{"data":{"id":"us/21-cfr-868.2550","jurisdiction":"us","citation":"21 CFR 868.2550","heading":"Pneumotachometer.","body":"(a) Identification. A pneumotachometer is a device intended for medical purposes that is used to determine gas flow by measuring the pressure differential across a known resistance. The device may use a set of capillaries or a metal screen for the resistive element.\n(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 the limitations in § 868.9.","path":["Title 21—Food and Drugs","CHAPTER I—FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES","SUBCHAPTER H—MEDICAL DEVICES","PART 868—ANESTHESIOLOGY DEVICES","Subpart C—Monitoring Devices"],"source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-25/title-21.xml","current_through":"2026-08-25","vintage":"","retrieved_at":"2026-08-27T02:24:47Z","sha256":"0cb7b16d559ca043b33a4370b4c1f7012c2614a27664498eb730e24c8426547c","source_id":"us-cfr","stale":true,"prev":"us/21-cfr-868.2500","next":"us/21-cfr-868.2600"},"notice":"GroundRules: Original legal text. Not legal advice."}