Hi everyone.
I have an Oregon Scientific RMS600 station with two THGN132N external sensors (one indoor and one outdoor). Few days ago temperatures started dropping below -10 Celsius and I noticed that the reported dew point went to 0.0. Also the RH went flat to the last know value for T>-10C.
So the question is that if there is any sensors (compatible with my station) that still measures RH below -10C (14F). Maybe the THGN123N (Ultra Cold Temperature) or THGR122NX?