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    Underwater Ultrasonic Sensor, 5-800cm/8-800cm, UART/RS485 Output

    SKU: SUCH-US-UOD
    $69.12
    ● Output UART Ctrl / RS485 (selectable) ● Range 5 to 800 cm (UART), 8 to 800 cm (RS485) ● Accuracy ±(1+S×1%) cm ● Angle 15±5° (UART), 25±5° (RS485)
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    🕒 Delivery date: 6-12 days
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    Overview

    This underwater ultrasonic sensor provides UART and RS485 outputs for flexible submersible level integration. Range reaches 5 to 800cm for UART or 8 to 800cm for RS485, with narrow beam angles of 15° or 25° respectively and ±(1+S×1%)cm accuracy. Blind zones are as low as 5cm, while standby current drops below 0.005mA for UART, all running on 5V DC. Housed in rugged gray ASA material weighing 100g, this underwater ultrasonic sensor is ideal for tank monitoring, marine navigation, and harsh outdoor automation.

    Feature

    • Dual-Protocol Output: UART and RS485 interfaces with 5V DC enable easy controller integration.
    • Ultra-Low Standby: UART mode consumes < 0.005 mA, ideal for battery-powered remote sensing.
    • Long-Range Detection: 5 to 800cm span with ≤ 5cm blind zone covers extensive monitoring needs.
    • Narrow Focused Beam: 15° or 25° tight angles ensure precise targeting with minimal echo interference.
    • Robust Outdoor Casing: UV-resistant ASA gray housing ensures reliable operation in harsh weather.

    Dimension

    Wiring

    Pin No. Wire Color Signal Description
    1 Red V+ Power Supply (+)
    2 Black GND Power Supply (-)
    3 Yellow RX/B RS485 B / UART RX
    4 White TX/A RS485 A / UART TX
    Spec
    Range 5 to 800 cm / 8 to 800 cm (optional)
    Output Type UART Controlled / RS485 (optional)
    Sensing Geometry Range 5 to 800 cm: Min. dist. ≤5 cm; Angle 15±5°
    Range 8 to 800 cm: Min. dist. ≤8 cm; Angle 25±5°
    Standby Current UART Controlled: <0.005mA
    RS485: <14mA
    Average Operating Current UART Controlled: <13mA
    RS485: <15mA
    Output Response Time UART Controlled: 18ms
    RS485: 20ms
    Angle 15±5°
    Operating Voltage 5V DC
    Power-On Response Time <600ms
    Operating Cycle Controlled
    Distance Measurement Accuracy ±(1+S*1%)cm
    Housing Color Gray
    Housing Material ASA
    Weight 100g
    Application
    Ultrasonic level sensor installed above a water treatment clarifier tank for accurate liquid height monitoring and process control

    Water Treatment Tank

    Ultrasonic continuous level transmitter in a wastewater equalization basin to regulate influent flow and prevent pump dry-running

    Wastewater Equalization

    Ultrasonic water level meter monitoring river upstream and downstream levels for automated sluice gate operation and flood control

    River Dam Gate

    FAQ
    ❯

    A: For UART, range is 5–800 cm with min. distance ≤5 cm. For RS485, range is 8–800 cm with min. ≤8 cm. It handles both very close and long‑range targets up to 8 meters.

    ❯

    A: Accuracy is ±(1 + S×1%) cm, where S is the measured distance in cm. At 100 cm it's ±2 cm; at 800 cm it's ±9 cm – reliable for most ranging tasks.

    ❯

    A: YUART is best for direct MCU connection (e.g., Arduino) with simple wiring. RS485 supports long‑distance transmission (hundreds of meters) and industrial bus networks – pick based on your communication needs.

    ❯

    A: It runs on 5 V DC. In UART mode, standby is <0.005 mA (5 μA) and average <13 mA – perfect for battery devices. RS485 draws <14 mA standby and <15 mA average, still moderate for industrial use.

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