StacksVerified U.S. regulatory reference

21 CFR §880.2920

Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
  1. (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.
  2. (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 § 880.9.