| 摘要 |
PURPOSE: A water level sensor is provided to apply for a tank built in structure and reduce manufacturing cost by removing a cause of failure of the water level sensor. CONSTITUTION: A stem(200) includes an insertion part(210) fixed and sealed tightly in one side of a tank and has an inner space. The stem is extended to from the insertion part. A printed circuit board is installed inside the stem and has a magnetic sensor sensing magnetic change. A plotter(220) is combined in the stem and has a magnet linearly flowing and generating the change of the magnetic force to the magnetic sensor. |
