SR04 Ultrasonic Sensor


  • Measures the distance within a wide range of 2cm to 450cm
  • Stable performance
  • Accurate distance measurement
  • High-density
  • Small blind distance
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SRO4 Ultrasonic Sensor

This is the HC-SR04 ultrasonic distance sensor. 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!

This sensor has additional control circuitry that can prevent inconsistent “bouncy” data depending on the application

Model HC-SR04
Frequency 40 kHz
Operating Voltage 5V
PCB Size ( L x W ) 4.5 x 2 cm
Range 2cm-450cm
Sensing Angle Not more than 15 degrees
Static Current Less than 2mA.



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