H-B Instrument B61315-0000 Maximum Registering Autoclavable Bi-Metal Thermometer, 0 to 300F (-20 to 150C) Constructed from durable 304 stainless steel with a glass lens, withstands pressure, autoclave cycles, high temperatures and rust Mercury free, waterproof, with removable protective silicone sleeve to prevent moisture from making contact with the dial Threaded connection (1/4" NPT) screws directly into in-line processes, or can be used to mount on included stand Includes multi-language (English, French, German, Italian, Portuguese and Spanish) instructions and Statement of Test and Calibration traceable to NIST Range: -20/150C (0/300F), Accuracy:  1.5C ( 3F), Divisions: 2C (5F), Dial Size: 81mm (3 "), Overall Length: 69mm (2 ")