HC-SR04 Ultrasonic Sensor Distance Measuring Module

R30.90  Inc VAT
Order Quantity Price Per Item
3 R30.28
10 R29.82
30 R29.36
100 R28.58
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This economical sensor provides 2cm to 400cm of non-contact measurement functionality with a ranging accuracy that can reach up to 3mm. Each HC-SR04 module includes an ultrasonic transmitter, a receiver and a control circuit.

There are only four pins that you need to worry about on the HC-SR04: VCC (Power), Trig (Trigger), Echo (Receive), and GND (Ground). You will find this sensor very easy to set up and use for your next range-finding project!


  • Model: HC-SR04
  • Color: Blue Silver
  • Working voltage : 5V(DC)
  • Static current: Less than 2mA.
  • Output signal: Electric frequency signal, high level 5V, low level 0V.
  • Sensor angle: Not more than 15 degrees.
  • Detection distance: 2cm~450cm.
  • High precision: Up to 3mm
  • Mode of connection: VCC / trig(T) / echo(R) / GND
  • Module Working Principle:
  • Adopt IO trigger through supplying at least 10us sequence of high level signal
  • The module automatically send eight 40khz square wave and automatically detect whether it receive the returning pulse signal

What's in the box?

1 x HC-SR04 distance sensor


Follow this tutorial at ThePiHut.

Using GPIOZero

  • Availability: 51 In Stock
  • Model: sensor ultrasonic blue
  • Brand: Generic3