--- product_id: 25292147 title: "ELEGOO Ultrasonic Sensor" brand: "elegoo" price: "€ 18.81" currency: EUR in_stock: true reviews_count: 13 category: "Elegoo" url: https://www.desertcart.be/products/25292147-elegoo-ultrasonic-sensor store_origin: BE region: Belgium --- # 3-450 cm range 40 kHz ultrasonic burst 5-pack for prototyping ELEGOO Ultrasonic Sensor **Brand:** elegoo **Price:** € 18.81 **Availability:** ✅ In Stock ## Summary > 🚀 Elevate your prototypes with ultrasonic precision—don’t get left behind! ## Quick Answers - **What is this?** ELEGOO Ultrasonic Sensor by elegoo - **How much does it cost?** € 18.81 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.be](https://www.desertcart.be/products/25292147-elegoo-ultrasonic-sensor) ## Best For - elegoo enthusiasts ## Why This Product - Trusted elegoo brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **STEM & Robotics Ready:** Ideal for obstacle avoidance, parking alerts, automatic lids, and interactive STEM projects that impress. - • **Multi-Module Flexibility:** Five sensors included to prototype, compare, and scale your robotics or IoT builds effortlessly. - • **Precision Distance Sensing:** Accurately measures from 3 to 450 cm with 0.3 cm resolution for flawless project integration. - • **Robust Ultrasonic Technology:** Utilizes 40 kHz ultrasonic bursts for reliable, non-contact object detection in diverse environments. - • **Seamless Arduino Compatibility:** Plug-and-play with Arduino UNO, MEGA, Nano, and popular modules like XBee and ZigBee for rapid development. ## Overview The ELEGOO 5PCS HC-SR04 Ultrasonic Module Distance Sensor Kit offers five high-precision sensors operating at 40 kHz, capable of measuring distances from 3 to 450 cm with 0.3 cm resolution. Designed for seamless integration with Arduino platforms, this kit empowers professionals and hobbyists alike to build advanced robotics, obstacle detection, and interactive STEM projects. Its robust design supports outdoor use and continuous operation, making it a versatile tool for innovative prototyping and reliable distance sensing. ## Description desertcart.com: ELEGOO 5PCS HC-SR04 Ultrasonic Module Distance Sensor Kit | Compatible with Arduino UNO MEGA Nano Robot XBee ZigBee, Measure 3-450 cm, Obstacle Avoidance, Parking Alerts, STEM Projects : Industrial & Scientific Review: Measures distance to water accurately. I'm using it to caclulate bridge clearance. Works OUTSIDE! (in a plastic box) - Complete project description follows but the keys for the Ultrasonic Distance Sensor: 1) it's been running in a plastic box, outside, for almost a month with no problem. The Arduino wakes us every 15 minutes and takes a measurement, transmits it, then goes back to sleep. 2) it is measuring the distance TO WATER! I even turned the swim jets in my pool on to test turbulence and it works fine. Green Pond Bridge Boat Clearance At ‘very low tide’ the clearance under Green Pond Bridge in Cape Cod is 6’6” or less and that is too low for the boat I use. The tide charts for Falmouth, MA are theoretical and can vary as much as 18” from what is actually happening at the bridge. This system monitors the clearance and transmits the information on the internet. All of these parts were purchased from desertcart. Transmitter An (Arduino) Elegoo UNO R3 board is connected to an Elegoo HC-SR04 Ultrasonic Distance Sensor. The UNO and the sensor calculate the distance from a fixed dock to the sea level, then transmit that data using a MakerFocus NRF24L01 Wireless Transceiver to the Receiver described below. The Transmitter sits on the end of a dock where there is no power, so the UNO, Transceiver and Distance Sensor are powered by the energyShield 2. This battery has special capabilities – it wakes everything up every 15 minutes. The system takes a couple readings of the distance to the water then transmits that data, then the battery shuts it all off. The data transmitted includes information from the battery – time, date, and voltage. I have been testing this unit at home (in Dallas) and it has been operating outside, for about 20 days. Based on battery drain it looks like it will operate for about 4-5 months before it needs a recharge. When the temperature drops below zero the system still works fine but the voltage reported in the battery seems low. All of this is housed in a plastic box printed for the purpose with a FlashForge 3d Printer Creator Pro, using eSun White ABS+ filament Picture below. Receiver An (Arduino) Elegoo MEGA 2560 R3 is connected to another NRF24 Transceiver to receive the data. The MEGA does the math to convert the distance from the dock to the water, to the bridge clearance. Then the information is displayed on an Elegoo UNO R3 Touch Screen (that also works fine on the Mega). Picture below. A small plastic frame for the Receiver was also printed on the 3d printer Web Server Finally, the