Checking the temperature of your fermentation has never been easier. Stick to the middle of your bucket, tank, or other container and at a quick glance, you can check the temperature. Liquid crystal thermometer with waterproof adhesive easily sticks to plastic, glass, or metal. Everyone knows, oxygen is your enemy with winemaking, so with this, there is no need to open your container to take temp readings on the fly. The Temperature scale reads from 64 – 93°F (18 – 34°C).