Evolution Satellite Conserver (Electronic Oxygen Conserver)Unit : Each Overview The Evolution is an electronic oxygen conserver which is lightweight, compact and delivers a uniform oxygen pulse in seven increments preset at 2 lpm. Featuring a high sensitivity and a long battery life, the Evolution can affordably treat a broad range of patients for longer. Product Features The OM 950 model has a PIN index fitting requiring a 50 Psi input Offering a 5: 1 saving ratio, reducing the frequency of refills, cylinder