Reimers Systems Inc. (RSI) was founded to provide high quality hardware solutions for man-rated hyperbaric and hypobaric applications with special emphasis on medical hyperbaric applications. Besides hyperbaric/hypobaric equipment RSI has also been industry leader for providing the breathing simulators used for performance testing of various life support equipment. Included in RSI were most of the key personnel of its predecessor company, Reimers Engineering, Inc (REI)