hi,
we are currently working on a MEMS based moisture sensor to measure the moisture
content is soils.
The problem we are facing is to find a suitable water permeable membrane for out
design.
It would be great is someone out there could help us out with a few suggestions
as to what
type of material would be good to be used as a water permeable membrane.
Sincerely,
Ankit Baid.

Graduate Student
Department of Bio-Medical Engineering
University of Southern California