Hi, Awhile ago there was a thread on humidity sensors. One of the recommended vendors was Panametrics with their RH2 sensor. This is supposedly a low cost humidity sensor. However, their "sampling" program is to sell me 3 for $100US. This hardly qualifies as low cost or sampling. Does anyone have any other sources for a humidity sensor or better yet a way to build your own? Thanks, Paul K. PS I will be interfacing this to a PIC. So it is not quite OT.