Harris Argon CO2 Flowmeter Regulator 355-2-Ar-580 3100200
The flow tube and float are easily changed for different gases. The outlet connection is 5/8" - 18" (F). For vertical mounting only. Gas / Gas Service Argon (Carbon Dioxide - CO2). Harris Model 25GX-500-580 HVAC Nitrogen Purging Regulator 3000606.