Datasensor SM123 series offers a complete line of subminiature amplified photoelectric sensors, ideal for mounting in reduced spaces or in presence of particular mechanical obstacles. The extremely compact dimensions do not limit the detection performances, that suit most of the applications on automatic machinery for packaging, assembling, printing and so on, such as in automatic distribution and vending machines. Datalogic SM1 models are 20 mm fixed focus proximity that, thanks to the thin housing with side optics, represent a valid alternative to fiber-optic systems. The SM2 models present instead an ultra-flat format with a thickness inferior to 5 mm and offer a 170 mm diffuse proximity, as well as a through beam with an operating distance reaching 1.2 m. The SM3 models also present a thin housing with lateral optics, but offer a 50 cm coaxial polarised retroreflex or a 1.2 m through beam optic function. All the subminiature sensors of the SM123 series have visibile red emission and are available in the NPN or PNP versions, both with 3 wires 2 m cable connection. The plastic ABS housing guarantees an IP67 protection degree.