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Laser Displacement Sensor

ST-M Series Laser Displacement Sensor

0.25 micrometer repeatability 0.05% F.S. linearity Maximum acquisition frequency of 50kHz Multiple industrial interfaces supporting Modbus RTU/Ethernet/analog input

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Key Features

  • • 0.25 micrometer repeatability
  • • 0.05% F.S. linearity
  • • Maximum acquisition frequency of 50kHz
  • • Multiple industrial interfaces supporting Modbus RTU/Ethernet/analog input

Applications

  • • Dimensional inspection
  • • Step height inspection
  • • In-line quality monitoring
  • • Machine control

Specifications

View detailed specifications

ST-M2 Series Laser Displacement Sensor Parameters

ModelReference DistanceMeasurement RangeRepeatabilityLinearity ErrorSampling Frequency

| ----------- | -------: | -------: | ------: | --------: | ----: |

ST-M2-3030 mm±5 mm0.25 μm＜±8 μm5 kHz
ST-M2-30W30 mm±5 mm0.25 μm＜±5 μm5 kHz
ST-M2-5050 mm±10 mm0.4 μm＜±15 μm5 kHz
ST-M2-50W50 mm±10 mm0.4 μm＜±10 μm5 kHz
ST-M2-8585 mm±20 mm0.8 μm<±40 μm5 kHz
ST-M2-85W85 mm±20 mm0.8 μm<±30 μm5 kHz
ST-M2-150150 mm±75 mm2 μm<±150 μm5 kHz
ST-M2-150W150 mm±75 mm2 μm<±113 μm5 kHz
ST-M2-250250 mm±150 mm10 μm<±450 μm5 kHz
ST-M2-250W250 mm±150 mm10 μm<±300 μm5 kHz
ST-M2-400400 mm±200 mm15 μm<±600 μm5 kHz
ST-M2-400W400 mm±200 mm15 μm<±400 μm5 kHz
ST-M2-800800 mm±500 mm45 μm<±2000 μm5 kHz
ST-M2-800W800 mm±500 mm45 μm<±1000 μm5 kHz
ST-M2-30R25.7 mm±5 mm0.25 μm<±5 μm5 kHz
ST-M2-50R46.4 mm±6 mm0.4 μm＜±6 μm5 kHz
ST-M2-85R85 mm±10 mm0.8 μm＜±10 μm5 kHz
ST-M2-30WR25.7 mm±5 mm0.25 μm＜±5 μm5 kHz
ST-M2-50WR46.4 mm±6 mm0.4 μm＜±6 μm5 kHz
ST-M2-85WR85 mm±10 mm0.8 μm＜±10 μm5 kHz
ST-M2-150WR107.5 mm±10.5 mm2 μm＜±16.8 μm5 kHz

ST-M3 Series Laser Displacement Sensor Parameters

ModelReference DistanceMeasurement RangeRepeatabilityLinearity errorSampling frequency
ST-M3-3030 mm±5 mm0.25 μm<±8 μm10 kHz
ST-M3-30U30 mm±5 mm0.25 μm<±5 μm10 kHz
ST-M3-5050 mm±10 mm0.4 μm<±15 μm10 kHz
ST-M3-50U50 mm±10 mm0.4 μm<±10 μm10 kHz
ST-M3-8585 mm±20 mm0.8 μm<±40 μm10 kHz
ST-M3-85U85 mm±20 mm0.8 μm<±30 μm10 kHz
ST-M3-150150 mm±75 mm2 μm<±150 μm10 kHz
ST-M3-150U150 mm±75 mm2 μm<±113 μm10 kHz
ST-M3-250250 mm±150 mm10 μm<±450 μm10 kHz
ST-M3-250W250 mm±150 mm10 μm<±300 μm10 kHz
ST-M3-400400 mm±200 mm15 μm＜±600 μm10 kHz
ST-M3-400W400 mm±200 mm15 μm<±400 μm10 kHz
ST-M3-800800 mm±500 mm45 μm<±2000 μm10 kHz
ST-M3-800W800 mm±500 mm45 μm<±1000 μm10 kHz
ST-M3-30R25.7 mm±4.5 mm0.25 μm<±7.2 μm10 kHz
ST-M3-30UR25.7 mm±4.5 mm0.25 μm<±4.5 μm10 kHz
ST-M3-50R46.9 mm±4.5 mm0.4 μm＜±7.2 μm10 kHz
ST-M3-85UR77.5 mm±8 mm0.8 μm＜±12.8 μm10 kHz

