HC-SR04 Ultrasonic sensor for Arduino/Raspberry PiSKU 2005

Sensors & Modules

HC-SR04 Ultrasonic sensor for Arduino/Raspberry Pi

₹74

01 — About

What it does

The HC-SR04 Ultrasonic sensor for Arduino/Raspberry Pi is a non-contact distance measurement module using ultrasonic waves. It offers reliable object detection and ranging from 2cm to 400cm for robotics, automation, and IoT projects.

Key features

  • Non-contact distance measurement from 2cm to 400cm
  • High accuracy of ±3mm across the measurement range
  • Easy trigger/echo interface works with any microcontroller
  • 5V operation directly compatible with Arduino
  • 40kHz ultrasonic frequency outside human hearing
  • Compact module size for easy mounting
  • Low cost compared to IR and laser distance sensors

Good to know

  • Works best with flat surfaces perpendicular to sensor
  • Soft or angled surfaces may absorb or deflect sound
  • Multiple sensors may interfere – use sequential triggering
  • Temperature affects speed of sound – add compensation for accuracy
  • Minimum 60ms delay between measurements recommended

02 — Datasheet

Specifications

10
Model
HC-SR04
Operating Voltage
5V DC
Measuring Range
2cm – 400cm
Resolution
0.3cm
Accuracy
±3mm
Measuring Angle
15° cone
Ultrasonic Frequency
40kHz
Trigger Pulse
10μs TTL
Echo Pulse
TTL (duration = distance)
Current Draw
< 15mA