In-line Oxygenation system. In this photo is is connected directly to the wort chiller in the reverse of the direction it is normally used because it is being cleaned with the chiller. Normally wort leaves the chiller by the port shown here, flows through a hose and enters the oxygenation device at the end at the right in this photo. The oxygen enters through the blue hose and the oxygenated wort flows out at the left in the picture which is connected directly to the fermenter. 0.5 LPM O2 with 2 GPM wort flow calculates out to almost 80 mg/L and results in about 20 mg/L in wort of 15 °P