An Oxygen Flowmeter;

A tiny gadget called a oxygen flow meter indicates how quickly oxygen is leaving a tank or machine.It ensures that the individual receives just the proper amount of oxygen,A knob to adjust the oxygen levels, The oxygen flow rate is indicated by a scale or numbers (in liters per minute, such as 1, 2, 5, etc.).The oxygen is delivered to the mask or nose tube via a tube.It maintains the flow of oxygen safely and at the appropriate level for respiration.