Thru-beam sensor BB10-P-F1/25/33/35/103/115-7m, Miniature photoelectric sensor with plug-in style housing for mounting in 13 mm hole, Thru-Beam Sensors, Single-beam miniature photoelectric sensor, ideal for installing in frames or contours, Integrated circuit, Plug-in style housing for 13 mm hole, Narrow opening angle, suitable for mounting in pairs, Various frequencies for avoiding mutual interference (cross-talk immunity), Light on version, Increased noise immunity 100 V/m