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Tue Oct 23 2018

Photoelectric sensors

  • Photoelectric sensors

Photoelectric sensors – more solutions more advantages

Photoelectric sensors use visible or infrared light to detect many different objects, regardless of their quality and consistency. Unlike inductive or capacitive sensors, they cover larger measuring ranges.

The most common tasks are positioning, counting, sorting and classifying. They are mostly applied in the automotive industry, machine-building, assembly lines, storage and transport systems.

Photoelectric sensors operate on the principle of emitting and receiving light. A diod emits light which is either cut off or reflected by an object and the detection event is subsequently processed.

Photoelectric sensors are available as opposed mode, retroreflective mode, diffuse mode or fiber-optic systems.

Diffuse mode sensors detect the light beam reflected by an object. The sensing range of these sensors depends largely on the reflectivity factor of the object.

A retroreflective sensor, contains emitter and receiver in the same housing. A light beam is established between emitter, reflector and receiver. If an object cuts off the beam, the sensor reacts.

Opposed mode sensors operate similarly. Unlike retrorefl ective sensors, emitter and receiver are separate units covering greater sensing ranges.

Optic fibers made of glass or plastic pipe the light beam from the sensor to the object and back. Fiber optics are especially suited for confined spaces or demanding environmental conditions.

Whether standard or programmable multifunctional versions, compact devices or devices with external amplifier etc., each sensor has special features suited for different applications. TURCK not only offers the most comprehensive product range of photoelectric sensors and fiber optic systems, you also get individual service and support to find the optimal solution for your application.