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Water Quality Ammonia Nitrogen&pH Sensor

SKU: SEN0711

This industrial-grade ammonia nitrogen sensor has an integrated probe and housing design. It accurately measures ammonia nitrogen (NH3/NH4+) in water, with a range of 0~100 mg/L, resolution 0.01 mg/L, and accuracy ±3% FS. Equipped with RS485 (ModBus-RTU), it includes Arduino/LoRaWAN tutorials. Features auto pH/temp compensation, pre-calibrated (supports two-point calibration). IP68 waterproof, ideal for aquaculture, wastewater treatment, and environmental monitoring.

Overview of RS485 Water Quality Ammonia Nitrogen & pH Sensor

Downloadable Resources

  • Docs
  • Tech Specs
  • Blog
    • 1. Getting Started

    This article offers a detailed guide on the first-time use, installation, calibration, and maintenance of ammonia nitrogen measurement equipment, emphasizing precautions to take and best practices for accurate readings and long-term equipment care.
    2. Example Code for Arduino - Ammonia Nitrogen, pH & Temperature Monitoring

    This project demonstrates how to connect the RS485 Water Quality Ammonia Nitrogen&pH Sensor to an Arduino development board to read real-time ammonia nitrogen concentration, pH value, and temperature data, and display them on the serial monitor. Users will learn how to use RS485 communication with ModBus-RTU protocol to interact with the sensor.
    Reference

    This comprehensive guide delves into RS485 communication protocols and Modbus-RTU data frame formats, detailing basic communication parameters, register address functionalities, and examples for sensor data management and calibration techniques.

    Specification

    Parameter Details
    Power Supply Voltage DC 10~30V
    Power Consumption 0.3W
    Communication Interface RS485 (Standard ModBus-RTU protocol) ,default 4800bit/s
    Baud rate 1200bit/s，2400bit/s, 4800bit/s, 9600bit/s, 19200bit/s, 38400bit/s, 57600bit/s, 115200bit/s configurable
    Measurement Range - Ammonia Nitrogen: 0~100 mg/L
    - pH: 0~14 pH
    - Temperature: 0°C~+60°C
    Measurement Accuracy - Ammonia Nitrogen: ±3%FS
    - pH: ±0.15 pH
    - Temperature: ±0.5°C
    Resolution - Ammonia Nitrogen: 0.01 mg/L
    - pH: 0.01 pH
    - Temperature: 0.1°C
    Repeatability Accuracy 1%
    Temperature Compensation Range 0°C~+60°C
    Response Time <30S
    Operating Temperature 0°C~+50°C
    Waterproof Rating IP68
    Pressure Resistance 0.2MPa
    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

    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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