--- product_id: 141561736 title: "Excelity 3pcs Ultrasonic Module HC-SR04 Distance Sensor with 3pcs Mounting Bracket" brand: "eiks" price: "£8.47" currency: GBP in_stock: true reviews_count: 8 url: https://www.desertcart.co.uk/products/141561736-excelity-3pcs-ultrasonic-module-hc-sr04-distance-sensor-with-3pcs store_origin: GB region: United Kingdom --- # Power Supply: 5V DC Detection Range: 2cm-450cm Universal Compatibility: Microcontroller Ready Excelity 3pcs Ultrasonic Module HC-SR04 Distance Sensor with 3pcs Mounting Bracket **Brand:** eiks **Price:** £8.47 **Availability:** ✅ In Stock ## Summary > 🚀 Measure with Precision, Innovate with Ease! ## Quick Answers - **What is this?** Excelity 3pcs Ultrasonic Module HC-SR04 Distance Sensor with 3pcs Mounting Bracket by eiks - **How much does it cost?** £8.47 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.uk](https://www.desertcart.co.uk/products/141561736-excelity-3pcs-ultrasonic-module-hc-sr04-distance-sensor-with-3pcs) ## Best For - eiks enthusiasts ## Why This Product - Trusted eiks brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Easy Installation:** Includes 3 mounting brackets for hassle-free setup. - • **Efficient Power Usage:** Low quiescent current of <2mA ensures energy efficiency. - • **Precision Measurement:** Achieve accurate distance readings with a resolution of 0.3 cm. - • **Versatile Compatibility:** Works seamlessly with popular microcontrollers like 8051 and AVR. - • **Innovative Ultrasonic Technology:** Utilizes advanced ultrasonic pulses for reliable distance detection. ## Overview The Excelity 3pcs Ultrasonic Module HC-SR04 Distance Sensor set includes three high-performance distance measurement modules and three mounting brackets, designed for easy installation and universal compatibility with microcontrollers. With a detection range of 2cm to 450cm and a resolution of 0.3cm, this sensor is perfect for a variety of applications, ensuring accurate and efficient distance measurement. ## Description Excelity HC-SR04 Ultrasonic Moudle is to measure the distance of object by 40KHz ultrasonic sound wave. This moulde provides 2cm-400cm non-contact measurement function, the ranging accuracy can reach to 3mm. It is great for the project that need distance measurement, such as Distometer,intelligent robot navigation system,etc. Module main technical parameters: -Working Voltage : 5V(DC) -Static current: Less than 2mA -Output signal: Electric frequency signal, high level 5V, low level 0V -Sensor angle: Not more than 15 degrees -Detection distance: 2cm-450cm. -High precision: Up to 0.3cm -Input trigger signal: 10us TTL impulse -Echo signal : output TTL PWL signal Pin definition: -VCC: connect to 5V DC -Trig(T): control pin, connect to a standard I/O port -Echo(R):receiving end, connect to a standard I/O port -GND: Connect to Ground Notes: -1. The module should be inserted in the circuit before been powered to avoid producing high level of misoperation; if producted, power it again. -2. Before connect to VCC terminal, the GND terminal should be connected the module first,otherwise,it will affect the normal work of the module. Module Working Principle: -1. Pull the Trig pin to high level for more than 10us impulse, the module start ranging. -2. The module automatically sends eight 40KHz square wave to detect whether a signal is returned. -3. Finished ranging, If you find an object in front, Echo pin will be high level, and based on the different distance, it will take the different duration of high level. -4. Calculated the distance, the distance = (high level time * sound velocity (340M/S) / 2. Package included: -3pcs HC-SR04 Moulde -3pcs Mounting Bracket ## Features - [PACKAGE INCLUDED] 3pcs HC-SR04 distance measurement module & 3pcs mounting bracket for installation - [FEATURE] These module is for distance measuring transducer that working with ultrasonic, they consist of ultrasonic transmitter, receiver, and control circui - [FUNCTIONAL PARAMETER] Effectual Angle: <15 degree ; Detection Distance : 2cm~450 cm ; Resolution : 0.3 cm. Power Supply : 5V DC ; Quiescent Current : <2mA ; - [UNIVERSAL COMPATIBILITY] Built in standard interface that can be controlled directly by microcontroller，such as 8051, AVR - [WORKING PRINCIPLE] Using IO trigger for at least 10us high level signal, when triggered it sends out a series of 40KHz ultrasonic pulses and receives echo from an object, the duration of the signal is the time from sending ultrasonic to