hook up a thermistor and use the RCTIME instruction, or
a DS1620, or ADC with an LM34. It would also be easy to do some type of
temperature readout on 7 segment display (somewhere, I think I have a
couple of sample MAX7219's sitting around) and sound a buzzer or flash a
light if the temp exceeds some setpoint. The problem with all this is I
have to run some sort of umbilical cord into the freezer and I can't
think of any elegant way to do this without compromising the rubber seal
and visual appearance. What would be really nice is some sort of
wireless method. Is this possible? The temperature in the freezer is
set to stay around zero -- how would this affect the reliability of
electronic components and battery life? Could some type of wireless link
penetrate the metal 'shell' around the freezer? If the answers to these
questions pose no problems, would I be better off to purchase something
already on the market (if such an item exists)? From Rat Shack, perhaps?
Thanks,
Aaron
Comments
agarb@j... wrote:
>
> Hi Fellow Stampers...
>
> I have an older chest freezer (I'm guessing about 25 years old) whose
> reliability I am starting to question. Since I have a great deal of food
> stored in it, I am trying to come up with a way to monitor it so that it
> don't go out on me and everything spoil without my knowing it. It would
> be relatively to hook up a thermistor and use the RCTIME instruction, or
> a DS1620, or ADC with an LM34. It would also be easy to do some type of
> temperature readout on 7 segment display (somewhere, I think I have a
> couple of sample MAX7219's sitting around) and sound a buzzer or flash a
> light if the temp exceeds some setpoint. The problem with all this is I
> have to run some sort of umbilical cord into the freezer and I can't
> think of any elegant way to do this without compromising the rubber seal
> and visual appearance. What would be really nice is some sort of
> wireless method. Is this possible? The temperature in the freezer is
> set to stay around zero -- how would this affect the reliability of
> electronic components and battery life? Could some type of wireless link
> penetrate the metal 'shell' around the freezer? If the answers to these
> questions pose no problems, would I be better off to purchase something
> already on the market (if such an item exists)? From Rat Shack, perhaps?
>
> Thanks,
> Aaron
might set off an inside audio alarm when the temperature falls below
freezing, but may require some research on electronic-device characteristics
related to temperature. Good luck.
I was testing a thermistor with the basic stamp and a wireless link.· I found that if I put the unit in my refigerator that the wireless transmitter could not penetrate the metal shell of the fridge.· Almost all of the wireless units are such low power that they have little chance of getting a signal through an enclosed box of metal.· Also, I tried it in the freezer portion of my fridge, and the 9V battery while in the freeqer would start dropping it's voltage and after a couple of hours, it didn't run the stamp anymore.· Once it thawed the battery worked OK again.· I think you would have to run a wire.· It might be possible to use one of those X-10 type signal and send the signal over the AC power lines.· If your freezer has a light inside of it, this would give you a place to attach to and also to get power from.· You would just have to disable the light switch so that the light was on all the time.
Original Message
From: agarb@juno.com [noparse]/noparse][url=mailto:agarb@juno.com]mailto:agarb@juno.com[/url
Sent: Tuesday, January 16, 2001 5:37 PM
To: basicstamps@egroups.com
Subject: [noparse][[/noparse]basicstamps] subzero temp monitoring
Hi Fellow Stampers...
I have an older chest freezer (I'm guessing about 25 years old) whose
reliability I am starting to question.· Since I have a great deal of food
stored in it, I am trying to come up with a way to monitor it so that it
don't go out on me and everything spoil without my knowing it.· It would
be relatively to hook up a thermistor and use the RCTIME instruction, or
a DS1620, or ADC with an LM34.· It would also be easy to do some type of
temperature readout on 7 segment· display (somewhere, I think I have a
couple of sample MAX7219's sitting around) and sound a buzzer or flash a
light if the temp exceeds some setpoint.· The problem with all this is I
have to run some sort of umbilical cord into the freezer and I can't
think of any elegant way to do this without compromising the rubber seal
and visual appearance.· What would be really nice is some sort of
wireless method.· Is this possible?· The temperature in the freezer is
set to stay around zero -- how would this affect the reliability of
electronic components and battery life?· Could some type of wireless link
penetrate the metal 'shell' around the freezer?· If the answers to these
questions pose no problems, would I be better off to purchase something
already on the market (if such an item exists)? From Rat Shack, perhaps?
