Laser gauge

LG series

This model has been discontinued.

Recommended Replaceable Products: CMOS Multi-Function Analog Laser Sensor - IL series

Main Unit LG-81

LG-81 - Main Unit




Reference distance

80 mm3.15"

Measurement range

±20 mm0.787"

Light source


Red semiconductor laser


670 nm (visible light), Class 2

Control output

1.4 mW maximum (0.24 mW average)

Spot diameter

1 × 2 mm0.039" × 0.079"*1

Indication system

±0.1 mm±0.004" or less (with white mat paper)

Display resolution

0.1 mm 0.004"*2

Display range

-99.9 to +99.9

Display speed

40 times/ms, 80 times/ms, 160 times/ms, 640 times/ms*3

Display power

2-color, 7-segment LED (character height: 10 mm0.394")

Control input

Timing input

NPN open-collector or non-voltage contact signal

Auto-zero input

Tolerance selector input

Control output

100 mA max. (40 V max.) Residual voltage: 1 V max.

Control output

Alarm output

Maximum NPN open-collector output: 100 mA (40 V or less), residual voltage: 1 V or less (N.C.)

Response time

10 ms minimum (switchable between 4 levels)

Temperature characteristics

0.03% of F.S./°C

Main functions

Auto zero, scaling, tolerance memory


Power voltage

12 VDC ±10 %, Ripple (P-P) 10 % or less

Current consumption

200 mA or less

Environmental resistance

Ambient light

Incandescent lamp or Fluorescent lamp: 2,500 lux or less

Ambient temperature

0 to +40 °C 32 to 104 °F

Relative humidity

35 to 85 % RH (No condensation)

Vibration resistance

10 to 55 Hz, Double amplitude 1.5 mm 0.06", 2 hours in each of the X, Y, and Z directions

Case material

Glass reinforced plastic


Approx. 300 g (including 2-m 6.6' cable)

*1 At the reference distance
*2 With white mat paper at the reference distance
*3 This varies according to the set number of averaging measurements.

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