Title 21

SECTION 868.1640

868.1640 Helium gas analyzer.

§ 868.1640 Helium gas analyzer.

(a) 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.

(b) Classification. Class II (performance standards).

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