| 摘要 |
PURPOSE: A system for sensing and notifying of residual amount of Ringer' solution is provided to signal time for changing Ringer's solution with buzz by use of an independent circuit. CONSTITUTION: The system for sensing and notifying of residual amount of Ringer's solution includes a hook(9), a spring(8), a cam shaft(7), a limit switch(13), a horizontal axis(1), a female socket(2), a vertical axis(3), a buzzer(4), a switch(5), an electric bulb(6), a hose for injecting Ringer's solution(12), and a battery(16). When a new Ringer's solution bag is hung on the hook(9), the spring is compressed or expands by the weight of the Ringer's solution(14). Then, the cam shaft(7) connected to the axis of the hook goes down or up and, thereby, connects or disconnects circuit of the limit switch(13) to notify of and control the residual amount of Ringer's solution by the central controlled room or independently.
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