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A '''thermometer''' is used at several stages in the [[Processes|brewing process]] to monitor the temperature of the mash, [[wort]] and even finished beer. The most popular thermometer for brewing is a simple floating thermometer which has a temperature range of 0-100 C, and is typically marked in both Farhenheit and Centigrade scales. When purchasing a thermometer, be sure to get one that has a range that at least spans from room temperature to boiling. Some more advanced brewing systems incorporate electronic thermometers which have a probe and separate digital readout.