[time-nuts] Capacitive temperature sensing
Mike Monett
XDE-L2G3 at myamail.com
Sat Aug 23 16:35:00 UTC 2008
"Mike Monett" <XDE-L2G3 at myamail.com> wrote:
[...]
> Gentlemen,
> The problem is very simple. If the sensor lead that contacts the
> mercury has a diameter of 0.010 inch, with a flat end, and is 100
> microinches away from the mercury, the capacitance is 0.35 pf.
Sorry, I used a bad formula for the area of a circle. The actual
capacitance is 0.1767 pF, still well within the capability of the
AD7747.
Regards,
Mike Monett
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