Thanks,
Aaron
A non-wireless idea. If you have access to the inner liner from the outside
(perhaps through the compressor area), you could put your temp sensor on the
insulation side of the inner shell.
Regards,
Daniel McGlothin
Original Message
From: agarb@j... [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=XTf-QiCWAIEPH04caXCaOQSVjnC_0lQgDGvUzVGZe1pO5Y2TGWEqT3W68q6ZBp2H_D36691F1w]agarb@j...[/url
Sent: Tuesday, January 16, 2001 8:37 PM
To: basicstamps@egroups.com
Subject: [noparse][[/noparse]basicstamps] subzero temp monitoring
Hi Fellow Stampers...
I have an older chest freezer (I'm guessing about 25 years old) whose
reliability I am starting to question. Since I have a great deal of food
stored in it, I am trying to come up with a way to monitor it so that it
don't go out on me and everything spoil without my knowing it. It would
be relatively to hook up a thermistor and use the RCTIME instruction, or
a DS1620, or ADC with an LM34. It would also be easy to do some type of
temperature readout on 7 segment display (somewhere, I think I have a
couple of sample MAX7219's sitting around) and sound a buzzer or flash a
light if the temp exceeds some setpoint. The problem with all this is I
have to run some sort of umbilical cord into the freezer and I can't
think of any elegant way to do this without compromising the rubber seal
and visual appearance. What would be really nice is some sort of
wireless method. Is this possible? The temperature in the freezer is
set to stay around zero -- how would this affect the reliability of
electronic components and battery life? Could some type of wireless link
penetrate the metal 'shell' around the freezer? If the answers to these
questions pose no problems, would I be better off to purchase something
already on the market (if such an item exists)? From Rat Shack, perhaps?
Thanks,
Aaron
project you can do yourself, regardless of whether someone's already done
it. <g>
-- Mitch
Original Message
From: LarryGaminde [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=znCQyE5uhUWl2-UJZDvnbomqXv79qyMrug7qUhAR75jiXveyqpuUKQpJKMxlX-rRlfMCFL4cVWZTChkV]lgaminde@t...[/url
Sent: Wednesday, January 17, 2001 9:16 AM
To: basicstamps@egroups.com
Subject: Re: [noparse][[/noparse]basicstamps] subzero temp monitoring
Freezer alarms are about 25 bucks ( buy one )
agarb@j... wrote:
>
> Hi Fellow Stampers...
>
> I have an older chest freezer (I'm guessing about 25 years old) whose
> reliability I am starting to question. Since I have a great deal of food
> stored in it, I am trying to come up with a way to monitor it so that it
> don't go out on me and everything spoil without my knowing it. It would
> be relatively to hook up a thermistor and use the RCTIME instruction, or
> a DS1620, or ADC with an LM34. It would also be easy to do some type of
> temperature readout on 7 segment display (somewhere, I think I have a
> couple of sample MAX7219's sitting around) and sound a buzzer or flash a
> light if the temp exceeds some setpoint. The problem with all this is I
> have to run some sort of umbilical cord into the freezer and I can't
> think of any elegant way to do this without compromising the rubber seal
> and visual appearance. What would be really nice is some sort of
> wireless method. Is this possible? The temperature in the freezer is
> set to stay around zero -- how would this affect the reliability of
> electronic components and battery life? Could some type of wireless link
> penetrate the metal 'shell' around the freezer? If the answers to these
> questions pose no problems, would I be better off to purchase something
> already on the market (if such an item exists)? From Rat Shack, perhaps?
>
> Thanks,
> Aaron
can spend four times as much in parts not even considering the opportunity
cost of your labor? This kind of project defines the original meaning of the
word "hack": to re-purpose object in way that creates a whole greater than
the sum of the parts that is at once elegant yet unecessary. That was before
journalists used the new derogatory meaning of hack as defining the unlawful
and destructive breaking into networked systems.
