A successful homebrew involves vigilant temperature control. But with the right tools, even a home brewing beginner can achieve quality results. Fermentation with beer brewing and wine making best occurs within very specific temperature ranges affecting not only alcohol content, but sugar and pH levels, as well. Falling out of that range can result in off-flavors. Digital probe-style and handheld thermometers take the guesswork out of adjusting fermenter and ambient temperatures so you can brew like a pro.