Easy to operate, extremely accurate and stable, the Nuvair Pro O2 unit is preferred by commercial, military, technical, and advanced recreational divers using Nitrox. Our water and impact resistant case is designed for everyday use in the marine environment. To change the battery or Sensor, simply unscrew 4 screws and you have easy access to these user changeable components. The Pro O2 analyzer can be placed in line with your compressor during gas production or as a standalone unit testing and individual scuba tank or storage cylinders of Nitrox. We offer a wide range of accessories for adapting to compressors and diver (buoyancy compensator) BC power inflators.