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Gravity: URM09 Ultrasonic Sensor (I²C)

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DFRobot URM09 is an ultrasonic sensor specifically designed for fast ranging and obstacle avoidance applications. Its measuring frequency can reach up to 50Hz. The sensor adopts built-in temperature compensation and I2C communication. There are three measurement ranges designed for programs to select: 150cm, 300cm and 500cm. Please note that a shorter range will provide a shorter ranging cycle and lower sensitivity. You may need to set it according to your actual use. Besides, the sensor is equipped with on-board LDO, which is able to avoid performance attenuation within the power supply range.


  • Supply Voltage: 3.3~5.5V DC
  • Operating Current: 20mA
  • Operating Temperature Range:  -10℃~+70℃
  • Measurement Range: 2cm~500cm (can be set)
  • Resolution: 1cm
  • Accuracy: 1%
  • Frequency: 50Hz Max
  • Dimension: 47mm × 22 mm/1.85”× 0.87”