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RS485 Fluorescence Dissolved Oxygen Sensor (Seawater)

SKU: SEN0681

The Fluorescence Dissolved Oxygen Sensor is designed for accurate dissolved oxygen measurement using fluorescence technology. It operates on a DC10-30V power supply, consuming 0.2W, and communicates via RS485 with ModBus-RTU protocol. It measures within a range of 0-20mg/L or 0-200% saturation with an error margin of ±3% FS and resolution of 0.01mg/L. The sensor features a response time of ≤60s and operates optimally between 0-40°C. It is equipped with a waterproof rating of IP68 and pressure resistance of 0.6MPa. The fluorescent film has a lifespan of one year under normal use. The sensor's casing is made from corrosion-resistant plastic, ensuring durability in various environments. It includes a 5m cable length for flexible installation.

Overhead shot of RS485 Fluorescence Dissolved Oxygen Sensor (Seawater)

Downloadable Resources

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  • Tech Specs

    • Specification

    Parameter Specification
    Power Supply DC10-30V
    Power Consumption 0.2W
    Communication Interface RS485 (Standard ModBus-RTU Protocol)
    Measurement Principle Fluorescence
    Measuring Range 0-20mg/L, 0-200% Saturation
    Measurement Error ±3% FS; ±0.5°C (25°C)
    Resolution 0.01mg/L; 0.1%; 0.1°C
    Response Time ≤60s
    Operating Temperature 0-40°C
    Fluorescent Film Lifespan 1 year under normal use
    Waterproof Rating IP68
    Pressure Resistance 0.6MPa
    Cable Length 5m
    Casing Material Corrosion-Resistant Plastic

    Pinout

    Board Overview

    Num Label Description
    Brown line VCC Power input positive pole, DC10-30V power supply
    Black line GND Power ground wire
    Yellow line 485-A RS485 data line A
    Blue line 485-B RS485 data line B

    Dimensional Drawing

    FAQ

    • The device address is wrong, or there are devices with duplicate addresses (all factory defaults are 1).
      1. The device address is wrong, or there are devices with duplicate addresses (all factory defaults are 1).
      2. Host polling interval and waiting response time are too short, both need to be set above 200ms.
      3. The computer has multiple COM ports, and the selected port is incorrect.Baud rate, check mode, data bit, stop bit error.
      4. 485 bus is disconnected, or A and B lines are connected in reverse.
      5. Too many devices or too long wiring, power supply should be provided nearby, 485 enhancer should be added, and 120Ω terminal resistance should be added.
      6. USB to 485 driver is not installed or damaged.
      7. Equipment is damaged.

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