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HC-SR-04 Ultrasonic Distance Sensor Module

HC-SR-04 Ultrasonic Distance Sensor Module

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  • Non-Contact Distance Sensor: HC-SR04 Ultrasonic Range Finder measures 2-400cm and is suitable for various applications.
  • Endless Possibilities: Includes Sonar technology for accurate readings, perfect for robotics and DIY projects.
  • Compact and Reliable: HC-SR04 features a small blind distance and provides stable performance.
  • Durable Build: Made with high-quality materials, ideal for indoor and outdoor use.
  • User-Friendly: Easy to install, suitable for beginners and experts.

HC-SR-04 Ultrasonic Sensor

Discover the HC-SR04 Ultrasonic Range Finder – your gateway to precision and convenience in the world of robotics, automation, and DIY projects. If you're in India and looking to buy a non-contact distance sensor that provides accurate measurements from 2cm to 400cm, your search ends here.

This Ultrasonic Sensor is  crafted with durable materials, this sensor is your trusty companion for both indoor and outdoor applications. The Sonar technology embedded in the HC-SR04 ensures consistent and reliable readings. Its small blind distance and stable performance make it a top choice for professionals and hobbyists alike.

But that's not all - we've made it user-friendly, ensuring a hassle-free installation process, perfect for beginners and experts. And the best part? It's available at an affordable price, giving you exceptional value for your investment.

Make the HC-SR04 Ultrasonic Range Finder your go-to sensor for your next project, and see the difference precision and quality make.

The HCSR04 Ultrasonic Sensor is designed for easy integration, making it suitable for users of all skill levels. It's perfect for tasks such as obstacle detection, object mapping, and depth measurement. For larger projects, consider our Ultrasonic Distance Sensor-Pack of 20.

Get your HCSR04 Ultrasonic Sensor today and take your DIY projects to the next level. Order now and enjoy free shipping on orders above Rs 500/- within India.

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

Read our blog on how to connect ultrasonic sensor to Raspberry Pi where we discuss how ultrasonic Sensors Work, how to calculate the distance between the ultrasonic sensor and the object, and the complete process of Interfacing HC-SR04 with Raspberry Pi.


  • Non-Contact Distance Sensor
  • Measures 2cm to 400cm
  • Sonar technology for accuracy
  • Suitable for robotics and DIY projects
  • Stable performance indoors and outdoors
  • Durable materials
  • Easy to install, user-friendly
  • Affordable price
  • 5V DC power supply
  • Ranging distance: 2cms – 400cms
  • High resolution: 0.3 cm


  • 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

read our blog explaining the ultrasonic sensor working, which provides comprehensive information about ultrasonic sensors. It covers the working principle, applications, advantages

Package Includes:

  • 1 x HC-SR04 Ultrasonic sensor


Power Supply +5V DC
Working Current 15mA
Output Signal Electrical frequency signal
Ranging Distance 2cms – 400 cms
Resolution 0.3 cm
Measuring Angle 30 degree
Dimensions  3 x 2 x 1cms
Weight  15 grams

Shipping & Returns

  • All orders confirmed before 3 pm IST are shipped on the
    same day, barring rare pickup delays on holidays or disturbances
  • Delivery time in Metro cities is 1-3 days, Others it is
    3-7 days. It varies based on location, reliant on courier services
  • Return window: 7 days from receipt unless stated
    otherwise. No refunds/replacements after
  • Returns only for non-working/damaged products are accepted
  • Initiate return requests to our customer service team via Support ticket or contact us at +91-8123057137
  • Refunds are processed within 3-4 working days post inspection and approval.

For more details, please check our Shipping and Return Policy

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1. How does ultrasonic sensor work?

As we connect the ultrasonic sensor to 5V and initialize the input pin, it starts transmitting the sound waves which then travel through the air and hit the required object. These waves hit and bounce back from the object and then collected by the receiver of the module. Distance is directly proportional to the time these waves require to come back at the receiving end. The more the time taken, more the distance will be.

2. Is ultrasonic sensor better or IR sensor for my project?

Choosing sensor is completely dependent upon your application. There are a lot of limitations in infrared sensors, like the inability to use them in sunlight due to interference. It can make outdoor applications or dark indoor applications difficult. Ultrasonic sensors work using sound waves, detecting obstacles is not affected by as many factors. &qnbsp;If reliability is an important factor in your sensor selection, ultrasonic sensors are more reliable than IR sensors.

3. What is the basic principle of ultrasonic sensor?

Ultrasonic sensors rely on the principles of echolocation to measure distances and detect objects. Using ultrasonic waves, they are able to generate a wave that is sent out from their transmitter which then bounces off an object or surface in its path before returning back as an echo. This information can then be used by the sensor's receiver unit for distance calculation analysis and detection by measuring the amount of time it took between sending out and receiving back the soundwave. Ultrasonic sensors offer reliable robust solutions suitable for use across many industries such as automotive production lines, robotics, agriculture, and medical diagnostics among others due to their compact design with built-in signal processing capabilities providing accuracy down to submillimetre-level precision.

4. What is ultrasonic sensor used for?

Ultrasonic sensors are used for a variety of purposes, from detecting the presence and proximity of objects to measuring distances. They can be used in industrial applications such as warehousing and autonomous navigation systems, or they may be found on consumer devices like phone accessories that detect when an object is close by. Ultrasound waves sent out at frequencies above human hearing create sound echoes which bounce off solid objects like walls and barriers; this can then inform the user how far away something is located. This makes it ideal for robotics, automation processes, and medical imaging/diagnosis among other commercial uses.

5. Is HC-SR04 analog or digital?

The HC-SR04 is a well-known and highly sought after ultrasonic sensor frequently utilized in diverse electronic projects. Its operation involves transmitting high-frequency sound waves, which are then measured based on the time it takes for them to reflect off an object. This calculation enables accurate distance determination. A common inquiry surrounding this sensor concerns its classification as either analog or digital. In essence, its output signal is pulse width modulated (PWM), offering versatility as it can be interpreted differently depending on our preference - analogous or digital form conversion both being feasible options of utilization with ease and seamless integration capabilities into various applications.