Light barrier

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Through-beam sensor FE 88-R-NAV-L5

Scanning range 30 m (DC) or 65 m (AD/DC)
Red light 660 nm
Complementary switching outputs (DC)
Time functions (AC)
N.O./N.C. selectable
Voltage: 10 ... 30 V DC
Switching frequency: 1000 Hz

Transmitter and receiver of through-beam sensors are separate. This means that the emitted light has to travel the distance between transmitter and receiver only once. Therefore they are called through-beam sensors.These types can reach very large scanning ranges.
For the use of through-beam sensors, their sensing range is essential. In case of very critical ambience conditions, as strong formations of dust or steam, it is important to pay attention that the sensors cannot be run at their sensing range limits. Attenuation may result, which reduces the sensing range.
The sensing range listed in the data sheet should not be exceeded, in order to guarantee functionality even in bad operating conditions. If corner mirrors are used, the total distance to be monitored should be within the indicated sensing range.
A special feature of the one-way sensors is the FLS/FLE 18 laser sensor. In this version, the sensor is equipped with special focussing optics. This makes it possible to alter the diameter of the light spot. The scanning distance of this sensor is max. 50 m.The light spot can be reduced to a diameter of 0.03 mm. As a result it is possible to reliably detect even the smallest objects at a greater distance.

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