CommunityForumWikiBlogLearn

Water Quality ORP Sensor

SKU: SEN0709

This is an industrial-grade water quality ORP sensor. It integrates probe and housing, measuring ORP from -1999 to 1999mV (1mV resolution, ±5mV accuracy). Equipped with RS485 (ModBus-RTU), it supports Arduino/LoRaWAN connections. Built-in temp sensor offers auto compensation. Factory-calibrated, ready to use; supports two-point calibration later. IP68 waterproof, suitable for pools, aquaculture, wastewater treatment.

Downloadable Resources

  • Docs
  • Tech Specs

    • 1. Getting Started

    Learn how to properly use, install, calibrate, and maintain ORP sensors to ensure accurate measurements and extend their lifespan, including first-time precautions, installation methods, electrode calibration instructions, and long-term maintenance guidelines for optimal performance.

    2. Example Code for Arduino-ORP and Temperature Monitoring

    This project demonstrates how to connect the RS485 Water Quality ORP Sensor to an Arduino board to read real-time ORP values and temperature data. Users will learn how to communicate with RS485 devices using the ModBus-RTU protocol and set up a basic environmental monitoring system.

    Reference

    This article offers an in-depth look at the Modbus-RTU communication protocol, detailing data frame formats, register addresses, function codes, and practical examples to effectively manage and configure communication networks, including setting ORP values, temperature adjustments, and device configurations.

    Specification

    Parameter Specification
    Power Supply Voltage 10~30V DC
    Power Consumption 0.3W
    Communication Interface RS485 (Standard ModBus-RTU protocol)
    Measurement Range - ORP: -1999~1999mV
    - Temperature: 0°C~+60°C
    Measurement Accuracy - ORP: ≤±5mV (at 25℃, in 222mV standard solution)
    - Temperature: ±0.5°C
    Resolution - ORP: 1mV
    - Temperature: 0.1°C
    Temperature Compensation Range 0°C~+60°C
    Response Time <1S
    Operating Temperature 0°C~+80°C
    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.

    Explore More Related Questions >

    Was this article helpful?

    TOP