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...
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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 power source is switched on during each repeating on/off cycle, usually given as a percentage. It is central to PWM (pulse-width modulation), where adjusting the duty cycle controls things like LED brightness, motor speed or heater power, and on devices such as proximity sensors it can also 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 is when a sensor or instrument adjusts its readings to reduce errors caused by changes in temperature. This matters because a sensor's raw output often drifts as conditions warm or cool, so compensation keeps readings more consistent and accurate over time.
- UART
- UART is a simple asynchronous serial interface that sends data over separate transmit and receive wires, usually labelled TX and RX, with both ends set to the same baud rate. It is a common way for microcontrollers and other serial devices to exchange data.
Find this product in
Supplier page — dfrobot.com
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Related Tutorials
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