SEN0491 Laser Ranging Sensor UART (4-400cm)

  • Mã sản phẩm: SEN0491 Laser Ranging Sensor
  • Nhà sản xuất: DFRobot
  • Website hỗ trợ:


This laser range sensor can be used to detect objects in 4~400cm with ±2cm accuracy. With 3 measurement modes supported, it is well applicable to various detection scenarios like security gate detection, access control systems, security alarm devices, smart trash cans, smart cars, or robots for obstacle avoidance.

The sensor metal black shell adopts a threaded barrel design and its probe comes with an optical cover. The integrated design makes the product able to effectively filter optical interference, waterproof and shockproof. The sensor uses an invisible laser and there is a voltage regulator circuit inside the module. Featuring stable performance and UART output, the sensor has an alarm output line that will be triggered to output Low steadily when the measurement distance is smaller than the user-set threshold.

Note: The data will be unstable when measuring black objects.

Laser Ranging Sensor UART- 4m

Product Overview



  • Laser ranging
  • Wide voltage of 6-36V
  • UART output
  • Made with metal, waterproof and shockproof


  • Power Supply Voltage: 6-36 V
  • Measuring Distance: 4-400 cm
  • Measurement Accuracy: ±2 cm
  • Emitting Angle: 39.6°
  • Receiving Angle: 36.5°
  • Working Current: <38mA
  • Communication Interface: UART
  • Waterproof Rating: IP67
  • Baud Rate: 2400-921600 optional 115200 (default)
  • Frequency: 20Hz (default)
  • Working Temperature: -20~70°C
  • Size: 21.5×21×8 mm / 0.85×0.83×0.31 inch



  • Laser Ranging Sensor UART (4-400cm) x1
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