The EX-10 series ultra-slim Photoelectric Sensor with amplifier built-in. The diffuse reflective type sensor is front sensing and is so thin that it gives an impression of being just pasted on the mounting base. The thru-beam type is available as front sensing type, as well as, side sensing type, allowing flexible mounting. The pitch of installation is 1/2 of conventional models, so that the close-installation is possible. The EX-10 series achieves reductions in power consumption of up to 65%. The sensor is suitable for detecting small and high speed travelling objects.