Hokuyo UST-20LN Scanning Laser Obstacle Detection Sensor

HokuyoSKU: RB-Hok-35
Manufacturer #: UST-20LN

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Sale price $2,881.94

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  • 50×50×70mm (W×D×H) (sensor only)


  • 130g (Excluding cable)

External dimension

Hokuyo UST-20LN Scanning Laser Obstacle Detection Sensor- Click to Enlarge

Output circuit

Hokuyo UST-20LN Scanning Laser Obstacle Detection Sensor- Click to Enlarge

  • Supply voltage: DC 12V/DC 24V (operation range 10 to 30V ripple within 10%)
  • Supply current: 150mA or less (during start up 450mA is necessary.)
  • Light source: Laser semiconductor (905nm), Laser class 1(IEC60825-1:2007)
  • Accuracy: ±40mm*1
  • Repeated accuracy: σ<30mm*1
  • Scan angle: 270°
  • Scan speed: 25ms (Motor speed 2400rpm)
  • Angular resolution: 0.25°
  • Startup time: Within 10 sec (startup time differs if malfunction is detected during start up)
  • Input: IP reset input, photo-coupler input (current 4mA at ON)
  • Output: Synchronous Output, photo coupler open collector output 30VDC 50mA MAX.
  • Interface: Ethernet 100BASE-TX
  • LED display: Power supply LED display (Blue) : Blinks during start up and malfunction state.
  • Ambient temperature and humidity: -10°C to +50°C, below 85%RH(without dew, frost)
  • Storage temperature and humidity: -30°C to +70°C, below 85%RH(without dew, frost)
  • Vibration resistance (Operating): 55 to 150Hz 19.6m/s2 sweep of 2min for 30min in each X, Y and Z direction
  • Shock resistance: 196m/s2 (20G) X, Y and Z direction 10 times.
  • Protective structure: IP65
  • Material: Front case: Polycarbonate, Rear case: Aluminum

EMC standards

  • (EMI)
  • EN61326-1:2013
  • EN55011:2009 + A1:2010
  • (EMS)
  • EN61326-1:2013
  • EN61000-4-2:2009
  • EN61000-4-3:2006 + A1:2008 + A2:2010
  • EN61000-4-4:2012
  • EN61000-4-6:2009
  • EN61000-4-8:2010

Vibration resistance                                                              

  • 10 to 55Hz double amplitude of 1.5mm for 2hrs in each X, Y, and Z direction
  • 55 to 200Hz 98m / s2 sweep of 2min for 1hr in each X,Y and Z direction

Surrounding intensity

  • Less than 15,000lx

Note: Avoid direct sunlight or other illumination sources as it may cause sensor malfunction

Detection range

  • 0.06m to 20m (white Kent sheet)
  • 0.06m to 8m (diffuse reflectance 10%)
  • Max. detection distance: 60m


Power source, I/O cable

  • Red: COM Input+
  • Gray: COM Output-
  • Light Blue: IP Reset Input
  • Orange: Synchronous Output
  • Brown: +VIN (12VDC/24VDC)
  • Blue: -VIN

Ethernet cable

  • Blue: TX+
  • White: TX-
  • Orange: RX+
  • Yellow: RX-

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