High-speed, High-accuracy CCD Laser Displacement Sensor

LK-G3000 series

Catalogues View Catalogue

Sensor Head: Long Distance, Wide beam LK-G157

LK-G157 - Sensor Head: Long Distance, Wide beam

  • CE Marking




Reference distance

Diffused reflection: 150 mm, Specular reflection: 147.5 mm

Measuring range

Diffused reflection: ±40 mm, Specular reflection: ±39 mm*1*2

Light source


Red semiconductor laser


655 nm (visible light)

Laser Class

Class II (FDA CDRH 21CFR Part 1040.10), Class 2 (IEC60825-1)


0.95 mW

Spot diameter (at reference distance)

Approx. 120 x 1,700 µm


±0.05 % of F.S. (F.S.= ±40 mm)*3


0.5 µm*4*5

Sampling frequency

20 / 50 / 100 / 200 / 500 / 1000 µs (Selectable from 6 levels)

LED display

Near the centre of the measurement: Green lights
Within the measurement area: Orange lights
Outside the measurement area: Orange flashing

Temperature characteristics

0.01 % of F.S./°C (F.S.= ±40 mm)

Environmental resistance

Enclosure rating

IP67 (IEC60529)

Ambient light

Incandescent lamp or Fluorescent lamp: 5,000 lux max.

Ambient temperature

0 to +50 °C

Relative humidity

35 to 85 % RH (No condensation)

Vibration resistance

10 to 55 Hz, Double amplitude 1.5 mm, 2 hours in each of the X, Y, and Z directions


Aluminium die-cast


Approx. 290 g (including the cable)

*1 The range is obtained by measuring KEYENCE's standard target (ceramic).
*2 When the sampling rate is 20 µs, the range becomes -22 (NEAR side) to -40 mm (NEAR side) for diffuse reflection, and -22 (NEAR side) to -39 mm (NEAR side) for specular reflection.
*3 The range is obtained by measuring KEYENCE's standard target (ceramic) with the Standard mode.
*4 Consult your nearest KEYENCE representative for the Class IIIa type with increased repeatability.
*5 The range is obtained by measuring KEYENCE's standard (SUS) with 4,096 times of averaging at the reference distance.

Other Models