Right on and big Tim-Taylor Tool-Time grunt Aaron.
Original Message
From: LarryGaminde [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=MZ6mVDXjOdz475-lMvT5HwQld0IpKx1o4ugoGBg4f6GjPeH0hw9pKfMsJVRDviv8LGzH59OpCipUSqirnm-k]lgaminde@t...[/url
Sent: Wednesday, January 17, 2001 7:16 AM
To: basicstamps@egroups.com
Subject: Re: [noparse][[/noparse]basicstamps] subzero temp monitoring
Freezer alarms are about 25 bucks ( buy one )
agarb@j... wrote:
>
> Hi Fellow Stampers...
>
> I have an older chest freezer (I'm guessing about 25 years old) whose
> reliability I am starting to question. Since I have a great deal of food
> stored in it, I am trying to come up with a way to monitor it so that it
> don't go out on me and everything spoil without my knowing it. It would
> be relatively to hook up a thermistor and use the RCTIME instruction, or
> a DS1620, or ADC with an LM34. It would also be easy to do some type of
> temperature readout on 7 segment display (somewhere, I think I have a
> couple of sample MAX7219's sitting around) and sound a buzzer or flash a
> light if the temp exceeds some setpoint. The problem with all this is I
> have to run some sort of umbilical cord into the freezer and I can't
> think of any elegant way to do this without compromising the rubber seal
> and visual appearance. What would be really nice is some sort of
> wireless method. Is this possible? The temperature in the freezer is
> set to stay around zero -- how would this affect the reliability of
> electronic components and battery life? Could some type of wireless link
> penetrate the metal 'shell' around the freezer? If the answers to these
> questions pose no problems, would I be better off to purchase something
> already on the market (if such an item exists)? From Rat Shack, perhaps?
>
> Thanks,
> Aaron
switch will go, and tell you that it's not cold enough..
seeing as it should never happen, you wouldn't have to keep setting it
up..
Jason Lavoie
agarb@j... wrote:
>
> Hi Fellow Stampers...
>
> I have an older chest freezer (I'm guessing about 25 years old) whose
> reliability I am starting to question. Since I have a great deal of food
> stored in it, I am trying to come up with a way to monitor it so that it
> don't go out on me and everything spoil without my knowing it. It would
> be relatively to hook up a thermistor and use the RCTIME instruction, or
> a DS1620, or ADC with an LM34. It would also be easy to do some type of
> temperature readout on 7 segment display (somewhere, I think I have a
> couple of sample MAX7219's sitting around) and sound a buzzer or flash a
> light if the temp exceeds some setpoint. The problem with all this is I
> have to run some sort of umbilical cord into the freezer and I can't
> think of any elegant way to do this without compromising the rubber seal
> and visual appearance. What would be really nice is some sort of
> wireless method. Is this possible? The temperature in the freezer is
> set to stay around zero -- how would this affect the reliability of
> electronic components and battery life? Could some type of wireless link
> penetrate the metal 'shell' around the freezer? If the answers to these
> questions pose no problems, would I be better off to purchase something
> already on the market (if such an item exists)? From Rat Shack, perhaps?
>
> Thanks,
> Aaron
> would give you a place to attach to and also to get power from. You
> would just have to disable the light switch so that the light was on
> all the time.
careful.. you'd be amazed how much heat a lightbulb can produce..
Jason Lavoie
out a turkey you can order one and have it delivered. Don't forget
to get a web address so you can check the temperature from the
office. We all know that it's coming to that so it looks like you
can get a jumo on it. GO FOR IT !! [noparse]:)[/noparse]
Dave
--- In basicstamps@egroups.com, "Mitchell D. Miller" <mdmiller2@h...>
wrote:
> Larry, You're just TOO practical. There's nothing like throwing
$100 at a
> project you can do yourself, regardless of whether someone's
already done
> it. <g>
>
> -- Mitch
>
>
Original Message
> From: LarryGaminde [noparse][[/noparse]mailto:lgaminde@t...]
