HC SR04 Ultrasonic Sensor

  • Operating Voltage: 5 V DC
  • Sonar Sensing Range: 2 cm – 400 cm
  • Maximum Effective Range: 450 cm
  • Frequency: 40 kHz
  • Sensing Angle: 15°
  • Mounting Hole Diameter: 3.8 mm
  • PCB Thickness: 2.8 – 3.1 mm
  • Mounting Bracket Material: Acrylic (optional)
Description
  • The HC-SR04 Ultrasonic Distance Sensor is a popular and affordable device used for distance measurement and object detection.
  • It works by emitting ultrasonic sound waves at 40 kHz from its transmitter. When these waves encounter an obstacle, they reflect back to the receiver.
  • The sensor measures the time delay between transmission and reception of the ultrasonic pulse to calculate distance using the formula:
  • Distance = (Time × Speed of Sound) / 2
  • A 10 µs trigger pulse starts a measurement cycle, making it easy to use with microcontrollers such as Arduino, ESP32, or Raspberry Pi.
  • Features low power consumption, stable operation, and high precision for indoor or outdoor use.
  • Commonly used in robotics, automation, and IoT projects requiring obstacle detection or range measurement.

PACKAGE INCLUDES:
  • 1 × HC-SR04 Ultrasonic Distance Sensor Module
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Application
  • Distance Measurement
  • Obstacle Detection and Avoidance
  • Level Measurement (Liquid/Solid)
  • Security Systems and Intrusion Detection
  • Gesture and Motion Recognition
  • Parking Assistance Systems
  • Flow or Presence Detection
  • Robotics Navigation and Mapping
  • Smart Automation & IoT Devices
TECHNICAL SPECIFICATIONS
Parameter Value
Operating Voltage 5 V DC
Sonar Sensing Range 2 cm – 400 cm
Maximum Effective Range 450 cm
Frequency 40 kHz
Sensing Angle 15°
Mounting Hole Diameter 3.8 mm
PCB Thickness 2.8 – 3.1 mm
Mounting Bracket Material Acrylic (optional)