Stadler Form Selina Black

I don't think it's usable because of its inaccuracy. This has been tested against a calibrated meter. Incidentally, the deviation is outside the spec's.

I had ordered 2 pieces of this hygrometer for 2 different rooms. After setting up, I placed them side by side in the same room for a few hours to see if they would indicate the same. Not so. There is about a 5% difference in the indication of the humidity. So the question is which one is correct. My conclusion is that this device is not very reliable and then I think 35 euros is really too much money.

Nice design, the measurement is quite accurate, but very slow, both for temperature and humidity. (at least 10-15 minutes for correct values) I bought two and only after this time they are both identical! The supplied batteries are already half empty after one day!!! luckily there is an extra battery in it. All in all good, but price-quality is still at the maximum price.