> Sent: Wednesday, January 17, 2001 9:16 AM
> To: basicstamps@egroups.com
> Subject: Re: [noparse][[/noparse]basicstamps] subzero temp monitoring
>
>
> Freezer alarms are about 25 bucks ( buy one )
>
> agarb@j... wrote:
> >
> > Hi Fellow Stampers...
> >
> > I have an older chest freezer (I'm guessing about 25 years old)
whose
> > reliability I am starting to question. Since I have a great deal
of food
> > stored in it, I am trying to come up with a way to monitor it so
that it
> > don't go out on me and everything spoil without my knowing it.
It would
> > be relatively to hook up a thermistor and use the RCTIME
instruction, or
> > a DS1620, or ADC with an LM34. It would also be easy to do some
type of
> > temperature readout on 7 segment display (somewhere, I think I
have a
> > couple of sample MAX7219's sitting around) and sound a buzzer or
flash a
> > light if the temp exceeds some setpoint. The problem with all
this is I
> > have to run some sort of umbilical cord into the freezer and I
can't
> > think of any elegant way to do this without compromising the
rubber seal
> > and visual appearance. What would be really nice is some sort of
> > wireless method. Is this possible? The temperature in the
freezer is
> > set to stay around zero -- how would this affect the reliability
of
> > electronic components and battery life? Could some type of
wireless link
> > penetrate the metal 'shell' around the freezer? If the answers
to these
> > questions pose no problems, would I be better off to purchase
something
> > already on the market (if such an item exists)? From Rat Shack,
perhaps?
> >
> > Thanks,
> > Aaron
In regard to the freezer, I worked for an appliance repair shop at
one time, and one method we used to monitor the refrigeration cycle
of a freezer was to route our wires through the drain line found at
the bottom. This saves the headache of wireless transmission as well
as door sealing.
Many older refrigerators have a small drain hole in the bottom that
connects to the drip pan underneath. Some freezers have this too.
It would be a relatively simple matter to route your sensor or 9 volt
power wires through this hose (if it is there). The drain hole is
sometimes hidden behind a false-panel, frost, or behind/under the
drawers, so if you don't see it it doesn't mean it isn't there.
Sometimes they are plugged with cotton or other water-permeable
materials to prevent heat loss; don't be afraid to poke that stuff
aside.
A rule of thumb - if you have a drip pan (visible as a yellowish pan
underneath the condensor coils on the bottom of the fridge/freezer),
you probably have a drain hole.
--- In basicstamps@egroups.com, agarb@j... wrote:
> Hi Fellow Stampers...
>
> I have an older chest freezer (I'm guessing about 25 years old)
whose
> reliability I am starting to question. Since I have a great deal
of food
> stored in it, I am trying to come up with a way to monitor it so
that it
> don't go out on me and everything spoil without my knowing it. It
would
> be relatively to hook up a thermistor and use the RCTIME
instruction, or
> a DS1620, or ADC with an LM34. It would also be easy to do some
type of
> temperature readout on 7 segment display (somewhere, I think I
have a
> couple of sample MAX7219's sitting around) and sound a buzzer or
flash a
> light if the temp exceeds some setpoint. The problem with all this
is I
> have to run some sort of umbilical cord into the freezer and I can't
> think of any elegant way to do this without compromising the rubber
seal
> and visual appearance. What would be really nice is some sort of
> wireless method. Is this possible? The temperature in the freezer
is
> set to stay around zero -- how would this affect the reliability of
> electronic components and battery life? Could some type of
wireless link
> penetrate the metal 'shell' around the freezer? If the answers to
these
> questions pose no problems, would I be better off to purchase
something
> already on the market (if such an item exists)? From Rat Shack,
perhaps?
>
> Thanks,
> Aaron
without any freezer fault. craig
On Wed, 17 Jan 2001 17:08:00 -0500 Jason Lavoie
<jlavoie@e...> writes:
> just hang a block of ice from a micro switch.. if the ice melts, the
> switch will go, and tell you that it's not cold enough..
> seeing as it should never happen, you wouldn't have to keep setting
> it
> up..
>
> Jason Lavoie
>
> agarb@j... wrote:
> >
> > Hi Fellow Stampers...
