O2 Enrichment 

The O2-Enrichment gassing strategy uses a 3-way solenoid valve to select either Air or O2 flow to the sparger. Air is the default gas. O2 is pulsed via the solenoid valve, flowing only when required to maintain the dissolved oxygen (DO) setpoint. Air is not provided at this time. A flow meter visually indicates and sets the Sparger flow rate.  The O2 can be switched from auto control to manual addition. A mass flow controller can be integrated to measure and control the total gas flow range via manual adjustment or automatically in conjunction with the DO controller.

• Gas mixing of Air and O₂ via solenoid valve
• Integrated Rotameter with manual control valve for gas flow control
• Optional Mass Flow Controller for Total flow
• Foaming may be reduced due to O₂ addition capability
• Also applicable to sheer stress sensitive cells and filamentous organisms