| 摘要 |
<p>PURPOSE:To confirm the sensitivity level when a level of an amplification factor is adjusted in the detection switch device adjusting the sensitivity level through the operation of an amplification factor level adjustment pushbutton switch of an amplifier circuit. CONSTITUTION:The switch device is provided with an amplifier circuit 5 amplifying a detection signal outputted from a light receiving circuit 6, a mode changeover switch SW 1 comparing a level of the amplified detection signal with a discrimination level to provide an output of the presence of an object to be detected via an output circuit 7 thereby selecting a detection mode of the object to be detected or the sensitivity level adjustment mode, an amplification factor level adjustment pushbutton switch SW 2 of the amplifier circuit 5 and a sensitivity level display light LED 2 displaying the sensitivity level corresponding to the amplification factor level of the amplifier circuit 5.</p> |
