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          CCD Laser Displacement SensorLK series

          Sensor Head


          [Discontinued model]

          This model has been discontinued.

          Compliance with the certification standard is ensured as of the time of shipment from our company.

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          Sensor head Standard Sensor head

          Reference distance

          80 mm 3.15"

          Measuring range

          ±15 mm ±0.59"

          Light source


          Visible red semiconductor laser


          670 nm


          0.95 mW


          FDA (CDRH) 21CFR Part 1040.10

          Class 2 Laser Product

          IEC 60825-1

          Spot diameter (at standard distance)

          Approx. 70 x
          1100 µm
          0.02756 x 0.0433"


          ±0.1% of F.S. *1


          3 µm *2 0.000119"

          Analog output

          Voltage output

          ±5 V
          (3 µm 0.000119"/mV) *3


          100 Ω

          Current output

          4 to 20 mA (Applicable load: 350 Ωmax.)

          Alarm output

          NPN: 100 mA max. (40 V max.) (N.C.), Residual voltage: 1 V max.

          Sampling cycle

          1,024 µs

          Other functions

          Auto-zero, analog output holding when an alarm occurs, gain switching, response switching, span and shift adjustment of mirror surface measurement mode, changing the sampling cycle

          Temperature characteristics

          0.01% of F.S./°C


          Power voltage

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

          Maximum current consumption

          400 mA max.

          Environmental resistance

          Enclosure rating


          Ambient light

          Incandescent or fl uorescent lamp: 10,000 lux max.

          Ambient temperature

          0 to +50 °C 32 to 122 °F (No condensation)

          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


          Aluminum die-cast


          Approx. 385 g (including cable)

          *1 Linearity was obtained using KEYENCE's standard target (Zirconia block gauge: LK-031/036, LK-081/086, LK-011, White ceramic block gauge: LK-503).
          *2 Repeatability was obtained using KEYENCE's analog sensor controller (RD-50) with the number of averaging measurements set to 64.
          Note: The ripple of the analog output may be 1 mV or more due to common mode noise when observed with an oscilloscope or a high-speed A/D conversion board.
          *3 When measurement is impossible, 12 V (31.2 mA) is output.

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          IL 60143, U.S.A.
          Phone: 1-888-KEYENCE [1-888-539-3623]
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          Measurement Sensors