piclist 1999\10\28\085855a >
Thread: Humidity sensors
face BY : fernteix email (remove spam text)

I would use a reflective type of optocoupler and choose an optimal position
to get a "total" reflection without fog. In this position the intensity of
reflected light with and without fog should be very different.
A OPA as comparator will do the rest, I believe. Some small Pics have
comparators inside.


{Original Message removed}

See also: www.piclist.com/techref/io/sensors.htm?key=sensor
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Subject (change) Humidity sensors

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