Ultrasonic Ranging Sensor HC-SR04

Ultrasonic Ranging Sensor HC-SR04

The Ultrasonic Ranging Sensor HC-SR04 is one of the common distance sensor for Arduino projects. It works extremely well with any Arduino Board. The basic principle of this device is that it sends a sound wave, hits an object and return back to the sensor. The time is  multiplied by the speed of sound with the following computation:  343m/sec 0.0343cm/μs = [1/29.1] cm/μs approximate to give the total distance traveled by the ultrasonic beam. Which then is then divided by 2.

Simply: Distance = (Time for wave to return * Speed of sound) / 2


  • The power supply is 5VDC
  • Effective angle for computation: < 30 degrees
  • Ideal distance: 2cm to 500 cm
  • Resolution: 1 cm
  • Ultrasonic Frequency: 40k Hz


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Ultrasonic Ranging Sensor HC-SR04

  • Brand: OEM
  • Product Code: AF112
  • Availability: 919
  • ₱87