Haven't used it, but Honeywell makes a capacitive humidity sensor that
is just under $6.  With a bit of creativity and some functions from a
PIC: comparator, timer, A2D with thermistor - a cheap humidity sensor
could be devised. Alternatively you could build it into an oscillator
and measure the frequency.  With this sensor, calibration on a per
unit basis is required.



On Tue, Dec 15, 2009 at 11:01 AM, alan smith <micro_eng2@yahoo.com> wrote:
> Besides the Sensirion SHT11, what other humidity sensors are available th=
at others have used? =A0SHT11 is a nice interface, works very well BUT...a =
little $$$ so is there a less expensive solution?
>
>
>
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