Great Dial Thermometer Gives Temperatures In Both Fahrenheit (0 To 220 F.) And Celsius (-17 To 104 C.) Ideal For Keeping Track Of Your Brewing Temperatures. Use It To Track Your Mash Temperature, Check Your Temperature When Boiling Malt Extract, Or To Bring Sparge Water To The Correct Temperature. The Wide Dial Face Is Easy To Read So You Can Take Readings With A Glance.  The Probe Stem Measures 12 Inches Long. This Dial Thermometer Easily Attaches To The Rim Of Any Brew Pot With A Handy Clip. You Can Keep As Much Of The Probe In The Liquid As You Like By Adjusting The Clip. The Clip Also Keeps The Probe Out Of The Way While You Brew.