Been here, done that. As I continue to observe the relatively new SHT31 at work, I have come to realize that in extreme dryness (less than 4% ASOS wise) the 31 tends to go a little overboard with drying things out as I've had many 1% obs today. Granted, still basically within parameters, it gets a little flaky and bottoms out causing me to be flagged by Mesowest (dewpoint). I get that
all humidity sensors have difficulty with the very high and very low, so not going to mail in the 31, just yet. Frankly, I'd rather it show the capability of going low, whereas other sensors would never even come close to displaying this. I may put in my other 31 in eventually to see how it does in the bone dry as well.
It would be very interesting to see how the 35 would handle this........