The A0221AU / A02YYUW Waterproof Ultrasonic Distance Sensor (3~450cm, UART, IP67) is a high-performance, commercial-grade sensor designed for accurate distance measurement in challenging environments. With a wide detection range of 3cm to 450cm, this sensor features a significantly reduced blind zone, broad sensing angle, and strong penetration capabilities through smog and dust. Its IP67 waterproof housing ensures durability and reliability for outdoor and industrial applications. Using a UART interface, it integrates easily with Arduino, Raspberry Pi, and other microcontrollers, making it ideal for robotics, automation, level monitoring, and security systems. Featured By RoboticsBD.
Product Images are shown for illustrative purposes only and may differ from the actual product.
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Features:
Wide Measurement Range: Accurately detects objects between 3cm to 450cm.
IP67 Waterproof Design: Works reliably in outdoor and harsh environments.
UART Communication: Easy connection with microcontrollers and embedded systems.
Reduced Blind Zone: Provides more accurate close-range detection.
Wide Sensing Angle: Detects objects effectively in a broader area.
Environmental Penetration: Functions in smog, dust, or mist for dependable results.
High Reliability: Designed for long-term stable operation in commercial applications.
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Applications:
Robotics – Obstacle detection and navigation.
Industrial Automation – Level detection and distance monitoring.
Smart Agriculture – Liquid or grain level sensing in tanks and silos.
Parking Systems – Vehicle detection and range measurement.
Security Systems – Intrusion detection and perimeter monitoring.
Weather Stations – Reliable performance in outdoor sensing applications.
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| General Specifications |
| Model | A0221AU / A02YYUW |
| Measuring Range | 3cm – 450cm |
| Communication Interface | UART |
| Waterproof Rating | IP67 |
| Blind Zone | Smaller than conventional sensors |
| Sensing Angle | Wide angle detection |
| Penetration Ability | Works in smog, dust, mist |
| Applications | Robotics, industrial, automotive, outdoor sensing |
| Shipment Weight | 0.0464 kg |
| Shipment Dimensions | 10 × 12 × 3 cm |
Please allow 5% measuring deviation due to manual measurement.
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Documentation:
INTRODUCTION
Ultrasonic distance sensor determines the distance to a target by measuring time lapses between the sending and receiving of the ultrasonic pulse. This is an easy-to-use commercial-grade ultrasonic sensor module of high performance and reliability, featuring much smaller blind zone, wider sensing angle and a certain penetration power(smog, dust) compared with other similar sensors .
Connection with Arduino
The ultrasonic sensor adopts closed separated probe, waterproof and dustproof, which could be well suitable for harsh and moist measuring environment. All the signal processing units are integrated inside the module, so users can directly obtain the distance value through Asynchronous Serial Interface. With 9600bit/s band rate, the sensor can easily communicate with upper-host or other MCU, which greatly shortens the developing cycle for users.
Connection with Raspberry Pi
Use the sensor with Arduino controller to build up your projects, such as backing car annunciator, obstacle avoidance robot, object approaching detection etc.
Beam Directionalities Diagram
Dimension Diagram
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Package Includes:
1 x A0221AU / A02YYUW Waterproof Ultrasonic Distance Sensor (3~450cm, UART, IP67)
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