Panasonic ex33pn adjustable photoelectric sensor through beam light on dark on panasonic ex33pn a through beam type photoelectric sensor with adjustable sensitivity and light on dark on operating modes detection range is 800mm and the sensor has an equivalent fast response time to that of fiber sensors making it ideal for applications where there are requirements to sense small objects or where there are fast moving objects panasonic ex33pn threaded miniature photoelectric sensor with switc