Description
Reviews
| Brand | - |
| Category | Robotics / STEM Teaching Tools / Sensors |
| Origin | - |
| Model Number | AJ-SR04M K |
| Sensor Type | Ultrasonic Ranging |
| Operating Voltage | 5V DC |
| Detection Range | 2cm - 450cm |
| Beam Angle | 15 degrees |
| Interface Type | Square Wave Output |
| Waterproof Rating | IP67 |
| Transducer Count | Dual-Head Integrated |
| Operating Temperature | -20°C to 70°C |
| Application | Reverse Parking Radar, Obstacle Avoidance |
Anonymous
Mar 29, 2026
Rating: 5/5
Reliable in all weather
I installed this on my garden cart to avoid hitting walls. It has survived rain, snow, and direct sunlight without any issues. The IP67 rating is no joke. Great build quality.
Anonymous
Mar 15, 2026
Rating: 5/5
Perfect for my DIY parking sensor project
This dual-head module worked flawlessly with my Arduino setup. The waterproof casing is robust, and the square wave output is very stable even in rainy conditions. Highly recommended for automotive projects.
Anonymous
Mar 08, 2026
Rating: 5/5
Excellent value for money
Compared to other ultrasonic sensors I've bought, this integrated dual-head version saves so much wiring time. The signal is clean and consistent. Will be buying more for my robotics club.
Anonymous
Mar 08, 2026
Rating: 5/5
Great for obstacle avoidance robots
Using this on a small delivery robot prototype. The dual heads provide a wider coverage area than single sensors. Very happy with the precision and durability.
Anonymous
Mar 01, 2026
Rating: 4/5
Works as described
Solid performance for a parking radar application. The response time is quick enough for real-time feedback. Just make sure your microcontroller can handle the square wave frequency correctly.
Anonymous
Mar 01, 2026
Rating: 4/5
Good range, easy to integrate
The detection range is accurate up to about 4 meters which is plenty for reverse parking. Integration was straightforward using the provided pinout diagram. One star off because the mounting brackets are sold separately.
Q: Can this module be directly connected to a 12V car battery?
A: No, the AJ-SR04M K operates at 5V DC. You must use a voltage regulator or step-down converter if connecting to a 12V automotive system to prevent damage.
Q: Is the output signal compatible with Raspberry Pi GPIO?
A: Yes, but since the Raspberry Pi GPIO is 3.3V logic and the sensor outputs 5V square waves, we recommend using a logic level converter to ensure safe operation.
Q: What is the exact distance between the two ultrasonic heads?
A: The center-to-center distance between the dual transducers is approximately 25mm, optimized for standard vehicle bumper installations.
Q: How do I clean the sensor if it gets muddy?
A: Due to its IP67 waterproof rating, you can simply rinse the sensor face with water or wipe it gently with a soft cloth. Avoid using harsh chemical solvents.
Q: Does this come with wiring harnesses included?
A: The package includes the sensor module and a short pigtail connector. Extended wiring harnesses are available separately in our accessories section.
