HC-SR04 Ultrasonic Distance Sensor Module

Measure distances accurately from 2 cm to 400 cm using ultrasonic sound waves with the HC-SR04 - the most popular and reliable non-contact distance sensor for Arduino, Raspberry Pi, and embedded projects. Available now from The Tech Depot, Bengaluru with fast shipping, 7-day warranty on manufacturing defects, and expert technical support.

Specifications

Key Features

• Non-Contact Measurement: Uses ultrasonic pulses to measure distance without physically touching the target object.
• Wide Detection Range: Accurately senses objects from 2 cm up to 4 metres away, covering most hobbyist and industrial proximity needs.
• High Precision: +/-3 mm accuracy ensures reliable readings for robotics, automation, and instrumentation projects.
• Simple 4-Pin Interface: Just VCC, GND, Trigger, and Echo - easy to wire with minimal external components required.
• Broad Microcontroller Compatibility: Works seamlessly with Arduino Uno/Mega/Nano, ESP32, ESP8266, Raspberry Pi (with voltage divider on Echo), STM32, and more.
• Abundant Library Support: Dozens of well-maintained Arduino and Python libraries (NewPing, HCSR04, etc.) make coding effortless.
• Low Power Consumption: Draws only ~15 mA at 5 V, making it suitable for battery-powered and portable applications.
• Compact Form Factor: Small PCB with dual transducer cylinders fits easily into enclosures, robot chassis, and breadboard setups.

How It Works

The HC-SR04 operates on the time-of-flight principle. When you send a 10 us HIGH pulse to the Trig pin, the module emits eight 40 kHz ultrasonic bursts from the transmitter transducer. These sound waves travel through the air, bounce off the nearest object, and return to the receiver transducer. The module then outputs a HIGH pulse on the Echo pin whose duration is proportional to the round-trip travel time. Your microcontroller measures this pulse width and calculates distance using the formula:

Distance (cm) = Echo pulse width (us) / 58

This entire measurement cycle completes in under 25 milliseconds, allowing rapid successive readings for real-time applications.

Why Choose the HC-SR04 from The Tech Depot?

• 100% Authentic Modules: Sourced directly from authorized distributors - no clones, no counterfeits, no inconsistent readings.
• Factory-Tested Quality: Every unit is verified for correct frequency output and measurement accuracy before dispatch.
• Fast 1-5 days shipping: Ships from our Bengaluru warehouse to most Indian pin codes; same-day delivery available within Bengaluru.
• Expert Technical Support: Stuck on wiring or code? Our engineers provide hands-on guidance via email and WhatsApp around the clock.
• 7-day warranty on manufacturing defects: Full manufacturer warranty covers defects in materials and workmanship with hassle-free replacement.
• Trusted by Thousands: Engineering students, makers, startups, and industrial designers across India rely on The Tech Depot for quality components.

Project Ideas

• Obstacle-Avoiding Robot: Mount the HC-SR04 on a servo at the front of a wheeled robot to scan for obstacles and navigate autonomously around a room.
• Smart Parking System: Detect whether a parking spot is occupied or vacant and display real-time availability on an LCD or web dashboard.
• Water Tank Level Monitor: Point the sensor downward into a tank to measure water level and

Frequently Asked Questions

Buy HC-SR-04 Ultrasonic Distance Sensor Module Online in India

Purchase the HC-SR-04 Ultrasonic Distance Sensor Module online at The Tech Depot - India's most trusted electronics components store. We deliver across all major cities including Bengaluru, Mumbai, Delhi, Chennai, Hyderabad, Pune, Kolkata, Ahmedabad, Jaipur, and Surat. Get the best price on HC-SR-04 Ultrasonic Distance Sensor Module with fast 1-5 day shipping from our Bengaluru warehouse. All products are 100% authentic, sourced from authorized distributors with 7-day warranty on manufacturing defects.

Looking to buy HC-SR-04 Ultrasonic Distance Sensor Module at the best price in India? The Tech Depot offers competitive pricing, bulk discounts for orders of 10+ units, and dedicated technical support via email and WhatsApp. Whether you are a hobbyist, student, or professional engineer, we have everything you need for your electronics projects.