| 摘要 |
<p>The proximity switch has a coil (12) to which a periodic transmission current is supplied. The switch also has a signal processor for processing signals corresponding to the voltages induced in the coil after a current pulse by the current flowing in the body being detected. The coil, the pulse generator and the signal processor are arranged in a cylindrical housing (21) which is attached to the side of the active surface of the sensor. The housing is made of metal which is not ferromagnetic and which has a relatively high specific electrical resistance.</p> |
