[Code of Federal Regulations] [Title 21, Volume 8] [Revised as of April 1, 2002] From the U.S. Government Printing Office via GPO Access [CITE: 21CFR870.1450] [Page 298] TITLE 21--FOOD AND DRUGS CHAPTER I--FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) PART 870--CARDIOVASCULAR DEVICES--Table of Contents Subpart B--Cardiovascular Diagnostic Devices Sec. 870.1450 Densitometer. (a) Identification. A densitometer is a device used to measure the transmission of light through an indicator in a sample of blood. (b) Classification. Class II (performance standards).