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Water Quality Turbidity Sensor

SKU: SEN0710

This industrial water turbidity sensor uses the 90° light scattering principle. It has an integrated probe/housing (simple, compact). Key specs: 0-1000 NTU range, 0.1 NTU resolution, ±5% FS accuracy. Infrared LED + fiber optic path + filtering for anti-interference. RS485/ModBus-RTU, Arduino/LoRaWAN tutorials, built-in temp compensation. IP68 waterproof, pre-calibrated (supports 2-point calibration later). Ideal for drinking water, wastewater, river/lake monitoring.

Downloadable Resources

  • Docs
  • Tech Specs

    • 1. Getting Started

    The article offers a detailed guide on using turbidity sensors, covering first-time use precautions, submersible installation methods, and electrode calibration instructions to ensure accurate measurements and optimal sensor performance.

    2. Example Code for Arduino-Turbidity and Temperature Monitoring

    Tutorials are provided for connecting the sensor to an Arduino development board and DFRobot LoRaWAN, allowing for quick setup of a test environment and real-time data monitoring.

    Reference

    This article delves into the Modbus-RTU communication protocol, offering insights into basic parameters, data frame formats, and register addresses, along with practical examples for reading sensor data, setting deviation values, calibrating turbidity, and modifying communication settings.

    Specification

    Parameter Specification
    Power Supply Voltage 10~30V DC
    Power Consumption 0.2W
    Communication Interface RS485 (Standard ModBus-RTU protocol)
    Measurement Range - Turbidity: 0~1000 NTU
    - Temperature: 0°C~+60°C
    Measurement Accuracy - Turbidity: ±5%FS (25℃)
    - Temperature: ±0.5°C
    Resolution - Turbidity: 0.1 NTU
    - Temperature: 0.1°C
    Temperature Compensation Range 0°C~+60°C
    Response Time ≤30S
    Operating Temperature 0°C~+40°C
    Measurement Principle 90° Light Scattering Method
    Waterproof Rating IP68
    Pressure Resistance 0.6MPa
    Cable Length 5m
    Housing Material Corrosion-resistant plastic

    Pinout

    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

    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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