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Water Quality Blue Green Algae Sensor

SKU: SEN0714

This industrial-grade Blue Green Algae sensor uses fluorescence principle to accurately measure algae concentration (0-300,000 cells/ml, ±5% FS, 1 cell/ml resolution). It has integrated probe/housing, fiber optic design with filtering for anti-interference, RS485 (ModBus-RTU), built-in temp sensor (auto compensation), factory-calibrated, IP68 waterproof. Suitable for rivers/lakes/ponds, with Arduino connection tutorials.

Downloadable Resources

  • Docs
  • Tech Specs

    • 1. Getting Started

    This article offers detailed guidance on installing submersible sensors, emphasizing installation methods, precautions, and maintenance for accurate water quality measurement.

    2. Example Code for Arduino-Blue Green Algae and Temperature Monitoring

    This project demonstrates how to connect the RS485 Blue Green Algae Sensor to an Arduino development board, read real-time blue green algae concentration and temperature data using the ModBus-RTU protocol, and set up a real-time monitoring environment. Users will learn RS485 communication basics, ModBus-RTU protocol application, and how to process sensor data for accurate readings.

    Reference

    This article provides an in-depth guide on the Modbus-RTU communication protocol, covering essential parameters, data frame formats, and detailed register address descriptions for sensor communication.

    Specification

    Parameter Value
    Power Supply Voltage 10~30V DC
    Power Consumption 0.4W
    Communication Interface RS485 (Standard ModBus-RTU protocol)
    Measurement Range - Blue Green Algae 0~300,000 cells/ml
    Measurement Range - Temperature 0°C~+60°C
    Measurement Accuracy - Blue Green Algae ±5%FS (25℃)
    Measurement Accuracy - Temperature ±0.5°C
    Resolution - Blue Green Algae 1 cell/ml
    Resolution - Temperature 0.1°C
    Linearity R²>0.999
    Temperature Compensation Range 0°C~+60°C
    Response Time ≤30S
    Operating Temperature 0°C~+40°C
    Measurement Principle Fluorescence method
    Waterproof Rating IP68
    Pressure Resistance 0.6MPa
    Cable Length 5m
    Housing 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

    • How to troubleshoot when there is a problem?
      1. The computer has multiple COM ports, and the selected port is incorrect.
      2. The device address is wrong, or there are devices with duplicate addresses (all factory defaults are 1).
      3. Baud rate, check mode, data bit, stop bit error.
      4. Host polling interval and waiting response time are too short, both need to be set above 200ms.
      5. 485 bus is disconnected, or A and B lines are connected in reverse.
      6. 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.
      7. USB to 485 driver is not installed or damaged.
      8. Equipment is damaged.

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