The Divex G11-4 Hyperbaric Analyser measures partial pressure of oxygen and is designed for internal diving chamber, bell or other hyperbaric use. The Divex G21-2 monitors oxygen levels ranging from 0.00 to 19.99% and 00.0 to 100%. The Divex G22 Oxygen Analyser is a rack mounted instrument which provides continuous digital display of oxygen concentration in the gas sample presented to the surface of the sensor unit. The Divex G30 is extremely popular with commercial diving contractors worldwide as it is designed for monitoring carbon dioxide levels in diving decompression chambers. This rack mounted analyser provides a constant display of parts per million CO2 within 2% accuracy.