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A02YYUW Waterproof Ultrasonic Distance Sensor

SKU: SEN0311

The A02YYUW Waterproof Ultrasonic Distance Sensor measures target distance via ultrasonic pulse time lapses. It offers a 4.5m range, supports 3.3~5V wide voltage, and uses only 8mA average current (powerable by most controllers’ IO ports). Its closed separated probe is waterproof/dustproof, suitable for harsh environments. Integrated signal processing allows direct distance reading via 9600bps UART. Compatible with Arduino, Raspberry Pi, it’s ideal for backing car annunciators, obstacle avoidance robots, and object detection projects.

Angled shot of waterproof ultrasonic distance sensor with wire and label.-DFRobot product sku:SEN0311 image.
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    • Specification

    Parameter Value
    Operating Voltage 3.3~5V
    Standby Current ≤5mA
    Average Current ≤8mA
    Blind Zone Distance 3cm
    Ranging Distance for Flat Object 3-450cm
    Output UART
    Response Time 100ms
    Probe Center Frequency 40K±1.0K
    Operating Temperature -15~60℃
    Storage Temperature -25~80℃
    Sensing Angle 60°
    Protection Rate IP67

    Pinout

    SEN0311 Pinout
    Label Name Description
    1 VCC Power Input
    2 GND Ground
    3 RX Processed Value/Real-time Value Output Selection
    4 TX UART Output

    FAQ

    • What environmental factors can affect the performance of ultrasonic sensors?

      Fluctuations in temperature can affect the speed of sound waves in an ultrasonic sensor. As temperature increases, the speed of sound waves also increases. While the target may not have moved, the sensor may detect it as being closer due to this increase in speed. In addition, airflow caused by pneumatic equipment or fans may deflect or disrupt the path of ultrasonic waves, which could lead to the sensor failing to recognize the correct position of the target.

    • Can ultrasonic sensor detect human beings?

      Yes. Ultrasonic sensors can emit ultrasonic waves and detect surrounding objects, including people, by receiving the reflected sound waves.

    • Can ultrasonic detection work underwater?

      Yes. The speed of ultrasonic waves propagating in water is faster compared to that in air. Therefore, the use of ultrasonic sensors in underwater applications is feasible. In fact, many underwater measurement applications rely on ultrasonic sensors for distance measurement and object detection, such as underwater mapping, underwater robots, and underwater pipeline inspection.

    • Will an ultrasonic sensor detect objects on a rainy day?

      The ultrasonic sensor is hardly affected by any environmental conditions, including smoky or rainy environments. However, if you want to use the ultrasonic ranging sensor outdoors for a long time, it is recommended to choose a waterproof ultrasonic sensor, such as the A02YYUW waterproof ultrasonic sensor (SEN0311) or the waterproof ultrasonic ranging module (SEN0207).

    • What is the detection range of the ultrasonic sensor?

      The detection range of an ultrasonic sensor depends on the wavelength and frequency it uses. The longer the wavelength and the smaller the frequency, the greater the detection distance. The following is the detection range of several popular products on our platform for your reference.

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