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![Perty diffuse reflection photoelectric switch sensor, three-wire DC, two-wire AC, normally open infrared sensor E3F-DS30C4, three-wire DC NPN normally open. [1]](http://koeedmro.com/cdn/shop/files/Perty_diffuse_reflection_photoelectric_switch_sensor__three_wire_DC__two_wire_AC__normally_open_infrared_sensor_E3F_DS30C4__three_wire_DC_NPN_normally_open___1.webp?v=1790631935&width=533)