[hvalentim]

There's a saying about the precision of location technology which goes along something like "if you own one GPS you are sure to know where you are, if you have two you start having doubts and if you try to use three then you are lost".

I guess the same is valid for them temp./hum. sensors. The more you use, the less certain you are about the exact values...

As for the SHT31D Board, it does look like excellent value for money.