{"product_id":"hc-sr-04-ultrasonic-sensor","title":"HC-SR-04 Ultrasonic Sensor","description":"\u003cmeta name=\"description\" content=\"Buy HCSR04 Ultrasonic Sensor online in India at best price from The Engineer Store, Bengaluru. Authentic product, 7-day warranty on manufacturing defects, fast delivery across India.\"\u003e\n```html\n\u003ch1\u003eHC-SR04 Ultrasonic Distance Sensor\u003c\/h1\u003e\n\u003cp\u003eMeasure distances with precision using the HC-SR04 Ultrasonic Sensor - the go-to module for robotics, obstacle avoidance, and automation projects. Available now from The Engineer Store, Bengaluru, with fast shipping and full technical support.\u003c\/p\u003e\n\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eModule\u003c\/td\u003e\n\u003ctd\u003eHC-SR04 Ultrasonic Ranging Sensor\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Voltage\u003c\/td\u003e\n\u003ctd\u003e5V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Current\u003c\/td\u003e\n\u003ctd\u003e15 mA (typical)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMeasuring Range\u003c\/td\u003e\n\u003ctd\u003e2 cm - 400 cm (0.8 in - 13 ft)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAccuracy\u003c\/td\u003e\n\u003ctd\u003e+\/-3 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMeasuring Angle\u003c\/td\u003e\n\u003ctd\u003e\u0026lt;=15 degrees effective cone\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUltrasonic Frequency\u003c\/td\u003e\n\u003ctd\u003e40 kHz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTrigger Input Signal\u003c\/td\u003e\n\u003ctd\u003e10 us TTL pulse\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEcho Output Signal\u003c\/td\u003e\n\u003ctd\u003eTTL level pulse proportional to distance\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInterface Pins\u003c\/td\u003e\n\u003ctd\u003eVCC, Trig, Echo, GND (4-pin header)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBoard Dimensions\u003c\/td\u003e\n\u003ctd\u003e45 mm x 20 mm x 15 mm (approx.)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompatibility\u003c\/td\u003e\n\u003ctd\u003eArduino, Raspberry Pi, ESP32, ESP8266, STM32, PIC \u0026amp; more\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003eOriginal \/ Authentic Module\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWarranty\u003c\/td\u003e\n\u003ctd\u003e7-day warranty on manufacturing defects\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSupport\u003c\/td\u003e\n\u003ctd\u003eEmail \u0026amp; WhatsApp 24\/7\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch2\u003eHow It Works\u003c\/h2\u003e\n\u003cp\u003eThe HC-SR04 uses ultrasonic sound waves to calculate distance. Send a 10 us HIGH pulse to the \u003cstrong\u003eTrig\u003c\/strong\u003e pin - the module emits eight 40 kHz bursts, then the \u003cstrong\u003eEcho\u003c\/strong\u003e pin goes HIGH for a duration proportional to the round-trip time of the sound wave. Use the formula \u003cem\u003eDistance = (Echo pulse width x Speed of sound) \/ 2\u003c\/em\u003e to convert the reading into centimeters or inches. Most Arduino libraries handle this automatically in a single line of code.\u003c\/p\u003e\n\n\u003ch2\u003ePin Configuration\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eVCC\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e+5V DC Power Supply\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTrig\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eTrigger Input - send 10 us pulse to start measurement\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eEcho\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eEcho Output - returns pulse width proportional to distance\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eGND\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eGround\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch2\u003eWhy Choose the HC-SR04 from The Engineer Store?\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e100% authentic modules sourced from trusted, authorized suppliers\u003c\/li\u003e\n\u003cli\u003eReliable +\/-3 mm accuracy across a 2 cm - 400 cm range\u003c\/li\u003e\n\u003cli\u003ePlug-and-play with Arduino, Raspberry Pi, ESP32, and virtually any microcontroller\u003c\/li\u003e\n\u003cli\u003eMassive community support - thousands of tutorials, libraries, and code examples available online\u003c\/li\u003e\n\u003cli\u003e1-5 day shipping, 7-8 day delivery from our Bengaluru warehouse; same-day delivery within Bengaluru\u003c\/li\u003e\n\u003cli\u003eExpert technical support included to help you wire, code, and troubleshoot\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eProject Ideas\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eObstacle-Avoiding Robot:\u003c\/strong\u003e Mount the sensor on a servo to scan surroundings and navigate autonomously.