[Code of Federal Regulations] [Title 21, Volume 8] [Revised as of April 1, 2003] From the U.S. Government Printing Office via GPO Access [CITE: 21CFR880.2920] [Page 394] TITLE 21--FOOD AND DRUGS CHAPTER I--FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) PART 880--GENERAL HOSPITAL AND PERSONAL USE DEVICES--Table of Contents Subpart C--General Hospital and Personal Use Monitoring Devices Sec. 880.2920 Clinical mercury thermometer. (a) Identification. A clinical mercury thermometer is a device used to measure oral, rectal, or axillary (armpit) body temperature using the thermal expansion of mercury. (b) Classification. Class II (special controls). The device is exempt from the premarket notification procedures in subpart E of part 807 of this chapter subject to Sec. 880.9. [45 FR 69682-69737, Oct. 21, l980, as amended at 63 FR 59228, Nov. 3, 1998]