The DFRobot URM13 is an ultrasonic ranging sensor with open single probe. This sensor supports TRIG Pulse-triggered ranging(SR04 compatible), UART and I2C, which brings more possibilities for actual using scenarios. With a small and compact body, the sensor works well with 3.3V or 5V mainboards like Arduino, Raspberry Pi, easy to use and integrate into various applications. Besides, the UART mode employs standard ModbusRTU protocol and integrates receive/send control output to allow users to easily expand RS485 interface using external RS485 transceiver. URM13 is positioned to be a professional and advanced ultrasonic sensor. The integration of new precision circuit design and smart detection algorithms on the sensor makes it much more smaller and lighter while still excellent in sensitivity.

Max instantaneous work current 350mA
Effective measuring range 15cm～900cm
Distance resolution 1cm
Distance error ±1%
Temperature resolution 0.1℃
Temperature error ±1℃
Measuring frequency 10Hz
Operating temperature -10℃ to＋70℃
Operating humidity RH<75%
Sensor acoustic frequency 40±1KHz
Sensor direction angle 60°(-6dB)