returning.The distance = (duration time * sound velocity (340M/S) / 2 ## Images ![Excelity 3pcs Ultrasonic Module HC-SR04 Distance Sensor with 3pcs Mounting Bracket - Image 1](https://m.media-amazon.com/images/I/81omqfv9w0L.jpg) ![Excelity 3pcs Ultrasonic Module HC-SR04 Distance Sensor with 3pcs Mounting Bracket - Image 2](https://m.media-amazon.com/images/I/71c5FTdfVOL.jpg) ![Excelity 3pcs Ultrasonic Module HC-SR04 Distance Sensor with 3pcs Mounting Bracket - Image 3](https://m.media-amazon.com/images/I/71sZ652ArLL.jpg) ![Excelity 3pcs Ultrasonic Module HC-SR04 Distance Sensor with 3pcs Mounting Bracket - Image 4](https://m.media-amazon.com/images/I/71DSDoS8lDL.jpg) ![Excelity 3pcs Ultrasonic Module HC-SR04 Distance Sensor with 3pcs Mounting Bracket - Image 5](https://m.media-amazon.com/images/I/71Rm6ALetIL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Typical HC-SR04 sensor *by A***L on Reviewed in the United States 🇺🇸 on March 25, 2021* I bought these devices as replacements for a robotic car (Picar-X) which also came with an HC-SR04. However none of these devices worked in this application - it turns the Picar-X delivers 3.3V to the HC-SR04 where every HC-SR04 device I've encountered run at 5V. Apparently the makers of Picar-X use a 3.3V variant or perhaps they modified a stock HC-SR04.Subsequently I attached each sensor in turn to my raspberry pi (running the Bluetin_Echo library) and found all three devices worked perfectly.Important to note the pi gpio pins work at 3.3V whereas the HC-SR04 works at 5V so be sure to use a resistor step-down on the 'echo' output going from the HC-SRO4 into the pi gpio pin (the 'trigger' input works fine at 3.3V).The HC-SR04 generates a return pulse (on the echo pin) whose width is proportional to the measured distance. Determining the length of this pulse can be problematic because the pulse width is measured in mere micro-seconds. Computers such as the Raspberry P, running a relatively sophisticated operating system, are not optimized for high-accuracy timed interval measurements. So you should expect to see jitter and the occasional false reading.If you want a more accurate and more consistent sensor, consider devices which return numeric distance values across RS232 TTL or I2C bus (such as the HRLV-MaxSonar-EZ1).Okay, so the sensor were all good and worked fine. The plastic frames aligned perfectly with the transponders and are an easy slip-on fit. I used a dab of epoxy to secure the sensor to the frame.These devices are dependent on the speed of sound which varies with temperature. You need to be aware of this limitation which is shared by all (non-compensated) ultrasonic transducers. I typically calibrate and map these devices over a range of distances (in software) and use a temperature sensor to adjust for the prevailing speed of sound. Even so, these aren't super accurate devices. However they are excellent value for money and for simple robotics are highly effective. For more sophisticated robots I use stereo cameras and lidar - neither of which are cheap!For the Raspberry Pi I used the Bluetin_Echo library to run the HC-SRO4. Effortless solution.So, overall I consider this was a good buy and I'm a satisfied customer. ### ⭐⭐⭐⭐ Easy to use! *by C***S on Reviewed in the United States 🇺🇸 on February 8, 2023* I used this on a robot to create a distance feedback loop and it worked perfectly when the system was steady. During calibration (with the system being still) the measurements retrieved from the sensor were identical to the measurements taken in person with a ruler. However, once the mechanical system started up, the measurements were a little off and sometime it would turn off while it steadied itself again. This was an easy thing to fix by writing into the code lines with a significant range of distance rather than targetting precise measurements for the system to work.TLDR: Great for systems with little to no vibrations, otherwise you might have to play around with it to make it work, but not impossible. ### ⭐⭐⭐⭐ Bueno *by J***E on Reviewed in the United States 🇺🇸 on December 4, 2022* Buena inversión --- ## 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.co.uk/products/141561736-excelity-3pcs-ultrasonic-module-hc-sr04-distance-sensor-with-3pcs](https://www.desertcart.co.uk/products/141561736-excelity-3pcs-ultrasonic-module-hc-sr04-distance-sensor-with-3pcs) --- *Product available on Desertcart United Kingdom* *Store origin: GB* *Last updated: 2026-05-24*