Waterproof Ultrasonic Distance Sensor (21~600cm) V2.0

DFRobot Waterproof Ultrasonic Distance Sensor V2.0 delivers stable long‑range distance measurement for outdoor and harsh‑environment electronics projects. Unlike typical ultrasonic ranging modules that fail under rain or splashing water, this weather‑resistant ultrasonic measurement module integrates a sealed waterproof transducer designed for exposed installations. The upgraded sensing board also introduces built‑in temperature compensation and a wider 3.3–5V operating voltage range, enabling direct compatibility with controllers such as Arduino, ESP32 systems, and other embedded development platforms. Reliable ultrasonic ranging combined with improved environmental tolerance makes this waterproof distance sensor well suited for robotics, smart infrastructure, and outdoor monitoring projects.

Sealed Waterproof Ultrasonic Probe for Outdoor Deployment

This weatherproof ultrasonic sensing module integrates a fully sealed emitter designed to withstand rain, moisture, and dusty environments where standard open ultrasonic modules fail. The waterproof probe enables accurate distance detection in exposed installations such as parking systems, outdoor robotics, and security monitoring equipment. Rugged construction also protects internal electronics from environmental damage, ensuring stable operation in long‑term deployments where weather resistance and reliability remain critical.

Built‑in Temperature Compensation for Reliable Measurements

Environmental temperature changes significantly affect ultrasonic propagation speed. This upgraded ranging sensor integrates automatic temperature compensation to maintain consistent readings across changing weather conditions. The improved algorithm provides a defined accuracy of ±(1+S*0.5%) with a measurement resolution of 3 mm, allowing this environmental distance detection module to deliver more stable and predictable results compared with conventional ultrasonic sensors lacking compensation.

Wide Voltage Compatibility and Optimized Detection Geometry

An expanded operating voltage range of 3.3V–5V allows this ultrasonic ranging board to interface directly with modern 3.3V microcontrollers as well as traditional 5V development systems. The detection angle has been optimized to 60°, helping reduce interference from surrounding objects and improving measurement consistency in cluttered environments. A slimmer physical structure measuring 42 × 29 × 12 mm also simplifies installation within compact robotics or embedded sensing assemblies.

Figure: Waterproof ultrasonic sensor V2.0 version update

Reliable waterproof construction, improved sensing accuracy, and broad voltage compatibility make this ultrasonic distance measurement module suitable for automotive reversing assistance, outdoor robotics navigation, industrial inspection tools, security alarm triggers, and environmental monitoring systems requiring dependable non‑contact distance detection.

• Waterproof sealed ultrasonic probe for outdoor use
• Built-in temperature compensation for improved measurement stability
• Wide operating voltage: 3.3V–5V compatible with multiple microcontrollers
• High measurement resolution of 3mm
• Optimized 60° detection angle reduces side interference
• Long detection range from 24cm to 500cm
• Compact structure with slim profile design
• Suitable for harsh environments and outdoor installations

• Operating Voltage: DC 3.3-5V
• Quiet Current: 8mA
• Working Current: 40mA
• Detection Range: 24cm ~ 500cm
• Accuracy: ±(1+S*0.5%)
• Resolution: 3mm
• Detecting Angle: 60°
• Temperature Compensation: Yes
• Working Temp: -20 ~ 70°C
• Size: 42 * 29 * 12 mm
• Working Frequency: 40KHz

• Water-proof Ultrasonic Sensor x1

• Automotive reversing distance detection
• Outdoor robotics obstacle avoidance
• Security alarm distance triggering systems
• Industrial distance inspection equipment
• Environmental monitoring installations