Abstract: The present application provides a system for measuring and storing data in an external device including a collection unit transferring fluid, a sensing unit connected to the collection unit for sensing the pressure of the fluid and converting the pressure into data, a housing assembly for housing the sensing unit, and a communication unit connected to the housing assembly receiving the data from the sensing unit and transmitting the data to the external device. The system provides a communication device for transmitting a signal to the external device having a plurality of buttons, each button corresponding to a condition, a light indicating operation of a button, and an electronic circuitry detecting the operation of the button, identifying the operation of the button as the signal, and transmitting the signal to an external device. The present application further provides a method for measuring data using the above-described system.