Laser Displacement Transducer - HLAS

HLAS laser sensors cover a measurement range from 30 to 800 mm. The internal micro controller gives a precise output signal, which is proportional to the distance to be measured. No external electronic device is needed. An intelligent on board signal conditioning unit enables the sensor to measure accurate on different target colors and surfaces.

This visible laser spot allows an easy adjustment of the sensor. On request, the laser beam can be widened up to a fine line. This enables averaging of received signal when target surfaces are rough.

The triangulation principle: The laser beam hits the target as a small spot. The position of this spot is detected by the receiver. In general, the sensor is measuring the angle and is calculating the distance to the target.



Laser Beam Types

Spot laser: The object is detected by a precise focused laser beam. This is the most popular type for HLAS applications.

Line laser: The object is detected by a fine laser line. Typically used for thickness- and position measurement on rough, porous surfaces.

Technical data 



30...50 mm 30...130 mm 50...250 mm 100...500 mm 200...1000 mm


0.01 mm 0.06 mm 0.3 mm 0.5 mm 3 mm


+/- 0.03 mm +/- 0.2 mm +/- 0.9 mm +/- 1.5 mm +/- 10 mm

Response time

< 10 ms < 10 ms < 10 ms < 10 ms < 12 ms

Sensing element

Photo diode array

Alarm output

PNP, switching current 100 mA


Power - LED green, Alarm - LED red, Pollution - LED red flashing


12...28 VDC, max. current < 120 mA

Light source

Laser diode, red, pulsed, class 2, wave length 675 nm

Electric protection

Reverse polarity and short cut protect

Housing material

Aluminum milled


IP 67


0...+50 0C


Beam types

Laser spot

0.2...1.0 mm

1.0...2.0 mm

2.0 mm

2.0 mm

2.0 mm

Beam height

3.5...4.0 mm

3.5...6.3 mm

4.5...9.5 mm

5.5...16.5 mm


Beam width

1 mm


1 mm


1 mm


1 mm





Output signal

4...20 mA

RS 485

Standard 19200 baud rate, 1 start bit, 1 stop bit, 8-bit data length, no parity, half duplex