Ultrasonic Range Measurement Module - HC-SR04

$7.00 Inc. GST
24 Available Now
(More Available Soon)

This is a low cost ultrasonic rang measurement module, used in robotics or anywhere that you need to sense distance. The HC-SR04 ultrasonic ranging module provides 2cm - 400cm (4 meters) non-contact measurement, the ranging accuracy can reach up to 3mm. The module includes ultrasonic transmitter, receiver and control circuit.

Basic usage

  1. Using a microcontroller IO, trigger for at least 10us high level signal
  2. The Module automatically sends eight 40 kHz and detect whether there is a pulse signal back.
  3. If a signal comes back, the output it pulled high, the length of time the output IO is pulled high is the time the ultrasonic signal took to return.

The test distance = (high level time multiplied by the velocity of sound (340m/s) / 2.


  • Working Voltage: DC 5 V
  • Working Current: 15mA
  • Max Range: 4m
  • Min Range: 2cm
  • Measuring angle: 15 degrees
  • Trigger Input Signal: 10uS TTL pulse
  • Echo Output Signal: Input TTL lever signal and the range in proportion
  • Dimensions: 45*20*15mm

Please check the datasheet for detailed specifications and usage information.

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