> >
> > I have an older chest freezer (I'm guessing about 25 years old)
> whose
> > reliability I am starting to question. Since I have a great deal
> of food
> > stored in it, I am trying to come up with a way to monitor it so
> that it
> > don't go out on me and everything spoil without my knowing it. It
> would
> > be relatively to hook up a thermistor and use the RCTIME
> instruction, or
> > a DS1620, or ADC with an LM34. It would also be easy to do some
> type of
> > temperature readout on 7 segment display (somewhere, I think I
> have a
> > couple of sample MAX7219's sitting around) and sound a buzzer or
> flash a
> > light if the temp exceeds some setpoint. The problem with all
> this is I
> > have to run some sort of umbilical cord into the freezer and I
> can't
> > think of any elegant way to do this without compromising the
> rubber seal
> > and visual appearance. What would be really nice is some sort of
> > wireless method. Is this possible? The temperature in the
> freezer is
> > set to stay around zero -- how would this affect the reliability
> of
> > electronic components and battery life? Could some type of
> wireless link
> > penetrate the metal 'shell' around the freezer? If the answers to
> these
> > questions pose no problems, would I be better off to purchase
> something
> > already on the market (if such an item exists)? From Rat Shack,
> perhaps?
> >
> > Thanks,
> > Aaron
>
>
>
________________________________________________________________
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ability to preserve food. The temp needs to be around 0 to -10 F to keep
most foods from going bad. I had a freezer that I thought was working fine
until I took some food out after a few months and found that it had spoiled.
Even though the freezer was still icy and frosty inside, the temp was in the
20's.
Pat
> except for sublimation (spelling?) which will cause the ice to go away
> without any freezer fault. craig
>
> On Wed, 17 Jan 2001 17:08:00 -0500 Jason Lavoie
> <jlavoie@e...> writes:
> > just hang a block of ice from a micro switch.. if the ice melts, the
> > switch will go, and tell you that it's not cold enough..
> > seeing as it should never happen, you wouldn't have to keep setting
> > it
> > up..
> >
> > Jason Lavoie
> >
> > agarb@j... wrote:
> > >
> > > Hi Fellow Stampers...
> > >
> > > I have an older chest freezer (I'm guessing about 25 years old)
> > whose
> > > reliability I am starting to question. Since I have a great deal
> > of food
> > > stored in it, I am trying to come up with a way to monitor it so
> > that it
> > > don't go out on me and everything spoil without my knowing it. It
> > would
> > > be relatively to hook up a thermistor and use the RCTIME
> > instruction, or
> > > a DS1620, or ADC with an LM34. It would also be easy to do some
> > type of
> > > temperature readout on 7 segment display (somewhere, I think I
> > have a
> > > couple of sample MAX7219's sitting around) and sound a buzzer or
> > flash a
> > > light if the temp exceeds some setpoint. The problem with all
> > this is I
> > > have to run some sort of umbilical cord into the freezer and I
> > can't
> > > think of any elegant way to do this without compromising the
> > rubber seal
> > > and visual appearance. What would be really nice is some sort of
> > > wireless method. Is this possible? The temperature in the
> > freezer is
> > > set to stay around zero -- how would this affect the reliability
> > of
> > > electronic components and battery life? Could some type of
> > wireless link
> > > penetrate the metal 'shell' around the freezer? If the answers to
> > these
> > > questions pose no problems, would I be better off to purchase
> > something
> > > already on the market (if such an item exists)? From Rat Shack,
> > perhaps?
> > >
> > > Thanks,
> > > Aaron
> >
> >
> >
>
> ________________________________________________________________
> GET INTERNET ACCESS FROM JUNO!
> Juno offers FREE or PREMIUM Internet access for less!
> Join Juno today! For your FREE software, visit:
> http://dl.www.juno.com/get/tagj.
>
>
>
>
X-Mailer: Juno 1.49
X-Juno-Line-Breaks: 0-23
X-Status: Unsent
A popular topic... if you want something that melts
at a lower temperature than water to close some
contacts try salted water adjusted to work - and
I'd suggest a magnet and reed switch instead of
micro switch.
