| 摘要 |
PURPOSE: A magnetic force closing water gauge for preventing unexpected manipulation is provided to inform the measurement disturbance by the external magnetic force. CONSTITUTION: A magnetic force closing water gauge for preventing unexpected manipulation comprises an impeller(10), a permanent magnet(20), an impeller receiving part(30), a cover unit(40) and a sensor unit. The impeller revolves with the flow of the flow rate. The permanent magnet is attached at the upper part of impeller. The permanent magnet revolves with impeller. The impeller receiving part accepts the impeller to inside. The top of the impeller receiving part is covered with cover unit. The sensor unit senses the rotation of the permanent magnet.
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