HC-SR04 Ultrasonic Sensor

The HC-SR04 Ultrasonic Sensor Module is a popular tool for measuring distance and detecting objects. Its small, easy to use, and combines everything you need: a transmitter, receiver, and control circuit in one module. It works like a sonar, sending out sound waves to measure the distance to objects, just like how bats and dolphins sense their surroundings. This makes it an ideal ultrasonic sensor module for robotics and IoT applications where accuracy and reliability are essential.

This HC-SR04-Ultrasonic Range Finder can measure distances from 2 cm up to 400 cm with high accuracy, about 3 mm, making it the best distance measuring sensor 2cm to 400cm for both beginners and professionals. Its reliable for many projects, from robotics to simple object detection, and works well even in different lighting conditions.

This HC SR04 ultrasonic distance sensor module has two main pins, Trigger and Echo, which connect easily to microcontrollers like Arduino, making it perfect as an ultrasonic distance sensor for Arduino projects where non-contact distance sensing is required. Understanding the HC-SR04 ultrasonic sensor working and pinout is simple, making it a go-to choice for students and developers.

Check out the best selection of Distance Sensors.

Note:The HC-SR04 sensor has a 5V output (which needs to be reduced to 3.3V to work with the Raspberry Pi).

Read our blog onhow to connect ultrasonic sensor to Raspberry Pi.

Looking for the Best Price for the HC SR 04 Ultrasonic Sensor Online?

At Robocraze, the HC-SR04 ultrasonic sensor price in India starts at 69, and may vary based on ongoing offers, stock availability, and bundled deals. We ensure high-quality, performance-tested modules that meet reliable accuracy standards for robotics, automation, and IoT applications.

Unlike low-grade alternatives in the market, our HC-SR04 sensors undergo quality checks to deliver stable distance measurements and consistent trigger/echo response. With competitive HC-SR04 ultrasonic sensor price in India, genuine components, and technical support, Robocraze provides better value compared to many generic sellers online.

Features:

• Non-Contact Distance Sensor
• Measures 2cm to 400cm
• Sonar technology for accuracy
• Suitable for robotics and DIY projects, including ultrasonic sensor module for robotics and IoT
• Stable performance indoors and outdoors
• Durable materials
• Easy to install, user-friendly
• 5V DC power supply
• High resolution: 0.3 cm
• Best ultrasonic sensor for Arduino and Raspberry Pi projects, ideal for ultrasonic distance sensor for Arduino projects

Applications:

• Used to avoid and detect obstacles with robots like biped robots, obstacle avoider robots, path-finding robots, etc.
• Used to measure the distance within a wide range of 2cm to 400cm
• Can be used to map the objects surrounding the sensor by rotating it
• The depth of certain places like wells, pits, etc. can be measured since the waves can penetrate through the water
• Its wide measuring range makes it the best distance measuring sensor 2cm to 400cm for real-world applications.

Read our blog explaining the ultrasonic sensor working.

Working & Pinout Explanation:

Understanding the HC-SR04 ultrasonic sensor working and pinout is essential for integrating it into your projects. The module operates using two main pins:

• Trigger Pin: Sends ultrasonic pulses
• Echo Pin: Receives reflected signals

The sensor calculates distance based on the time taken for the sound waves to return. This simple mechanism makes it highly effective for automation, robotics, and obstacle detection systems. Its easy interface is one reason why it is widely used as an ultrasonic distance sensor for Arduino projects.

Pinout

Wiring Diagram:

HC SR 04 Ultrasonic Sensor Specifications Comparison: