Atica 3 is a flowmeter bank is designed with advanced technology which is used for supplying gases with different dosage units mainly for anesthesia. It is also capable of mixing oxygen, nitrous oxide and air which is delivered by the instrument. The gas selector knob allows the selection of gases which is to be delivered by the device that can be oxygen with nitrous oxide or oxygen with air. If there is any failure of supplying oxygen the automatic cut-off system presented in the device stop delivering nitrous oxide. The anti-hypoxic system with latest technology are capable of efficiently regulate the flow of nitrous oxide automatically which does not allow the oxygen supply to fall below 27% ± 2%. When the mixture of oxygen and nitrous oxide is delivered then only the anti-hypoxic system can be effective.