The humidity sensor in my Oregon Scientific Weather Station (BAR208HGA) is stuck at 27% in vastly varying conditions. Having declared it dead, I'm looking for a replacement. (Edit: indoor unit; sat on my desk and suffers from old age.)
The white square at the bottom with interlaced traces and a "3" is the humidity sensor. Edit: back side is unmarked. Its legs are connected to 1.5K and 1.5M resistors (by measurement, not color code) above, and then the 1.5K side takes off to an epoxied chip.
Digikey shows 2 pin sensors reporting in pico-farads, and in ohms impedance @ 1KHz. Pricing is ~US$6 (and way up) in 1K quantity. Most are polymer based.
Newark has some MULTICOMP HCZ-H8-B (from Europe) at US$0.63 in 1K quantity. These are Polymer on Alumina substrate. Might mine be a previous generation???
Perhaps what I have is ancient and/or Chinese, so not in the current parts catalogs.
Does anyone want to guess at the specifications for my broken sensor?