Omron E3FA plastic body and E3FB metal body photoelectric sensors come in through-beam versions with ranges up to 20m, retro-reflective versions with ranges from 0.1 to 4m and coaxial retro-reflective versions with ranges up to 500mm; 3 models of diffuse-reflective sensors with ranges of 100mm, 300mm and 1m also are available. The sensors use high-power LED light sources for alignment and to minimize the effects of dirt. They have shielding for  electromagnetic noise immunity and impact-resistant bodies that are fully sealed against liquid and dust ingress.

 Omron Automation and Safety; 866-88-OMRON; www.omron247.com