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Water Quality Electrical Conductivity Sensor(K=1)

SKU: SEN0706

This industrial-grade water electrical conductivity sensor integrates probe and housing. Features K=1, 1~2000 μS/cm range, 0.1 μS/cm resolution, ±1%FS accuracy, salinity/TDS conversion. RS485 ModBus-RTU interface, Arduino/LoRaWAN tutorials, built-in temp sensor for auto compensation. Factory-calibrated, IP68 waterproof, suitable for aquaculture, tap water monitoring, etc.

Downloadable Resources

  • Docs
  • Tech Specs

    • 1. Getting Started

    This article provides a comprehensive guide on electrode calibration using single-point calibration techniques, outlines submersible and pipe installation methods, and offers essential maintenance tips for optimal sensor performance.

    2. Example Code for Arduino - EC, Temperature, Salinity & TDS Monitoring

    This project demonstrates how to connect the RS485 Water Quality Electrical Conductivity Sensor to an Arduino development board, read real-time EC (electrical conductivity), temperature, salinity, and TDS (total dissolved solids) data via the ModBus-RTU protocol, and display the data on the Arduino IDE serial monitor. Users will learn how to implement RS485 communication with ModBus-RTU, parse sensor data, and leverage built-in temperature compensation for accurate measurements.

    Reference

    The article serves as a comprehensive guide to the Modbus-RTU communication protocol, detailing essential parameters, data frame formats, and CRC error checking, along with practical examples for sensor calibration and address modification.

    Specification

    Parameter Details
    Power Supply Voltage 10~30V DC
    Power Consumption 0.4W
    Communication Interface RS485 (Standard ModBus-RTU Protocol)
    Measurement Range - Conductivity: K=1:1~2000μS/cm
    - Temperature: -20°C~+60°C
    - Salinity: K=1:0~1000ppm
    - TDS: K=1:0~1100ppm
    Measurement Error - Conductivity: ±1%FS
    - Temperature: ±0.5°C
    Resolution - Conductivity: 0.1μS/cm
    - Temperature: 0.1°C
    Temperature Compensation Range -20°C~+60°C
    Temperature Compensation Coefficient Default 0.02
    Operating Temperature -20°C~+80°C
    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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