Distance sensors

The distance sensors are manufactured for a wide range of specifications so that for each application the
suitable sensor is available. The sensors are differentiated by measurement range, light spot diameter and
wavelength characteristics.

There are two different light sources. One is a LASER, the other one is a LED. Both types have specific
advantages, according to the field of application.

By using new components, it was possible to design the sensor to be much more compact and less expensive
than most other optical distance measuring sensors using the triangulation principle.

Comparison LED to LASER sensors

Advantages LED sensors:

-          Higher measuring accuracy at black objects

-          No human eyesight safety considerations

-          Larger light spot enables high integration of scattered surfaces

-          Examination of scratches on surfaces

-          Lower price

Advantages LASER sensors:

-          Shorter response time

-          Smaller light spot to register fine differences in object's structure

-          Better accuracy with striped objects (light / dark transition within the spot)

-          No ambiguous result due to shiny objects on the side of the light beam



The optical triple-range displacement sensors are designed for non contact detection of the presence of objects.
They measure the distance of objects according to the principle of triangulation in the range of 0.5 - 400 mm.
The middle of the measurement range is the reference distance (working distance). The sensor transmits pulsed
light, so the signal is independent to ambient light.

The diffuse reflected light spot is projected to a PSD through a lens. The intensity of the light is adjusted automatically,
according to the reflection factor of the surface. If the intensity of the reflected light is too low and cannot be controlled,
a failure is displayed (i.e. not enough light). Shiny surfaces, which reflect the transmitted light directly into the PSD, will
also lead to error message (i.e. too much light). Both failures are displayed by separate LED's and are available as logical
output signals. A continuously running built-in mechanism guarantees the permanent monitoring of the amount of reflected

The objects to be measured can be made of nearly all materials, for instance metal, plastics, ceramics, rubber and paper.
Only highly reflective objects and liquids should be subject of special consideration. Glass and mirroring surfaces can not
be measured.  


Technical Data LED-Sensors

Measurement range          [mm]            2 - 200
Resolution                        [Ám]          0.5 - 60
Light point diameter          [mm]          0.8 - 10
Light source                                    Infrared-LED
Wave length                      [nm]            900
Working distance              [mm]         24 - 340
Scanning frequency           [kHz]            2.5


Technical Data Laser-Sensors (10 kHz-Types)

Measurement range           [mm]           0.5 - 200
Resolution                         [Ám]            0.1 - 300
Light point diameter           [mm]            0.1 - 4
Laser wave length              [nm]               675
Working distance              [mm]              2 - 680
Scanning frequency           [kHz]               40


Technical Data Laser-Sensors (25 kHz-Types)

Measurement range          [mm]            0.5 - 200
Resolution                        [Ám]             0.1 - 60
Light point diameter          [mm]             0.1 - 4
Laser wave length             [nm]                675
Working distance             [mm]             2 - 340
Scanning frequency          [kHz]               125