So much for the background, now I refer to the product itself. After initial start-up I put all three devices side by side. An hour later, all three devices showed the same temperature. When humidity is a device wich slightly (2%) of the other devices from that but within the tolerance range of the device is (tolerance range: +/- 1 ° C; +/- 5% relative humidity). After that, I distributed the equipment to the room.
For fixing as mentioned are a hook, a magnet and a stand available. I really only use the latter, however, have the other options tested and find it quite satisfactory. The denounced by many to weak magnet is indeed for smooth surfaces (hygrometer slips due to its own weight down) really too weak, but he adheres without problems on rough surfaces.
Were also often criticized the lack of smileys. The Smileys actually missing when one is in a range of optimum humidity, you approach but the negative (too wet / dry) first a warning smiley [: O] and then a negative Smiley [:-(].
The reaction time is faster than expected. Shortly after the opening of the window changes the display. Lengthy temperature / humidity adjustments, as described in some reviews, I could not watch.
In conclusion remains to be said: The TFA 30.5014.02 is a first class product at an affordable price. For problems with the humidity can I absolutely recommend the device. For scientific investigations it may not be suitable, but it was probably not even built.
