SS Brewtech Stick On Thermometer
Stick the thermometer on the fermenter or brew bucket while it is still warm. This helps it to stick better. As the chill advances you will see the numbers appear so as to gauge the temperature the wort has reached. If you are in a room where the temperature is higher than 76°F or 24°C it will display only black.
The gauge will give accurate temperatures from 2° to 24°C or 36° to 76°F