The oxygen quantity indicator shows the remaining oxygen supply in litres. If only a small amount of oxygen is left, the OXY LOW warning light of the caution panel will light up. The oxygen quantity indicator is located at the right aux. console.
The model was created in Blender 2.79 for the Cycles engine, the textures and materials are PBR based. The model has been rigged with a simple Empty for easy animation.
I tried to keep all the materials packed within the .blend but if for some reason it is not here, you can find them on the Texture folder in the .zip file that accompanies this panel or if you still require it, don't hesitate in contacting me.