MoreBeer has picked up Blichmann’s New Oxygen Flow Regulator. It is an O2 regulator with a built in flow meter.
About, from MoreBeer:
“Most oxygen regulators only regulate pressure but the new Blichmann Oxygen Flow Regulator measures the liters of oxygen per minute so you can dissolve the perfect amount of oxygen into your wort. It is important to know the flow of oxygen because depending on your downstream restriction the actual flow can vary a lot.
Measuring your dissolved oxygen usually would run you $300 or more but with the Oxygen Flow Regulator you can know exactly how much oxygen was put into your wort for less than $50.”
This is also available as a part of Blichmann’s Inline Oxygenation Kit. This is a newer product that sold out after being announced. As of this posting, the Blichmann Oxygen Flow Regulator is back in stock and selling for $45. Shipping is free to most US addresses with a $59 order. Check the product page for up to the minute price and availability.
Oxygenation and Aeration Supplies at William’s Brewing