Jim Korman writes:
> This type of humidity sensor is as accurate as the temperature sensor on
> the mirror, measuring dew(frost) point. Main problem is keeping the
> mirror clean. Any contamination leads to errors due to (usually) premature
> condensation. Also you would want the mirror to have a very low thermal
> mass.

	Thanks.  Just what I figured.  At least it's not a
totally crazy idea.

Martin McCormick
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