--- product_id: 510391161 title: "Radiolink SU04 Ultrasonic Sensor Range Finder Obstacle Avoidance for Helicopter, Multirotor, Airplane, Car, and Boat, Compatible with PIXHAWK, Radiolink Mini PIX and crossflight" brand: "radiolink" price: "$104.46" currency: USD in_stock: true url: https://www.desertcart.us/products/510391161-radiolink-su04-ultrasonic-sensor-range-finder-obstacle-avoidance-for-helicopter store_origin: US region: United States of America --- # 30ms lightning-fast response 0.4cm ultra-precise detection 8-directional obstacle avoidance Radiolink SU04 Ultrasonic Sensor Range Finder Obstacle Avoidance for Helicopter, Multirotor, Airplane, Car, and Boat, Compatible with PIXHAWK, Radiolink Mini PIX and crossflight **Brand:** radiolink **Price:** $104.46 **Availability:** ✅ In Stock ## Summary > 🛡️ Elevate your drone’s IQ with SU04’s smart, swift obstacle defense! ## Quick Answers - **What is this?** Radiolink SU04 Ultrasonic Sensor Range Finder Obstacle Avoidance for Helicopter, Multirotor, Airplane, Car, and Boat, Compatible with PIXHAWK, Radiolink Mini PIX and crossflight by radiolink - **How much does it cost?** $104.46 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/510391161-radiolink-su04-ultrasonic-sensor-range-finder-obstacle-avoidance-for-helicopter) ## Best For - radiolink enthusiasts ## Why This Product - Trusted radiolink brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Rapid Reaction:** Ultra-low 30ms latency ensures instant obstacle response—no delays, no crashes. - • **All-Terrain Safety:** Reliable obstacle avoidance in 8 directions plus altitude hold for confident flights and drives. - • **Compact Powerhouse:** Weighs just 8g and fits seamlessly on drones, cars, boats, and more. - • **Pinpoint Precision:** Detects obstacles as small as 0.4cm for flawless navigation. - • **Versatile Compatibility:** Plug & play with PIXHAWK, Radiolink Mini PIX, and Crossflight controllers via I2C/MAVLink. ## Overview The Radiolink SU04 Ultrasonic Sensor is a compact, high-precision obstacle avoidance device designed for drones, RC vehicles, and boats. Featuring 0.4cm detection accuracy and a rapid 30ms response time, it provides 8-directional sensing and altitude hold capabilities. Compatible with popular flight controllers like PIXHAWK and Radiolink Mini PIX, it ensures safer autonomous navigation across agriculture, training, and rescue applications. ## Description Radiolink is a high technology manufacturing company dedicated to researching, manufacturing and marketing of RC model radio transmitters. We are committed to providing customers with a high reliability and high performance product solution, as well as providing technical support and friendly after-sales service. How to connect: 1.Require your PIXHAWK is version 3.5 or later version when you will use automatic obstacle avoidance function. 2.Use the 6pin wire connect the Ultrasonic Sensor SU04 insert to the TELEM1 or TELEM2 port of PIX. Please Note: 1.Automatic obstacle avoidance function asks the firmware of PIXHAWK is version 3.5 or later version. 2.The flight controller cannot identify the detection distance when the sensor is far from the obstacle more than 450cm, it will altitude hold by barometer. 3.PIXHAWK have to powered by LiPo battery, it cannot power by USB when you use this utrasonic sensor SU04. 4.When you ready for the first flight, please make your drone at a lower speed to keep the safe flight. 