304 Stainless Steel Chain, Thickened Industrial Seamless Short/Long Link Chain for Lifting, Swing, or Dog Leash
$1.50
Large Bucket 502 Glue, Strong Instant Adhesive, Gold Material 502 Dry Glue for Leather, Metal, Furniture, and Plastic Bonding by Manufacturer
$1,893.00
Rectangular Plastic Vegetable Planter for Balcony - Durable Home Gardening Pot
$12.90
Chinese Painting Line Drawing Copybook, Gongbi Sketch Template, Large-Scale Tracing Album, Ancient Style Brush Control and Line Practice Book
$7.48
German Continental Tires 225/45R17 Run-Flat, 19-Inch Original Authentic with Full Tread Patterns
$380.00
Dynamic Sheet Music Simplified Notation Accompaniment for Electric Wind Instrument Saxophone Hulusi Ocarina Flute Bamboo Flute
$10.00
LL Industrial Lint-free Wiping Paper - Oil and Water Absorbent Non-woven Fabric (White/Blue Large Roll)
$185.82
Continental Quiet Used Car Tires 225/235/245/255/265-35/40/45/50 R17/18/19/20/21/22/23
$284.00
Negotiable Price: Siemens Load Cell 7mh4106-5ec11, Brand New Unused, Contact for Price Negotiation
$1,332.00
Premium Over-Toilet Storage Organizer, Wall-Mounted Bathroom Shelf, No Drilling Required, Multi-Function Toilet Rack
$31.76
Model 2000 Large Commercial Vegetable Cutter for Slicing, Dicing, and Cutting Leafy Greens and Kimchi
$11,000.00
Aromatherapy Candle Tool Set - Includes Igniter, Snuffer, Wick Trimmer, Flame Extinguisher Cover, and Rotating Carousel Ornament
$2.55
onlycook 304 Stainless Steel Kitchen Rack with Narrow Edge for Sink, Dishcloth Drainer, and Sponge Basket
$36.50
7-Piece Square Succulent Pot Set with Trays - Durable Plastic Colorful Root-Control Planters
$75.50
Minimalist Japanese Style Kitchen Sponge Brush Dish Soap Drain Rack Air-Dry Cloth Rack Sink Organizer Box
$21.00
PVC Cable Cover Speed Bump Style Wire Protector for Indoor Cables and Pipes
$9.10
Spiegel BGF-161 Portable Tire Stone Removal Hook - Multi-function Tool for Cleaning Car Tire Treads
$7.84
7A Natural Amethyst Purple Rabbit Hair Loose Beads for Women's DIY Bracelets and Snowflake Necklaces
$3.83
DIY Handmade Soap Silicone Mold, Essential Oil Soap, Creative Gift Soap Base and Aromatherapy Materials, Love Forever Design
$12.90
Flameless Aromatherapy Diffuser with Essential Oils, Dried Flowers, and Preserved Flower Decor
$13.60
DOUBLECOIN 7.00R16LT-14 (RSS2) All-Steel Radial Truck Tire - Economical and Wear-Resistant
$1,375.00
Tactical Laser Flashlight, Super Bright Rechargeable Mini Portable Light for Outdoor Long-Range Use, Home Multi-Function Zoom
$339.22
![MOOCAT [Polaroid Style] Hand-drawn Blank Irregular Wood Pulp Fine-grain Paper for Cyanotype, Street Vending, and Art Projects](https://www.gosteppe.com/cache/small/product/270441/legacy-main-3390792413846e9dfc410750.webp)
MOOCAT [Polaroid Style] Hand-drawn Blank Irregular Wood Pulp Fine-grain Paper for Cyanotype, Street Vending, and Art Projects
$11.90
New Pearl Mini Watercolor Solid Set – Portable Travel Sketchbook & Palette Kit for Students, 12 Colors with Magnetic Transparent Case
$5.78
Natural Cream-Body Green Rutilated Quartz Loose Beads - DIY Handmade Beading Accessories including Spacer Beads and Multi-Gem Bracelet Components
$5.25
Fresh Milk Beverage Production Equipment – Small Pasteurization Tank & Fermented Liquid Yogurt Tank
$6,580.00
Mold Mirror Polishing Cloth - Removes Material Marks, Available in Red, Yellow, White; Self-Adhesive Velvet for High-Gloss Mirror Finishing
$21.60
High Borosilicate Glass Cup, DIY Scented Candle Transparent Round Cup, Soy Wax Jelly Cup, Wax Molding Empty Container
$2.38
Natural Aquamarine Black Flash Loose Beads for DIY Handmade Jewelry, Stringing Beads, and Round Beads
$0.88
Touchmark Watercolor Sketchbook for Acrylic Markers and Colored Pencils, Mini Portable Pocket Painting Book for Children and Outdoor Sketching
$6.74
![[Youxin Electronics] GP2Y0E03 Infrared Distance Sensor Module 4-50cm Range](https://www.gosteppe.com/cache/medium/product/74667/legacy-main-4da8cadc5fc82afe91b124e3.webp)
![[Trial Pack] Xianlang Complete Cat Treat Sticks Meal Packs Main Course Cans Freeze-Dried Cat Food Sample Snacks Gift Set](https://www.gosteppe.com/cache/medium/product/208273/legacy-main-9ec245ebf781f65a434ba854.webp)
