Fermometers are precision liquid crystal thermometers with adhesive backing used to get accurate temperature readings. Celcius and Fahrenheit scales. Fermometers allow you to conveniently monitor pitching and fermentation temperatures without needing to sanitize equipment and expose your homebrew to open air. Fermometers are accurate, self-adhering, water resistant, easy to use, and sanitary. Simply attach to the side of any carboy or fermenting bucket. The temperature will be highlighted in color which can be easily read at a quick glance.