Glass tubing would also be very nice, if you are worried about chemical
contamination. Not such a great heat conductor but easy to seal and very
clean.
On Fri, Nov 7, 2008 at 12:25, Doug Collinge <[EMAIL PROTECTED]> wrote:
> You could do the very same thing with stainless hobby tubing. Not so easy
> to close up the end however. Mind you, you could just glue the sensor into
> the end of the tube with epoxy if that would be ok.
>
>
> On Fri, Nov 7, 2008 at 12:22, Mike Zimmerman <[EMAIL PROTECTED]> wrote:
>
>> Doug,
>>
>> Copper tube would be unsatisfactory for this project because they will be
>> used in fishtanks.
>> The copper can leech killing invertebrates in the tank. I was thinking an
>> RTV silicone or some
>> type of epoxy. I would assume each covering would change the temperature
>> readings and would
>> have to be calibrated for.
>>
>> Mike
>>
>>
>> ----- Original Message -----
>> From: "Doug Collinge" <[EMAIL PROTECTED]>
>> To: [email protected]
>> Sent: Friday, November 7, 2008 3:20:14 PM (GMT-0500) Auto-Detected
>> Subject: Re: [Owfs-developers] DS18S20 to get water temperature
>>
>> I built several probes for measuring the temperature of hot water. They
>> are made of copper refrigeration tube, closed at one end by sawing a cross
>> in it, folding over, and soldering. I wired up a sensor to some telephone
>> cable and stuck it into the tube with some heat sink gunk, then closed the
>> whole thing with some special heatshrink tubing that has an internal layer
>> that melts to make a great seal. Very successful probes but a fairly high
>> thermal mass. The copper tube goes into a fitting made out of a compression
>> union cut in half with the brass compression ring replaced with an o-ring.
>> Works very well - couldn't be better, in fact.
>>
>> I made some cold water probes just by putting the same heatshrink right
>> over the wire and sensor, leaving the sensor package sticking out a bit.
>> Also very successful and much less thermal mass.
>>
>> On Fri, Nov 7, 2008 at 11:56, Donald J. Organ IV <[EMAIL PROTECTED]>wrote:
>>
>>> Has anyone created a water temperature probe using the DS18S20?? I am
>>> assuming in order to do this I will need to encase it in some type of epoxy
>>> that will not effect the temperature readings.
>>>
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