Allen-Bradley 42CA-U2MPB-A2 Photoelectric Sensor,Retroreflective,4.8-4.8 m Sensing Range,Light Operate - Dark Operate Complementary Output,PNP Output,Cable,42CA.
Bulletin 42CA 18 mm Plastic Cylindrical General Purpose Sensors are ideal for light- to medium-duty industrial applications. These sensors flash an indicator if the signal level is too close to the detection threshold. This helps you align the sensor and warns against detection of a background or degradation of the application characteristics.