| 摘要 |
A proximity sensor with lateral approach of the target. In order to monitor the passage of the target 4 into the axis of the sensor 3, the detection signal is sent to a first comparator 11 which gives a signal indicating the presence of the target in the proximity zone, and the derivative of the detection signal is sent to a second comparator which gives a signal indicating the passage of the target into the axis of the sensor. <IMAGE>
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