A new system that guarantees an uninterrupted distribution of oxygen thanks to the exchange of the tanks, when one of them is empty. The Self Switch exchange was purposely designed and made to offer a perfect solution every time you need to distribute oxygen without any interruption and in a safe way. The special internal mechanisms guarantee the priority of the first and the second tank, to be sure that the tank in use is completely empty. In order to guarantee the distribution in case either of the two mechanisms do not work, there are two manual valves, that permit you select one of the tanks and obtain the distribution of oxygen. Two analogical displays show which tank is in function. The Self Switch exchanger is predisposed to include two pressure switches, that can be connected to a luminous and/or acoustic source; these will advise which tank is in function or activate an alarm system. The extraordinary performance even more interesting today because Self Switch is the only one-piece exchanger on the market powered by the same gas, the delivery of which it is responsible for. Thanks to the characteristic of having an autonomous function and for not needing an electrical supply, it can also be used in rescue vehicles every time you need a safe oxygen distribution with no interruption.