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Portable Digital RS485 NH4+ Analyzer for Water Quality Monitoring - China Suppliers & Factory

The Ammonia Nitrogen (NH4+) Analyzer offers laboratory-grade precision for on-site water quality monitoring in various environments. Manufactured from eco-friendly, corrosion-resistant polymer plastic, this sensor is designed for durability in challenging settings such as industrial wastewater, outdoor reservoirs, and municipal treatment facilities. With a unique isolated 9-24VDC power supply system, it minimizes electromagnetic interference, ensuring an impressive ±5% full-scale accuracy even in high-noise industrial environments. This analyzer allows for custom calibration through adjustable forward/reverse curves, providing tailored measurement profiles suitable for specific applications. Its compact design, measuring 31mm×200mm, and RS-485 MODBUS output facilitate seamless integration into existing monitoring networks. Ideal for a range of applications including surface water, sewage, drinking water, and industrial effluent analysis, this pollution-resistant sensor significantly reduces maintenance efforts and operational costs. As a leading choice among China suppliers and factory manufacturers, the Ammonia Nitrogen Analyzer ensures reliable performance for all water quality monitoring needs.

    Product Parameters
    Product Name Ammonia Nitrogen Analyzer
    Measurement Method Ionic Electrode
    Range 0 ~ 1000 mg/L
    Accuracy ±5% F.S.
    Power 9–24 VDC (Recommended: 12 VDC)
    Material Polymer Plastic
    Size 31 mm × 200 mm
    Working Temperature 0 – 50 ℃
    Cable Length 5 m (extendable per user requirement)
    Sensor Interface RS-485, MODBUS Protocol
    Product Features
    Industrial-Grade Durability

    Constructed from high-strength polymer plastic, the analyzer resists chemical corrosion (e.g., acids, alkalis) and mechanical wear, ensuring reliable operation in wastewater treatment plants or marine environments.

    Adaptive Calibration System

    Supports standard solution calibration with configurable forward/reverse curve algorithms, enabling precision tuning for specialized applications like aquaculture or pharmaceutical wastewater.

    Electromagnetic Immunity

    Isolated power supply design with built-in surge protection minimizes signal distortion, ensuring stable data transmission in complex industrial electromagnetic fields.

    Multi-Environment Adaptability

    Designed for direct installation in surface water monitoring stations, sewage treatment lines, potable water distribution networks, and chemical plant effluent systems.

    Low-TCO Design

    Compact structure and anti-fouling surface reduce cleaning frequency, while plug-and-play integration lowers deployment costs for large-scale monitoring networks.

    Applications
    1 Municipal Wastewater Treatment

    Real-time NH4⁺ monitoring to optimize biological treatment processes and ensure compliance with discharge standards (e.g., EPA, EU regulations).

    2 Environmental Resource Protection

    Continuous tracking of ammonia nitrogen in rivers/lakes to identify pollution sources and support ecosystem restoration projects.

    3 Industrial Process Control

    In-line monitoring of NH4⁺ in chemical manufacturing, food processing, and metal plating effluents to ensure regulatory compliance.

    4 Drinking Water Safety Management

    Early detection of ammonia nitrogen in source water to prevent nitrogenous contaminant buildup in potable water systems.

    5 Aquaculture Production

    Maintain optimal NH4⁺ concentrations in fish farms to promote aquatic health and maximize yields.

    6 Agricultural Water Management

    Assessment of nutrient runoff from farmlands to support sustainable irrigation practices and water body protection.

