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Gravity: URM09 Ultrasonic Distance Sensor (2～500cm)

SKU: SEN0304

This is the Gravity URM09 ultrasonic distance sensor module with open dual probes. It uses I2C communication and a Gravity PH2.0-4P vertical socket interface. Compatible with 3.3V/5V controllers (Arduino, Raspberry Pi), it has built-in temperature compensation. Effective ranging: 2cm-500cm, 1cm resolution, ±1% accuracy. Selectable ranges (150/300/500cm): shorter ranges mean shorter cycles but lower sensitivity.

Overview of Gravity: URM09 Ultrasonic Distance Sensor

Downloadable Resources

  • Docs
  • Tech Specs
  • Projects

    • 1. Example Code for Arduino-Distance and Temperature Measurement

    Passive measurement of distance and temperature. This example is the ultrasonic passive measurement of distance and module temperature and printing on the serial port.

    2. Example Code for Raspberry Pi-Distance and Temperature Measurement

    Passive measurement of distance and temperature on Raspberry Pi. This example sets the I2C device number, configures the module in passive mode, sends a ranging command, and reads distance and temperature data to print on the terminal.

    Reference

    The article offers a detailed exploration of the URM09 ultrasonic sensor, including library installation processes for Arduino and Raspberry Pi, communication protocol descriptions for different sensor versions, and API functionalities for effective sensor operation and data reading.

    Specification

    Parameter Value
    Supply Voltage 3.3V～5.5V DC
    Operating Current 20mA
    Operating Temperature Range -10℃～＋70℃
    Measurement Ranges 2cm～500cm (can be set)
    Resolution 1cm
    Precision 1%
    Direction Angle 60°
    Frequency 50Hz Max
    Dimension 47mm × 22 mm/1.85”× 0.87”

    Pinout

    Pinout

    Pin Description
    VCC Power Supply(3.3V-5.5V)
    GND Ground
    C I2C SLC
    D I2C SDA

    FAQ

    • Many ultrasonic sensors on the platform, how to choose?

      It is recommended to refer to this selection guide.

    • What is the detection range of the ultrasonic sensor?

      The detection range of an ultrasonic sensor depends on the wavelength and frequency it uses. The longer the wavelength and the smaller the frequency, the greater the detection distance. The following is the detection range of several popular products on our platform for your reference.

    • Hi,
      Many of our robot teams want to replace the expensive Ultrasonic sensors with this URM09. How do you read the distance if distance is larger than 256cm? Because we used a different SW SDK, how do you calculate distance from both registers 0x03 and 0x04 for distance > 256cm based on the datasheet posted on Wiki?

      0×03Distance Value High-order bitsR0x00-0xFF0x00LSB represents 1CM. e.g. 0x64 represents 100CM
      0×04Distance Value Low-order bitsR0x00-0xFF0x00LSB represents 1CM. e.g. 0x64 represents 100CM

      Thanks,
      John

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