Keeping the right temperature during the fermentation is essential to the performance of your yeast. Imagine being able to just glance over at your fermenter and instantly know what temp it’s sitting at. With the Fermometer you get just that! It is a liquid crystal thermometer that adheres to the side of a carboy, bucket, or even stainless conical to tell you the fermentation temperature. (Fahrenheit only, not available in Celsius.)
What makes it a favorite among homebrewers is it gives you a more precise scale of 44–86°F, which the cheaper generic brands do not. It also has suggested Lager and Ale temperature ranges printed right on it. An example of the more precise scale would be that on this unit it’s easy to tell 1 degree of difference, say between 72° and 73° degrees. The more generic units can sometimes jump as much as 4° degrees.
Savvy homebrewers know that even 1 degree of temperature difference can have a big affect on the final flavor of their beer. And even if you don't yet have control over temperature, it is still helpful to know the exact fermentation temperature and to log it in your records.