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    No. Picture Product Name Model Range Accuracy Resolution
    Digital RS485 Water Quality Sensors Technical Data
    1 DO sensor LMS-DO10B DO Sensor LMS-DO10B 0–20 mg/L, 0–60 ℃ ±0.1–0.3 mg/L 0.01 mg/L
    2 DO sensor LMS-DO10C DO Sensor LMS-DO10C 0–20 mg/L, 0–60 ℃ ±0.3 mg/L 0.01 mg/L
    3 Trace DO sensor LMS-TDO100 Trace DO Sensor LMS-TDO100 0–2000 ppb, 0–50 ℃ ±1 ppb 1 ppb
    4 PH sensor LMS-PH100 PH Sensor LMS-PH100 0–14 pH ±0.02 pH 0.01 pH
    5 ORP sensor LMS-ORP100 ORP Sensor LMS-ORP100 ±1000.0 mV ±0.2 mV 0.1 mV
    6 EC/TDS sensor LMS-TDS102 EC/TDS Sensor LMS-TDS102 CT: 0–9999 uS/cm; 0–100 mS/cm; TDS: 0–10000 ppm ±2.5% FS 1 uS/cm, 0.01 mS/cm, 1 ppm
    7 Salinity/EC/TDS sensor LMS-SAL104 Salinity/EC/TDS Sensor LMS-SAL104 Conductivity: 0.1–500 mS/cm; TDS: 0–60000 ppm; Salinity: 0–500.00 ppt ±1.5% FS 1 uS/cm, 0.01 mS/cm, 1 ppm, 0.01 ppt
    8 COD sensor LMS-COD100 COD Sensor LMS-COD100 COD: 0.1–1500 mg/L; TOC: 0.1–750 mg/L; BOD: 0.1–900 mg/L; Turbidity: 0.1–4000 NTU; Temp: 0–50 ℃ ±5% equiv. KHP; Temp: ±0.5 ℃ 0.01 mg/L equiv. KHP
    9 TSS sensor LMS-TSS100 TSS Sensor LMS-TSS100 0–50000 mg/L / 0–120000 mg/L ±10% FS or 10 mg/L 0.1 mg/L or 1 mg/L
    10 Turbidity sensor LMS-TUR10L Turbidity Sensor LMS-TUR10L 0–100 NTU ±10% FS or 0.3 NTU 0.01 NTU
    11 Turbidity sensor LMS-TUR10H Turbidity Sensor LMS-TUR10H 0–3000 NTU ±10% FS or 0.3 NTU 0.01 NTU
    12 CO2 sensor LMS-CO2100 CO₂ Sensor LMS-CO2100 2000 PPM / 10000 PPM / 50000 PPM ±5% FS 1 ppm
    13 Ammonia Nitrogen sensor LMS-NH4100 Ammonia Nitrogen Sensor LMS-NH4100 0–1000 mg/L ±5% FS
    14 Ion Selective sensor LMS-ION100 Ion Selective Sensor LMS-ION100 0–1000 mg/L ±5% FS
    15 Oil in Water sensor LMS-OIL100 Oil in Water Sensor LMS-OIL100 0–50 mg/L; 0–5 mg/L ±3% FS 0.01 ppm
    16 Chlorophyll sensor LMS-CHL100 Chlorophyll Sensor LMS-CHL100 0–500 ug/L ±3% FS 0.1 ug/L
    17 Blue-Green Algae sensor LMS-BGA100 Blue-Green Algae Sensor LMS-BGA100 0–2,000,000 cells/ml ±3% FS
    18 Residual Chlorine sensor LMS-HCLO100 Residual Chlorine Sensor LMS-HCLO100 0–20.00 ppm ±5% FS 0.001 / 0.01 ppm
    19 Marine Current sensor LMS-Current100 Marine Current Sensor LMS-Current100 Temp: -3–45 ℃; Velocity: 0–500 cm/s; Direction: 0–359.9° ±0.05 ℃; ±1 cm/s or ±2%; ±2° Temp: 0.001 ℃; Velocity: 0.1 cm/s; Direction: 0.1°
    Water Quality Analyzer Equipment
    No. Picture Product Name Model Size Power Display Output
    20 Portable DO Analyzer LMS-PA100 Portable DO Analyzer LMS-PA100 100 mm × 204 mm <0.5 W; 7.5 V, 5 batteries LCD Display Screen
    21 Multi-parameter Portable Water Analyzer LMS-PA100P Multi-parameter Portable Water Analyzer LMS-PA100P 220 mm × 120 mm × 100 mm Rechargeable lithium battery with 220 V DC charging adapter LCD Display Screen
    22 Multi-parameter Touch-screen Online Analyzer LMS-OA200T Multi-parameter Touch-screen Online Analyzer LMS-OA200T 180 mm × 230 mm × 100 mm AC 220 VAC 7-inch Touch Screen
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    Frequently Asked Questions
    Q What measurement method does the Ammonia Nitrogen Analyzer use?
    The analyzer uses the ionic electrode method to measure ammonia nitrogen (NH4⁺) concentrations in water. This method provides fast, accurate, and continuous real-time readings without the need for reagents, making it ideal for industrial and environmental monitoring applications.
    Q What is the measurement range and accuracy of the LMS-NH4100 sensor?
    The LMS-NH4100 Ammonia Nitrogen Sensor covers a measurement range of 0–1000 mg/L with an accuracy of ±5% F.S. (Full Scale). This wide range makes it suitable for both low-concentration drinking water monitoring and high-concentration industrial wastewater applications.
    Q What communication protocol does the sensor support, and how can it be integrated into existing systems?
    The sensor supports RS-485 with MODBUS protocol, which is one of the most widely used industrial communication standards. It can be seamlessly integrated into SCADA systems, PLCs, data loggers, and multi-parameter online analyzers such as the LMS-OA200T touch-screen controller.
    Q Is the analyzer suitable for outdoor or harsh industrial environments?
    Yes. The analyzer is constructed from high-strength polymer plastic that resists chemical corrosion from acids and alkalis. It features an isolated power supply with built-in surge protection for electromagnetic immunity, and operates reliably within a temperature range of 0–50 ℃, making it well-suited for wastewater treatment plants, marine environments, and outdoor monitoring stations.
    Q How long is the standard cable, and can it be extended?
    The standard cable length is 5 meters. It can be extended according to user requirements, providing flexibility for installation in larger facilities such as municipal wastewater treatment plants, industrial processing lines, or remote environmental monitoring stations.
    Q What other water quality parameters can be monitored alongside ammonia nitrogen?
    In addition to ammonia nitrogen, the product line includes sensors for dissolved oxygen (DO), pH, ORP, EC/TDS, salinity, COD, TSS, turbidity, CO₂, residual chlorine, chlorophyll, blue-green algae, oil in water, and marine current. All sensors support RS-485 MODBUS protocol and can be combined with portable or online multi-parameter analyzers for comprehensive water quality monitoring solutions.

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