information in the MEGA is transmitted over a serial bus to a Hiletgo ESP8266 NodeMCU ESP-12E Internet WIFI Development Board (Also operates using Arduino IDE programming). This board is connected to the MEGA via the XCSOURCE Logic Level Converter and powered by a UCEC MB102 Breadboard Power Supply Module. All mounted on an Elegoo Breadboard. The ESP8266 is programmed to be a web server. It connects to the internet through the modem/router provided by AT&T. Picture of my cell phone below. Review: Pretty reliable for short term harsh conditions. - These have worked great for sensing water level. I have had it sitting at the top of a sealed tank with two holes just big enough for the sensors to fit. I DIYed an enclosure out of an old plastic case that some GRK screws came in. This is absolutely not the recommended way to use them, but have been receiving accurate measurements for the last ~3 weeks with a 15 second update interval running 24/7. ## Features - NON-CONTACT DISTANCE SENSING: Add object detection to robot navigation, parking-distance prototypes, automatic lids, counters and interactive projects; each HC-SR04 uses a 40 kHz ultrasonic burst and echo timing to estimate distance - 5-PACK FOR REPEATABLE PROTOTYPING: Use multiple HC-SR04 modules across builds, compare sensor positions or keep spares for testing and replacement; each module integrates an ultrasonic transmitter, receiver and control circuit - 5 V MODULE WITH 3-450 CM RANGE: Connect VCC, Trig, Echo and GND, use a 10 µs trigger pulse and measure Echo duration; resolution is 0.3 cm with an effective angle under 15°, while the controller board and external power source are not included - PROTECT 3.3 V GPIO: The HC-SR04 operates from 5 V and its Echo output is 5 V, so use a voltage divider or suitable level shifting with 3.3 V inputs; keep the module dry and use it for prototyping rather than calibrated measurement - FOR ROBOTICS & STEM PROJECTS: Suitable for distance measurement, object detection, automatic lids, parking alerts, robot navigation and other hands-on electronics builds ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B01COSN7O6 | | Best Sellers Rank | #20,596 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #2 in Ultrasonic Proximity Sensors | | Brand | ELEGOO | | Brand Name | ELEGOO | | Customer Reviews | 4.5 out of 5 stars 623 Reviews | | Global Trade Identification Number | 00746591610333 | | Included Components | Ultrasonic Sensor | | Item Dimensions | 0.59 x 1.77 x 1.18 inches | | Item Highlight | Compatible with Arduino UNO MEGA Nano Robot XBee ZigBee, Measure 3-450 cm, Obstacle Avoidance, Parking Alerts, STEM Projects | | Item Weight | 9.07 g | | Item dimensions L x W x H | 0.59 x 1.77 x 1.18 inches | | Manufacturer | ELEGOO | | Material | Aluminum | | Material Type | Aluminum | | Maximum Supply Voltage | 5 volts | | Measuring Range | 3 centimeters to 450 centimeters | | Model | EL-SM-001 | | Number of Items | 5 | | Output Type | TTL | | Part Number | EL-SM-001 | | Sensing Distance | 2 centimeters | | Specific Uses For Product | Distance Measurement, Electronics Project, Obstacle Avoidance, Robotics, STEM learning | | UPC | 719377200301 746591610333 | | Unit Count | 1 Count | | Warranty Description | 6 MONTHS | ## Product Details - **Brand:** ELEGOO - **Item Weight:** 9.07 g - **Item dimensions L x W x H:** 0.59 x 1.77 x 1.18 inches - **Material:** Aluminum - **Maximum Supply Voltage:** 5 volts ## Images ![ELEGOO Ultrasonic Sensor - Image 1](https://m.media-amazon.com/images/I/61iQ2hmtWwL.jpg) ![ELEGOO Ultrasonic Sensor - Image 2](https://m.media-amazon.com/images/I/61tuwS1-UlL.jpg) ![ELEGOO Ultrasonic Sensor - Image 3](https://m.media-amazon.com/images/I/61mSb7ZbR2L.jpg) ![ELEGOO Ultrasonic Sensor - Image 4](https://m.media-amazon.com/images/I/510k3D-zGJL.jpg) ![ELEGOO Ultrasonic Sensor - Image 5](https://m.media-amazon.com/images/I/61LnBUyoNuL.jpg) ## Questions & Answers **Q: Do these things have to be plugged in?** A: I see from comments by others that I'm not the only one puzzled by your question. This device is a distance measuring sensor. As such, sensors need to be connected, or plugged into, other circuitry to make them work. In the case of the HC-SR04, it needs a signal, a pulse, from a circuit, Arduino microcontroller for example, to initial distance measurement and a circuit to receive the pulse signal from the HC-SR04 and do a time/distance calculation. Again an Arduino microcontoller. Is this all new to you? If so, there is a lot you will have to learn before you can use this device. There is plenty of help online however. **Q: Can you keep them on 24/7 without running to reliability issues? Any thoughts?** A: No, this module has no waterproof and temperature compensation function, you need to look for the prefessional one if you want to use it on 24/7. **Q: Will this work for a BeagleBone?