Oxygen monitor and control system for US navy deep diving system MK2 MOD 1

Until recently, the limiting parameter in the design of hyperbaric life support systems has been the method of oxygen partial pressure control. This paper describes in detail a control system incorporating a new oxygen sensor especially designed for prolonged exposure to high pressures followed by rapid decompression. The electronics control system incorporates triple redundant oxygen level measurement, output limiting, and system disabling in the event of malfunction. In addition, a sampled data control system for controlling oxygen levels in small volumes, such as a closed cycle diver rebreather, is discussed.