Product review (5 stars): Functional and attractive Climatemeter
The Fischer 146-01 Climatemeter is a simple and effective tool for monitoring the "comfort" of your indoor space. This device has two cross-indicating markers, one for temperature and one for relative humidity. The spot where they cross can show how comfortable the indoor climate is. The narrow "comfort" range is indicated on the dial by a shaded area.

Humidity is as important as temperature for us humans, since we cool ourselves evaporatively (by sweating). The higher the humidity, the less effective our built-in cooling works. Humidity is also important for indoor spaces to protect the living environment. If your indoor humidity is too high you could have issues with mold or mildew growth. If indoor humidity is too low, damage to wood furniture can result as well as chapped hands and lips. This is a very useful tool for monitoring all these conditions.

Apart from its function, the Fischer 146-01 is really a beautiful instrument. It measures 5" across and about 1" deep, and has a nice polished stainless steel finish. This is a precision instrument that does not require batteries and should give a lifetime of accurate service, unlike the cheap digital devices you can get for measuring humidity. Pairing this with a matching 5" barometer would make a very attractive and simple weather station.

Out of the box, this has been quite accurate, matching readings from other weather meters that I have. Please keep in mind that this device is designed to function only when mounted vertically (on a wall). It will not give correct reading when laying flat. There is a small mounting hole near the top of the back of the unit for wall mounting.

I also need to add that Ambient Weather provided me with a sample to review at no cost.