Acoustic Sensor for Nitrox Gas Analysis and Monitoring

Current practice in both sport and commercial diving promotes the use of oxygen enriched air ´Nitrox´ to reduce risk of decompression injuries. Most gas analyzers used to prepare and monitor these gas concentrations utilize electrogalvanic (EG) cells which require repeated calibration, are highly moisture sensitive and have a limited lifespan. Here we report the design, construction, and evaluation of a new sensor based on the acoustic properties of different Nitrox mixtures. This sensor has no consumable chemicals, works well in all humidity levels and responds more quickly than EG cells.