Health sector is one of the priority areas in the development of indonesia. Health is one of important facktor that is of concert to many people. As well as the medical device. One of the supporting medical devices is infuse pump. The medical device used to provide additional substances in the form of liquid electrolyte into the patient’s body trough an intervenous (IV) tube. Air bubbles censor in IV tube uses optocoupler as air bubble detector. Users simply install this device will start button. The device will start working when air bubble are detected. That condition will make the device immadiatelly turns on the alarm as a sign of air bubbles in the IV tube or infusion starts to run out.