Our goal is to cut down on oxygen waste in the medical industry. We require oxygen for breathing. not breathing out. Thus, we used a pressure sensor to keep track of the pressure generated during inhalation and exhalation. Positive and negative pressure are produced during inhalation and exhalation, respectively. Therefore, the pressure sensor only allows the oxygen to flow when it detects negative pressure, and it closes the circuit (tube) when it detects positive pressure. In our work, we also used a Spo2 sensor to track the oxygen saturation level of the patient. If the patient's oxygen saturation level is greater than 98%, the flow is switched between positive and negative pressure by activating the pressure sensor. The oxygen flow is constant and the pressure sensor is not worked while the patient's oxygen saturation level is less than 98%. The patient needs additional oxygen to survive because their oxygen level is so low.