Solid state humidity sensors?

[Greg Campbell]

Here's a question for the electronic nerds out there. :)

I recently bought a nifty USB based multichannel A/D converter and am looking to build a portable weather station. Getting temperature, wind speed, etc. is all fairly straightforward (pending calibration!) but I know nothing about humidity sensors. Does anyone have exerience with these?

I could build a wet/dry termocouple/thermistor setup, but that would require a small reservoir of water; I'd prefer a no-maintenance system.

Thanks!

-Greg

[John Diel]

Something like this maybe?

Sensorelement.com (http://www.sensorelement.com/humidity/808H5V5.pdf)

[Tim Johnson]

Something like this maybe?

Sensorelement.com (http://www.sensorelement.com/humidity/808H5V5.pdf)
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Thats pretty niffty!

[Greg Campbell]

TY, John!

After looking about, I think I'm going to go forego using the A/D, and build a go-anywhere serial port version with one of these (http://www.preconusa.com/humidity_moisture_dew_sensors.htm) or similar sensors. They spit ASCII text straight into your PC. Slick!

[Michael P. Morris]

Or hey, if you feel like spending about 5K, you can get yourself a Vaisala WXT510 Multi-Sensor (http://www.vaisala.com/businessareas/instruments/products/weathermulti-sensor). It's a neat little all-in-one, about the size of a 2-liter bottle that they are going to start using in early 2007 on the Oklahoma City Urban Micronet. I just wish they had a wedding registry...