OENO2 is a system that enables the micro/macro-oxygenation of wine in tanks by measuring the actual oxygen supply in mg/s. It does not require particularly high inlet pressure, and it functions by making up for any variations in pressure at the outlet (regardless of the inlet pressure) so as to maintain a constant oxygen supply throughout the distribution period. It is equipped with an efficient self-diagnostic system and specific safety systems, thus ensuring that distribution stops immediately in case of malfunction