CFR › Title 21 › Part 868 › §868.150021 CFR §868.1500Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗Copy link(a)Identification. An enflurane gas analyzer is a device intended to measure the concentration of enflurane anesthetic in a gas mixture.(b)Classification. Class II (performance standards).