I made a freezer alarm using a $20. module which
ran on 1.5v with LCD had max/min alarm outputs and
readings... Radio Shack - of course they discontinued
it :-( . In practice it was used in a chest freezer
with skinny wires going by the seal gasket... of course
that's where the rodents tried to get in and chewed
through the thermistor sense wires :-( .
Bimetal strips can work at these temperatures - the
problem being keeping the contacts clean.
Good luck with the project... for a simple alarm
with hysteresis it can be done with a thermistor
and op amp and some resistors and a piezo buzzer.
premena
________________________________________________________________
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As for running wires through the door of a freezer:
How about thin strips of tinfoil, used just where you transfer from the
inside to the outside of the freezer?
Would be fragile, but perhaps a bit of packaging tape over them would do
the trick. These "wires" would probably still allow a very good seal as
they are so thin.
Have a nice evening,
Paul
On Thu, 18 Jan 2001, s premena wrote:
> it :-( . In practice it was used in a chest freezer
> with skinny wires going by the seal gasket... of course
> that's where the rodents tried to get in and chewed
> through the thermistor sense wires :-( .
>
> premena
>
> ________________________________________________________________
> GET INTERNET ACCESS FROM JUNO!
> Juno offers FREE or PREMIUM Internet access for less!
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>
>
Original Message
From: Paul J. Csonka [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=y3IgqerGIf2BCc92g2liKat7HD7INFxu_F3EjPDqUOChsqWlnUE6GbEJ_8BdcGCeE1rEJF1N-ZY]csonka@e...[/url
Sent: Thursday, January 18, 2001 5:57 PM
To: basicstamps@egroups.com
Subject: Re: [noparse][[/noparse]basicstamps] Re: subzero temp monitoring
To whoever started this thread (I'm sorry I don't remember).
As for running wires through the door of a freezer:
How about thin strips of tinfoil, used just where you transfer from the
inside to the outside of the freezer?
Would be fragile, but perhaps a bit of packaging tape over them would do
the trick. These "wires" would probably still allow a very good seal as
they are so thin.
Paul - A commercially available version of this idea are flat speaker
cables, designed to be fastened to a wall and then painted the wall color.
Dennis
used for wiring electricity into doll houses. It is the thinnest wire I
have seen and it has a sticky side for sticking it to the freezer. You can
get it at most hobby shops, or craft stores.
>
Original Message
> From: Dennis P. O'Leary [noparse]/noparse]SMTP:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=P4cxuz39FKaj7umD2AxzqIjSPKw_N9SHc5ihAsHPm7hRFujtl3jNNWhp4AffqsQB6TT2fLlGloTG6A]doleary@h...[/url
> Sent: Friday, January 19, 2001 12:01 AM
> To: basicstamps@egroups.com
> Subject: RE: [noparse][[/noparse]basicstamps] Re: subzero temp monitoring
>
>
>
>
Original Message
> From: Paul J. Csonka [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=DlIW5PvRrWZIgzYzdjgspxeCso1loPh5p4drtUnc3ImMSaetoyPI5UvahOt1jbAO6iC28WiH]csonka@e...[/url
> Sent: Thursday, January 18, 2001 5:57 PM
> To: basicstamps@egroups.com
> Subject: Re: [noparse][[/noparse]basicstamps] Re: subzero temp monitoring
>
>
> To whoever started this thread (I'm sorry I don't remember).
>
> As for running wires through the door of a freezer:
>
> How about thin strips of tinfoil, used just where you transfer from the
> inside to the outside of the freezer?
>
> Would be fragile, but perhaps a bit of packaging tape over them would do
> the trick. These "wires" would probably still allow a very good seal as
> they are so thin.
>
> Paul - A commercially available version of this idea are flat speaker
> cables, designed to be fastened to a wall and then painted the wall color.
> Dennis
>
>
to my earlier question about monitoring the temperature in my freezer. I
think I am going to look for a commercial unit first -- after all, my
time's worth something. If that don't pan out, I will bear in mind the
suggestions to find a drain line or use flat speaker wire or flat
"doll-house" wire to get my signals into the freezer. Thanks again. --
Aaron