Oxygen Regulator

There are two kinds oxygen regulator wall type and cylinder type,the wall type is like the image without the gauge,and worked with the outlet,the gas was from teh centre gas system;The cylinder type worked with the cylinder and with the gauge,it must adjust the pressure then make the gas used.

And,we can classify the oxygen regulator according the different area,it depends on different adapters,like British standard oxygen regulator,American,French and Germany standard ones.