H-B DURAC Maximum Registering/Autoclave Bi-Metal Thermometer; -20 to 150C (0 to 300F), Individual Calibration Report (B60215-0000) 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 individual calibration report (calibration point 121C), traceable to NIST and multi-language (English, French, German, Italian, Portuguese and Spanish) instructions Range: -20/150C (0/300F), Accuracy:  1.5C ( 3F), Divisions: 2C (5F), Dial Size: 81mm (3 "), Overall Length: 69mm (2 ")