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSmart Parking System:\u003c\/strong\u003e Detect whether a parking slot is occupied and display availability on an LCD or web dashboard.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWater Level Monitor:\u003c\/strong\u003e Place the sensor above a tank to measure water level without contact and trigger alerts or pump control.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDigital Measuring Tape:\u003c\/strong\u003e Build a handheld distance meter with an OLED display for quick, contactless measurements.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGesture \/ Proximity Control:\u003c\/strong\u003e Map hand distance to volume, brightness, or motor speed for touchless interfaces.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSecurity \u0026amp; Intruder Alert:\u003c\/strong\u003e Trigger a buzzer or notification when an object enters a defined zone.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLearning \u0026amp; Education:\u003c\/strong\u003e Ideal first sensor project for students - simple wiring, easy code, and instant visual results.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eQuick-Start Arduino Example\u003c\/h2\u003e\n\u003cp\u003eWire VCC -\u0026gt; 5V, GND -\u0026gt; GND, Trig -\u0026gt; Digital Pin 9, Echo -\u0026gt; Digital Pin 10, then upload:\u003c\/p\u003e\n\u003cpre\u003e\n#define TRIG 9\n#define ECHO 10\n\nvoid setup() {\n Serial.begin(9600);\n pinMode(TRIG, OUTPUT);\n pinMode(ECHO, INPUT);\n}\n\nvoid loop() {\n digitalWrite(TRIG, LOW);\n delayMicroseconds(2);\n digitalWrite(TRIG, HIGH);\n delayMicroseconds(10);\n digitalWrite(TRIG, LOW);\n\n\u003cp\u003elong duration = pulseIn(ECHO, HIGH);\u003c\/p\u003e\n\u003cp\u003efloat distance_cm = duration * 0.0343 \/ 2.0;\u003c\/p\u003e\n\n Serial.print(\"Distance: \");\n Serial.print(distance_cm);\n Serial.println(\" cm\");\n delay(500);\n}\n\u003c\/pre\u003e\n\n\u003ch2\u003eWhat's in the Box\u003c\/h2\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhen will I receive my order?\u003c\/summary\u003e\n\u003cp\u003eProducts ship within 1-5 days from our Bengaluru warehouse. Delivery within 7-8 days to most locations across India.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eIs technical support available?\u003c\/summary\u003e\n\u003cp\u003eYes, 24\/7 support via email and WhatsApp for setup, troubleshooting, and application guidance.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhat is your return policy?\u003c\/summary\u003e\n\u003cp\u003e7-day returns on manufacturing defects only. Full refund or replacement. Not applicable for user damage or misuse.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eAre bulk discounts available?\u003c\/summary\u003e\n\u003cp\u003eYes, wholesale pricing on orders of 10+ units. Contact us via WhatsApp or email for a custom quote.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003ch2\u003eBuy HC-SR-04 Ultrasonic Sensor Online in India\u003c\/h2\u003e\n\u003cp\u003ePurchase the \u003cstrong\u003eHC-SR-04 Ultrasonic Sensor\u003c\/strong\u003e online at \u003ca href=\"https:\/\/theengineerstore.in\"\u003eThe Engineer Store\u003c\/a\u003e - 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 \u003cstrong\u003eHC-SR-04 Ultrasonic Sensor\u003c\/strong\u003e 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.\u003c\/p\u003e\n\u003cp\u003eLooking to buy \u003cstrong\u003eHC-SR-04 Ultrasonic Sensor\u003c\/strong\u003e at the best price in India? The Engineer Store 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.\u003c\/p\u003e","brand":"My Store","offers":[{"title":"Default Title","offer_id":43720254029987,"sku":"TES-EV2153","price":78.44,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/4479\/7091\/products\/1678695150858-0a0b3c00f0c64fc2-B92F2D762AD8C4E10CBDD985BB6D5FAA.jpg?v=1699528112","url":"https:\/\/www.theengineerstore.in\/kn\/products\/hc-sr-04-ultrasonic-sensor","provider":"The Engineer Store","version":"1.0","type":"link"}