Detection of objects at a great distance – through beam sensors have the longest ranges.
Monitoring of doors and entrances
Due to the good repeatability throughout the entire range, positioning of objects
Reliable detection of high-gloss objects such as mirrors, wafers or chrome-plated surfaces
An emitter in a separate housing transmits the light to a separate receiver. The object is detected when it breaks the emitted beam.
Characteristics and advantage
Due to the separated configuration, long ranges with large signal excess gain can be achieved in comparison with equivalent retro-reflective systems.
Through beam sensors are therefore most suitable for operation in unfavorable ambient conditions such as dirt, dust and moisture.
The clearly defined, consistent active zone permits highly constant repeatability throughout the entire sensing distance.
The switching point is independent of the surface properties of the object.
Technology and operation
The emitter and receiver must be aimed at each other. The narrower the angle of radiation and reception, the more accurately this must be conducted.