Jeff: Thanks for all the effort to get a better understanding of how the sensors work.
I filled out a technical response request at two different sensor manufacturers to also get a better understanding. Here is one response from Vaisala.com re: the effects of liquid droplets... "If the water droplets are large enough or if they are able to collect on the sensor surface or connector, you would get some measurement errors. Water could short out the electrical measurement and cause the unit to read from one extreme to the other. The filter should be able to protect the sensor from some small particles but if there is enough free water it may be an issue. In any case, once the senor dries out the readings should recover." -Mark
