§868.1640. Helium gas analyzer.
21 C.F.R. § 868.1640
Identification. A helium gas analyzer is a device intended to measure the concentration of helium in a gas mixture during pulmonary function testing. The device may use techniques such as thermal conductivity, gas chromatography, or mass spectrometry.
Classification. Class II (performance standards).
Notes, amendments, and revision history
Authority
Authority: 21 U.S.C. 351, 360, 360c, 360e, 360j, 360 l, 371.
Source
Source: 47 FR 31142, July 16, 1982, unless otherwise noted.