Pepperl+fuchs Phototalk

The two most common light source types for photoelectric sensors are LED and laser.  Both LEDs and lasers are available in visible red or infrared types.  Additionally, lasers are divided into different classes based on their power and wavelength.  With photoelectric sensors, the advantages of using laser light sources over LED are: --Small, concentrated light spot --Long ranges as compared to LED --High burn-through ability