DFRobot A01NYUB Waterproof Ultrasonic Distance Sensor (28-750cm Detection Range)

DFRobot A01NYUB Waterproof Ultrasonic Distance Sensor (28750 cm) Technical Information

Overview

The DFRobot A01NYUB ultrasonic distance sensor is a waterproof ultrasonic ranging module designed for long-distance measurement in harsh environments.

• Measures:

  • Distance (non-contact)

   

• Detection range:

  • 28 cm to 750 cm (0.28 m to 7.5 m)

   

• Output:

  • UART serial data

   

It is optimized for outdoor and industrial distance sensing applications.

Working Principle

Ultrasonic Time-of-Flight (ToF)

The sensor operates using the ultrasonic time of flight principle:

1. Ultrasonic Emission

• Sensp

2. Reflection from Object

• Sound waves hit an object and reflect back

3. Time Measurement

• Sensor measures time taken for echo to return

4. Distance Calculation

Distance=v't2\text{Distance} = \frac{v \times t}{2}Distance=2v't

Where:

• vvv = speed of sound (~343 m/s)

• ttt = time delay

Division by 2 accounts for round-trip travel.

Measurement Characteristics

• Range: 28 cm to 750 cm

• Accuracy: ~1% (typical)

• Resolution: ~1 mm (effective resolution varies)

Detection Features

• Stable long-range measurement

• Good performance in:

  • Dusty

  • Wet

  • Outdoor environments

    l

  • Supply voltage: 3.3V to 5V

  • Current consumption: low (typical tens of mA during operation)

   

  Output Interface

  UART Serial Output

  • Provides distance data in digital format

  • No need for timing measurement by microcontroller

   

  Data Format

  • Sends distance continuously or on request

  • Easy integration with microcontrollers

   

  Internal Features

  Waterproof Transducer

  • Fully sealed ultrasonic probe

  • Suitable for:

    • Wet environments

    • Outdoor installations

     

   

  Built-in Signal Processing

  • Handles:

    • Echo detection

    • Noise filtering

    • Distance calculation

     

  Temperature Compensation (Basic)

  • Improvesul

    Wide Beam Angle

    • Detects objects within a broad sensing area

    Operating Behavior

    Continuous Measurement

    • Outputs distance data periodically

    Non-Contact Sensing

    • No physical contact required

    • Safe for moving or sensitive objects

     

    Environmental Robustness

    • Works in:

      • Rain

      • Dust

      • Humid environments

       

    Environmental Characteristics

    • Waterproof design (probe level)

    • Suitable for outdoor use

    • Performance affected by:

      • Temperature (affects sound speed)

      • Soft/absorbing surfaces (weak reflections)

       

     

    Limitations

    • Minimum range:

      • Cannot detect objects closer than ~28 cm

        • Air temperature

        • Wind

        • Surface texture

      • Not ideal for:

        • Very small or angled objects

      Typical Pin Configuration

      • VCC Power supply

      • GND Ground

      • TX Serial data output

      • RX Serial input (optional control)

      Functional Role

      The module acts as a:

      • Distance measurement sensor

      • Level detection sensor (e.g., water tanks)

      • Obstacle detection device

      Summary

      The DFRobot A01NYUB Ultrasonic Sensor is a rugged, waterproof distance sensing solution that:

      • Uses ultrasonic time-of-flight technologyrom 28 cm to 7.5 m

      • Provides UART digital output

      • Works reliably in harsh and outdoor environments

      • Is ideal for non-contact level and distance measurement systems