ST-M5 Series Laser Displacement Sensor Parameters

ModelReference DistanceMeasurement RangeRepeatabilityLinearity ErrorSampling Frequency

| ----------- | -------: | ------: | ------: | --------: | -------------------------: |

ST-M5-3030 mm±5 mm0.35 μm＜±8 μmEthernet 31.25 kHz / Analog 50 kHz
ST-M5-30W30 mm±5 mm0.35 μm<±5 μmEthernet 31.25 kHz / Analog 50 kHz
ST-M5-5050 mm±10 mm0.6 μm<±15 μmEthernet 31.25 kHz / Analog 50 kHz
ST-M5-50W50 mm±10 mm0.6 μm<±10 μmEthernet 31.25 kHz / Analog 50 kHz
ST-M5-8585 mm±20 mm1.3 μm<±40 μmEthernet 31.25 kHz / Analog 50 kHz
ST-M5-85W85 mm±20 mm1.3 μm<±30 μmEthernet 31.25 kHz / Analog 50 kHz
ST-M5-150150 mm±75 mm3.5 μm＜±150 μmEthernet 31.25 kHz / Analog 50 kHz
ST-M5-150W150 mm±75 mm3.5 μm＜±113 μmEthernet 31.25 kHz / Analog 50 kHz
ST-M5-250250 mm±150 mm10 μm＜±450 μmEthernet 31.25 kHz / Analog 50 kHz
ST-M5-250W250 mm±150 mm10 μm＜±300 μmEthernet 31.25 kHz / Analog 50 kHz
ST-M5-400400 mm±200 mm15 μm<±600 μmEthernet 31.25 kHz / Analog 50 kHz
ST-M5-400W400 mm±200 mm15 μm<±400 μmEthernet 31.25 kHz / Analog 50 kHz
ST-M5-800800 mm±500 mm45 μm<±2000 μmEthernet 31.25 kHz / Analog 50 kHz
ST-M5-800W800 mm±500 mm45 μm<±1000 μmEthernet 31.25 kHz / Analog 50 kHz
ST-M5-30R25.7 mm±4.5 mm0.35 μm＜±4.5 μmEthernet 31.25 kHz / Analog 50 kHz
ST-M5-50R46.9 mm±5 mm0.6 μm＜±5 μmEthernet 31.25 kHz / Analog 50 kHz
ST-M5-85R76.5 mm±5.5 mm1.3 μm＜±8.8 μmEthernet 31.25 kHz / Analog 50 kHz
ST-M5-30WR25.7 mm±4.5 mm0.35 μm＜±4.5 μmEthernet 31.25 kHz / Analog 50 kHz
ST-M5-50WR46.4 mm±5 mm0.6 μm＜±5 μmEthernet 31.25 kHz / Analog 50 kHz
ST-M5-85WR76.5 mm±5.5 mm1.3 μm＜±8.8 μmEthernet 31.25 kHz / Analog 50 kHz
ST-M5-150WR107.5 mm±9 mm3.5 μm＜±14.4 μmEthernet 31.25 kHz / Analog 50 kHz

Parameter Description

The ST-M2 series sampling frequency is 5 kHz. ST-M3 models use 10 kHz sampling, while ST-M5 configurations support 31.25 kHz Ethernet acquisition or 50 kHz analog output. Select the exact model by reference distance, measuring range, repeatability, linearity, target surface, and interface.

Model Selection

View model selection guidance

Choosing an ST-M Series

- ST-M2 (5 kHz): for routine high-precision height, thickness, step, and dimensional checks where the process speed fits a 5 kHz acquisition rate.
- ST-M3 (10 kHz): for faster in-line inspection that needs twice the ST-M2 sampling rate while retaining model-specific distance and range options.
- ST-M5: for high-speed displacement, vibration, and runout monitoring with 31.25 kHz Ethernet acquisition or 50 kHz analog output on applicable configurations.

Choose the sensing head from the verified specification table by reference distance and measurement range first. Then confirm repeatability, linearity, target reflectivity, spot option, installation angle, controller, and communication interface. A sample test on the actual surface is recommended before final selection.

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