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Ultrasonic Sensor Module - HC-SR04

SKU: BC3F60KIPY
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The HC-SR04 Ultrasonic Sensor Module is a non-contact distance measurement sensor that uses 40kHz ultrasonic sound waves to accurately measure the distance between the sensor and an object. It consists of an ultrasonic transmitter, receiver, and control circuitry that calculate distance by measuring the time taken for the ultrasonic pulse to travel to an object and return as an echo....
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The HC-SR04 Ultrasonic Sensor Module is a non-contact distance measurement sensor that uses 40kHz ultrasonic sound waves to accurately measure the distance between the sensor and an object. It consists of an ultrasonic transmitter, receiver, and control circuitry that calculate distance by measuring the time taken for the ultrasonic pulse to travel to an object and return as an echo. It provides reliable distance measurements from 2cm to 400cm with an accuracy of up to ±3mm.

Operating from a 5V DC supply, the HC-SR04 interfaces easily with Arduino, Raspberry Pi, ESP32 (using proper logic level conversion on the Echo pin), STM32, PIC, AVR, and other microcontrollers through simple Trigger and Echo digital pins. Its low cost, high accuracy, and easy interfacing make it one of the most popular distance sensors for robotics, obstacle avoidance, parking systems, automation, and educational electronics projects.

Key Features

  • Non-contact ultrasonic distance measurement
  • Measuring range from 2cm to 400cm
  • High accuracy up to ±3mm
  • 40kHz ultrasonic operating frequency
  • Simple 4-pin interface
  • Trigger and Echo digital communication
  • Fast and reliable distance detection
  • Low power consumption
  • Narrow beam angle for accurate sensing
  • Easy interface with Arduino, ESP32, STM32, Raspberry Pi, and other microcontrollers
  • Compact PCB design
  • Stable performance in indoor environments
  • Cost-effective solution for distance sensing
  • Ideal for robotics and automation projects

Shipping & Returns

Orders placed before 3 PM IST will be shipped on the same day (excluding Sundays and Public holidays) through our shipping partners. In rare cases, the pickup may get delayed during Public holidays / Bandh / Environmental disturbances.

Specifications

Specifications:

Module Type: Ultrasonic Distance Sensor Module
Model: HC-SR04
Operating Principle: Ultrasonic Time-of-Flight (ToF) Measurement
Operating Voltage: 5V DC
Operating Current: 15mA (Typical)
Quiescent Current: Less than 2mA
Operating Frequency: 40kHz
Measuring Range: 2cm to 400cm
Maximum Detectable Distance: Approximately 4m
Measurement Accuracy: ±3mm
Resolution: 0.3cm (Typical)
Measuring Angle: Less than 15°
Trigger Input Pulse Width: Minimum 10µs TTL Pulse
Output Signal: TTL Pulse Width Corresponding to Distance
Response Time: Approximately 50ms Measurement Cycle
Interface: Digital Trigger and Echo Pins
Operating Temperature: -15°C to +70°C
Module Dimensions: Approximately 45mm × 20mm × 15mm
Weight: Approximately 9g
Mounting Type: PCB Module with Through-Hole Mounting Holes
Compatibility: Arduino, ESP32 (with logic level conversion for Echo), STM32, Raspberry Pi, AVR, PIC, 8051 and other microcontrollers

Additional Resources

HC-SR04.PDF

FAQ

1. What is the HC-SR04 Ultrasonic Sensor used for?

The HC-SR04 is used for non-contact distance measurement in robotics, obstacle avoidance systems, parking sensors, water level monitoring, automation, and embedded electronics projects.

2. What is the measuring range of the HC-SR04?

The HC-SR04 can accurately measure distances from 2cm to 400cm (4 meters) with a typical accuracy of ±3mm.

3. Can the HC-SR04 be used with Arduino and ESP32?

Yes. The HC-SR04 is compatible with Arduino, STM32, Raspberry Pi, PIC, and AVR microcontrollers. It can also be used with ESP32, although a voltage divider or logic level converter is recommended for the Echo pin because the sensor outputs a 5V signal.

4. How does the HC-SR04 measure distance?

The sensor emits a 40kHz ultrasonic pulse through the transmitter. When the sound wave reflects off an object and returns to the receiver, the module measures the travel time and calculates the distance based on the speed of sound.

5. What are the four pins on the HC-SR04 module?

The HC-SR04 has four pins: VCC (5V power), Trig (trigger input), Echo (pulse output indicating distance), and GND (ground), making it easy to interface with most microcontrollers.