An oxygen tank regulator will allow for control of the flow from the oxygen tank. These regulators are pediatric to allow for full range on the ozone generators by going down to slow flow rates. The flow of the oxygen regulator is measured by Liters Per Minute (LPM). Ex. 1 LPM means the oxygen tank will be dispensing 1 liter of oxygen every minute. An ozone generator needs slow flow rates such as 1/4 or 1/8 LPM for full functionality.