Panasonic ex 20 series ultra compact photoelectric sensors panasonic ex29bpn an ultra compact photoelectric sensor with a 30 to 200mmmm sensing range this side sensing sensor is of the retroreflective type and has a built in amplifier mountable using m3 fixings and has a good basic performance with a clear beam spot from a red led light source the sensor has an ip67 protection rating and with its mounting design is suitable for a range of detection and sensing applications including fo