An electronic respirometer.
D000388:Air; D000669:Amplifiers, Electronic; D001128:Argon; D004582:Electronics, Medical; D005030:Ethylenes; D006371:Helium; D006813:Humidity; D009584:Nitrogen; D010100:Oxygen; D012119:Respiration; D013147:Spirometry / Q000295:instrumentation*; D014159:Transducers
D005030:Ethylenes; D006371:Helium; D001128:Argon; D009584:Nitrogen; D010100:Oxygen