... air/oxygen flow meter 1. control & measure range (L/min) 1-12, 2-20, 3-30,10-60L/min 2. oxygen gas flow 0.5-8LPM portable air flow meter Gas flow meter ... and air, oxygen flow meter are ideal for ... etc. Models in stock: 0.5-8LPM,1-12LPM,2-20LPM ,3-30LPM,10-60LPM,etc. 0.5-8LPM portable air/oxygen flow meter