When measured fluid flowing, the magnet body linked with the floater produces the corresponding displacement, making the Hall probe export the corresponding changing electric signal.
当被测流体流动时，与浮子相联结的磁体产生相应位移，使霍尔探头输出相应变化的电信号。
2
Conclusion is made that calculation and test of the attraction force is key important in the probe design. And some guiding advice is given to the design of the electro-magnet.