Yep.  I have a pressure sensor in here as well, though pressure has been 
fairly close to standard so far.

Cheers,
-Neil.


On Wednesday 01 June 2005 06:01 am, Bob Ammerman scribbled:
> Keep in mind that the boiling point is dependent on atmospheric pressure,
> which is not a constant.
>
> Bob Ammerman
> RAm Systems
>
> ----- Original Message -----
> From: "Lonnie" <kf4haz@cashette.com>
> To: "Microcontroller discussion list - Public." <piclist@mit.edu>
> Sent: Wednesday, June 01, 2005 3:00 AM
> Subject: Re: [OT] Common, safe boiling points.
>
> > If I am not mistaken solutions of water and say sugar or salt will have
> > higher boiling points dependant on the concentration.
> > In short add a teaspoonful of sugar and wait till it starts boiling
> > again, measure temp with candy thermometer and sensor, then add more and
> > repeat until you have covered the desired range.
> >
> > KF4HAZ - Lonnie Underwood
> >
> > ----- From: "PicDude" <picdude2@
> > Hi all,
> >
> > Trying to calibrate a resistive temperature sensor, but my existing
> > method is
> > producing some inconsistent results.  Pot of oil on a stove at various
> > temps
> > and comparing the sensor to an LM35DT (~0.5 deg C accuracy).  The problem
> > seems to be that the resistive sensor takes a significant time to come up
> > to
> > the temp of the oil and settle to a stable resistance.  If I read the
> > data points when the oil temp is gradually rising, it varies
> > significantly from when the oil temp is decreasing.   It is very
> > difficult to get the oil to stay still at a specific temp for any decent
> > length of time.  However, in a
> > pot of boiling water, I can get a stable and trustable measurement.
> >
> > So I need to do this for a range of around room temp to a few hundred
> > degrees
> > F (say 160 deg C), and would like to select easy-to-find chemicals that
> > have
> > various boiling points in this range and would be safe for me to boil on
> > a stove.  I have found a bunch on the internet (example:
> > http://www.engineeringtoolbox.com/boiling-points-fluids-gases-24_155.html
> > ),
> > but I'm not sure where to find much of these, and if they're safe to boil
> > on
> > a stove.
> >
> > Any ideas how I can go about this?
> >
> > Cheers,
> > -Neil.
> >
> >
> >
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