[aklug] Re: Making a temperature sensor

Bob- I don't have any suggestions on potting material yet, but have a
question for you. Are you using this as an input device for logging or
notification/alarm purposes? I have recently started to do some digging on
this subject and found interesting info on a project at
http://quozl.netrek.org/ts/ and be sure to look at the project to monitor
emu fat temperature at http://quozl.netrek.org/ts/emu.html !
I'd be interested to follow this project details if you are willing.
Ron Yeager

Date: Sat, 21 Nov 2009 14:37:48 -0900
From: Bob at Estiminc <bob@estimations.com>
Subject: [aklug] Making a temperature sensor

I'm interested in making up my own temperature=20
sensors using National Semiconductor LM34 IC's.=20
It looks like a transistor, a small can with=20
three wires coming out of it. Connect one wire to=20
ground, the 2nd to 5VDC and the third puts out a linear +10.0 mV/=B0F.

spec sheet: http://www.national.com/mpf/LM/LM34.html#Overview

My idea is to solder up the cable connections,=20
shrink some heat tube around each leg, slip it=20
all into a short length of 1/4" copper tube and=20
seal it all up with some sort of potting compound.

I have a couple of questions. First of all, does=20
this sound like a good approach? Any better ideas? Hints? Tips? Tricks?

Secondly, I'm looking for recommendations or=20
thoughts on a good potting compound -- something=20
thermally conductive but electrically insulating.=20
Is RTV silicon a suitable candidate?

Bob Crosby

-- 
Ron Yeager
Ron's Computer Service
(907) 229-8586
ronyeager@rcsak.com
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