The SM123 sensor series includes the SM1 ultra-miniature fixed focus; presence detectors SM2 with scattered light, as well as version SM3 with polarizing optics, reflector reflection and through beam.
The SM123 sensor series includes the SM1 proximity models with 20mm fixed focus; proximity sensors SM2 with a flat scattered light of 170 mm and a through beam of 1.2 m; SM3 version with coaxial polarizing optics, 50 cm reflector and 1.2 m through beam.