** A: Can't say for sure, have only used these with Uno and Mega, work fine - note they have 4 pins (separate send/receive) as opposed to others with 3 pins (shared send/receive function). Great price - I've seen these sold for as much as $20 each. **Q: What are the measurements of one of these?** A: Google “SR04 dimensions” ## Customer Reviews ### ⭐⭐⭐⭐⭐ Measures distance to water accurately. I'm using it to caclulate bridge clearance. Works OUTSIDE! (in a plastic box) *by F***. on January 19, 2018* Complete project description follows but the keys for the Ultrasonic Distance Sensor: 1) it's been running in a plastic box, outside, for almost a month with no problem. The Arduino wakes us every 15 minutes and takes a measurement, transmits it, then goes back to sleep. 2) it is measuring the distance TO WATER! I even turned the swim jets in my pool on to test turbulence and it works fine. Green Pond Bridge Boat Clearance At ‘very low tide’ the clearance under Green Pond Bridge in Cape Cod is 6’6” or less and that is too low for the boat I use. The tide charts for Falmouth, MA are theoretical and can vary as much as 18” from what is actually happening at the bridge. This system monitors the clearance and transmits the information on the internet. All of these parts were purchased from Amazon. Transmitter An (Arduino) Elegoo UNO R3 board is connected to an Elegoo HC-SR04 Ultrasonic Distance Sensor. The UNO and the sensor calculate the distance from a fixed dock to the sea level, then transmit that data using a MakerFocus NRF24L01 Wireless Transceiver to the Receiver described below. The Transmitter sits on the end of a dock where there is no power, so the UNO, Transceiver and Distance Sensor are powered by the energyShield 2. This battery has special capabilities – it wakes everything up every 15 minutes. The system takes a couple readings of the distance to the water then transmits that data, then the battery shuts it all off. The data transmitted includes information from the battery – time, date, and voltage. I have been testing this unit at home (in Dallas) and it has been operating outside, for about 20 days. Based on battery drain it looks like it will operate for about 4-5 months before it needs a recharge. When the temperature drops below zero the system still works fine but the voltage reported in the battery seems low. All of this is housed in a plastic box printed for the purpose with a FlashForge 3d Printer Creator Pro, using eSun White ABS+ filament Picture below. Receiver An (Arduino) Elegoo MEGA 2560 R3 is connected to another NRF24 Transceiver to receive the data. The MEGA does the math to convert the distance from the dock to the water, to the bridge clearance. Then the information is displayed on an Elegoo UNO R3 Touch Screen (that also works fine on the Mega). Picture below. A small plastic frame for the Receiver was also printed on the 3d printer Web Server Finally, the information in the MEGA is transmitted over a serial bus to a Hiletgo ESP8266 NodeMCU ESP-12E Internet WIFI Development Board (Also operates using Arduino IDE programming). This board is connected to the MEGA via the XCSOURCE Logic Level Converter and powered by a UCEC MB102 Breadboard Power Supply Module. All mounted on an Elegoo Breadboard. The ESP8266 is programmed to be a web server. It connects to the internet through the modem/router provided by AT&T. Picture of my cell phone below. ### ⭐⭐⭐⭐⭐ Pretty reliable for short term harsh conditions. *by J***S on April 7, 2026* These have worked great for sensing water level. I have had it sitting at the top of a sealed tank with two holes just big enough for the sensors to fit. I DIYed an enclosure out of an old plastic case that some GRK screws came in. This is absolutely not the recommended way to use them, but have been receiving accurate measurements for the last ~3 weeks with a 15 second update interval running 24/7. ### ⭐⭐⭐⭐⭐ Very good for the price. *by T***O on July 22, 2026* These are decent inexpensive ultrasound detectors. I use them on my little robots to avoid obstacles. And on on stationary devices to detect motion. And they are fairly accurate less than a centimeter for nearby objects. They’re good out to about 200 cm’s. ## Frequently Bought Together - ELEGOO 5PCS HC-SR04 Ultrasonic Module Distance Sensor Compatible with Arduino UNO MEGA Nano Robot XBee ZigBee - ELEGOO 120pcs Multicolored Dupont Wire 40pin Male to Female, 40pin Male to Male, 40pin Female to Female Breadboard Jumper Ribbon Cables Kit Compatible with Arduino Projects - ELEGOO UNO R3 Board ATmega328P with USB Cable(Arduino-Compatible) for Arduino --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.be/products/25292147-elegoo-ultrasonic-sensor](https://www.desertcart.be/products/25292147-elegoo-ultrasonic-sensor) --- *Product available on Desertcart Belgium* *Store origin: BE* *Last updated: 2026-09-24*