5.please reconnect the PIXHAWK and reopen the MP after all the parameters setup as all the above steps. Obstacle Sensor Specifications: Size: 20*22*19mm Weight: 8g(include wires) Input Voltage: 4.5~5.5V(No high voltage) Current: 18mA@5v Transmit Rate: 90mA Working Temperature: -20°~80° Detection Range: 40cm~450cm Detection Accuracy: 0.4CM Detection Frequency: 40+-1.0KHz Output: I2C/Mavlink ## Features - 【Obstacle Avoidance】: SU04 is a transmitting and receiving hybrid ultrasonic sensor, it will help helicopter, multirotor, airplane, car, and boat achieve autonomous obstacle avoidance in 8 directions horizontal, obstacle avoidance to the upward side and altitude hold to the downward. - 【Small Size and Multifunction】: Single probe only 0.017Lb and 0.78*0.86*0.75in, easy to install on your drone. Obstacle avoidance function can protect your device when the beginner practice fly. - 【Perfect for】: SU04 ultrasonic sensor can be used on Agriculture, Training, and rescue. Safety Guaranteed for Outdoors Operation and Training. Can work with Helicopter, Multirotor, Airplane, Car, and Boat. - 【High Accuracy and Low Latency】: Support 0.4cm high detection accuracy, even the smallest obstacles can be accurately captured. Precise positioning without fear of obstacles. Extreme Fast Response, latency as low as 30ms. - 【Compatible Mode】: SU04 is compatible with RadioLink flight controller PIXHAWK, MINPIX and TURBO PIX with the I2C and UART(MAVlink protocol) automatically identified. ## Technical Specifications | Specification | Value | |---------------|-------| | Asin | B0BTHLGRYF | | Best Sellers Rank | #258,715 in Toys (See Top 100 in Toys) #349 in Remote- & App-Controlled Helicopters | | Brand Name | Radiolink | | Current Rating | 18 Milliamps | | Customer Reviews | 5.0 5.0 out of 5 stars (1) 5.0 out of 5 stars | | Included Components | ultrasonic sensor | | Item Dimensions | 20 x 19 x 22 millimeters | | Item Type Name | Ultrasonic Sensor | | Item Weight | 8 Grams | | Manufacturer | Radiolink | | Material Type | Plastic | | Maximum Supply Voltage | 5.5 Volts | | Measurement Accuracy | 0.4 cm | | Measuring Range | 40cm to 450cm | | Model | SU04 | | Mounting Type | Flange Mount | | Number Of Items | 1 | | Output Type | Digital | | Part Number | SU04 | | Response Time | 30 Milliseconds | | Sensing Distance | 450 Centimeters | | Specific Uses For Product | agriculture, training, rescue | | Style Name | ultrasonic sensor | ## Product Details - **Brand:** Radiolink - **Item dimensions L x W x H:** 20 x 19 x 22 millimeters - **Item weight:** 8 Grams - **Material:** Plastic - **Style:** ultrasonic sensor ## Images ![Radiolink SU04 Ultrasonic Sensor Range Finder Obstacle Avoidance for Helicopter, Multirotor, Airplane, Car, and Boat, Compatible with PIXHAWK, Radiolink Mini PIX and crossflight - Image 1](https://m.media-amazon.com/images/I/61r1dsfY1XL.jpg) ![Radiolink SU04 Ultrasonic Sensor Range Finder Obstacle Avoidance for Helicopter, Multirotor, Airplane, Car, and Boat, Compatible with PIXHAWK, Radiolink Mini PIX and crossflight - Image 2](https://m.media-amazon.com/images/I/71PuPuvyIqL.jpg) ![Radiolink SU04 Ultrasonic Sensor Range Finder Obstacle Avoidance for Helicopter, Multirotor, Airplane, Car, and Boat, Compatible with PIXHAWK, Radiolink Mini PIX and crossflight - Image 3](https://m.media-amazon.com/images/I/616rah1-3VL.jpg) ![Radiolink SU04 Ultrasonic Sensor Range Finder Obstacle Avoidance for Helicopter, Multirotor, Airplane, Car, and Boat, Compatible with PIXHAWK, Radiolink Mini PIX and crossflight - Image 4](https://m.media-amazon.com/images/I/61pyXV7j-YL.jpg) ![Radiolink SU04 Ultrasonic Sensor Range Finder Obstacle Avoidance for Helicopter, Multirotor, Airplane, Car, and Boat, Compatible with PIXHAWK, Radiolink Mini PIX and crossflight - Image 5](https://m.media-amazon.com/images/I/61G-pdD4emL.jpg) --- ## 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.us/products/510391161-radiolink-su04-ultrasonic-sensor-range-finder-obstacle-avoidance-for-helicopter](https://www.desertcart.us/products/510391161-radiolink-su04-ultrasonic-sensor-range-finder-obstacle-avoidance-for-helicopter) --- *Product available on Desertcart United States of America* *Store origin: US* *Last updated: 2026-08-23*