Visions of ping pong balls, ball bearings and oil still dance in my head
from the "tilt"  posts.

If you boiled ball bearings (not sure of their boiling point) along with the
oil, then dumped all into a preheated Pyrex beaker that was some how
insulated, would that hold the temperature longer?

I was going to say to use a Styrofoam cup as the insulated container, but
remembered I melted one in microwave while melting butter and frosting for
the Danish rolls I was cooking on my George Forman grill.  So even the
McDonald's coffee cups might not hold the hot oil.

Bill

----- Original Message ----- 
From: "Lonnie" <kf4haz@cashette.com>
To: "Microcontroller discussion list - Public." <piclist@mit.edu>
Sent: Wednesday, June 01, 2005 12:00 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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