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    Picture of Water Quality Nitrite Sensor, 10~2200 ppm Picture of Water Quality Nitrite Sensor, 10~2200 ppm Picture of Water Quality Nitrite Sensor, 10~2200 ppm

    Water Quality Nitrite Sensor, 10~2200 ppm

    1 review(s) | Add your review
    SKU: SUCH-WQS-Nitrite
    $648.82
    ● 10~2200 ppm (mg/L) ● 0.01 ppm resolution ● RS485 (MODBUS-RTU) ● 1.1~7.7 pH usage range
    🚚 Free shipping
    🕒 Delivery date: 6-12 days
    🔁 30-day Returns
    Overview

    The water quality nitrite sensor supports the RS485 (Modbus-RTU) communication protocol with a measurement range of 10 to 2200 ppm (mg/L), enabling seamless integration with PLCs, data loggers, or host computer systems. The nitrite sensor exhibits excellent interference resistance, effectively mitigating common ionic interferences such as chloride and nitrate ions. It supports 3/4-inch threaded installation, featuring a compact design for easy installation and maintenance.

    Feature

    Nitrite sensor feature

    • Utilizing highly sensitive electrochemical detection principles, the sensor offers a measurement range from 10 to 2200 ppm. It's built-in temperature compensation ensures stable and reliable measurement accuracy across temperatures from -10°C to 110°C.
    • The water quality sensor has excellent anti-interference capabilities, effectively resisting common ionic interferences such as acetate, fluoride, chloride, nitrate, and sulfate, delivering more authentic and reliable data.
    • The SUCH nitrite sensor supports RS485 (Modbus-RTU) communication and features a low-power design, making it suitable for industrial and environmental water quality ion monitoring.

    Dimension (unit: mm)

    Nitrate sensor dimension

    Note: This ion sensor is not suitable for pipeline installation and must not be used in seawater.

    Wiring Diagram

    Item Color Function Description
    Data Transmission Yellow Wire RS485 Communication T/R+ (A)
    Data Transmission White Wire RS485 Communication T/R− (B)
    Power Supply Red Wire DC Power Supply Positive
    Power Supply Black Wire DC Power Supply Ground


    Usage Scenarios

    Nitrite sensor usage scenarios

    Specs
    Measurement Range 10 ~2200 ppm
    Resolution 0.01 ppm
    Measurement Accuracy ±5%FS
    Temperature Range -10.0 ~110.0 °C
    Resolution (Temperature) 0.1 °C
    Temperature Accuracy ±0.5 °C
    Slope 56 ± 3 mV
    Repeatability ±2%
    Interference Acetate, fluoride, chloride, nitrate, sulfate, etc.
    Pressure Range 0–2 atm
    Response Speed 90% response in 30 seconds
    Temperature Compensation Auto/Manual
    Communication Interface RS485 (MODBUS-RTU communication protocol)
    pH Adaptation Range 1.1–7.7pH
    Output Impedance 20–50 MΩ
    Power Supply 9 to 27 VDC
    Isolation Strength 2500 Vrms
    Product Power Approx. 0.5W
    Storage Long-term: Store in dry conditions
    Short-term: Store in chlorine dioxide solution
    Maintenance and Cleaning Immerse in diluted chlorine dioxide standard solution; optimal pH range: pH 4.5–pH 8
    Temperature Type Thermistor NTC10K
    Online Use Yes, adjust pH value
    Product Material PPS housing
    Connectors Terminal
    Applications Suitable for air quality and root/bulb cargo detection
    Installation Method 3/4-inch front/rear threads

    PDF computingWater Quality Nitrite Sensor User Manual

    Application

    Water quality sensor for water treatment plant

    Wastewater Treatment Plant

    Water quality sensor for aquaculture

    Aquaculture

    River discharge water pollution

    River Discharge Water Pollution

    FAQ
    ❯

    Water quality nitrite sensors typically employ ion-selective electrode technology. They convert concentration changes into electrical signals through the selective membrane's response to nitrite ions, enabling continuous online monitoring.

    ❯

    This water quality sensor is widely used in drinking water monitoring, wastewater treatment plants, aquaculture, environmental monitoring, and industrial circulating water systems to promptly detect nitrite exceedances in water bodies.

    ❯

    The nitrite sensor unit itself usually requires a power supply and an instrument or control system supporting RS485/Modbus protocols for data display, recording, and remote monitoring.

    1 review(s)
    5.0 1
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    Peter | 5/22/2026 12:47 AM
    Decent nitrite sensor for our shrimp ponds
    Needed a reliable nitrite sensor for a new recirculation filtration system and decided on this digital probe. The response time to water quality shifts is pretty fast, and the readings match up closely enough with our regular chemical kits. Didn't even have to mess around with crazy calibration steps out of the box. Signal stays steady and hasn't given me any headaches.
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