DFRobot
Water-proof Ultrasonic Sensor (ULS)
A high-performance waterproof ultrasonic distance sensor with an enclosed probe, capable of measuring distances from 270 mm to 8000 mm. Based on ultrasonic e...
A high-performance waterproof ultrasonic distance sensor with an enclosed probe, capable of measuring distances from 270 mm to 8000 mm. Based on ultrasonic echo ranging, it determines distance by measuring the time between sending a pulse and receiving the echo — no physical contact required.
Suitable for detecting a wide range of materials including transparent objects, metals, non-metals, liquids, solids, and powders. The bell-mouth shell design improves directivity and output stability.
Key Features
- Waterproof Probe – Enclosed design for outdoor and wet environments
- 3.3–12 V Supply – Wide operating voltage range with low power consumption (~5 mA average at 5 V)
- 270–8000 mm Range – 270 mm blind zone, up to 8 m maximum detection
- 1 mm Resolution – High-precision distance measurement
- Multiple Output Modes – Serial (UART), PWM, and switch output
- Temperature Compensation – Built-in temperature output and compensation for accurate readings
- 40 kHz Centre Frequency – Standard ultrasonic operating frequency
Specifications
- Operating Temperature – −15°C to 60°C
- Storage Temperature – −25°C to 80°C
- Operating Current – Average 5 mA (at 5 V, 250 ms duty cycle)
Resources
- Product Wiki (wiring diagrams, Arduino examples, output mode configuration)
Jargon buster
Plain-language definitions for the technical terms used above.
- duty cycle
- The fraction of time a signal or light source is switched on during a repeating cycle. On a proximity sensor, changing the duty cycle can affect detection range, response speed, accuracy and power use.
- PWM
- Pulse Width Modulation is a way for a digital pin to simulate variable output power by switching on and off very quickly. It matters for controlling things like LED brightness, motor speed, or servo-style signals from a microcontroller pin.
- Temperature compensation
- Temperature compensation means the sensor adjusts its readings to reduce errors caused by changes in water temperature. This matters for field monitoring because ponds, rivers, and tanks can vary in temperature throughout the day and across seasons.
- UART
- UART is a simple serial connection that sends data over separate transmit and receive wires, often labelled TX and RX. It matters because this module is designed to replace a wired UART cable with a wireless link while keeping the same serial data format.
Find this product in
Supplier page — dfrobot.com
Supplier Description · 342.9 KB · Click any page to view full size
Related Tutorials
Free guides on learn.littlebird.com.au
