This method is applicable to wastewater containing ammonia nitrogen within the range of 0–300 mg/L. Excessive calcium and magnesium ions, residual chlorine, turbidity, or other interfering factors may affect measurement accuracy.

Technical Parameters

Measurement Method	Salicylic Acid Spectrophotometric Method
Measurement Range	0–300 mg/L
Indication Error	≤ ±3% when ≥ 5.00 mg/L; ≤ ±5% when < 5.00 mg/L
Repeatability	≤ ±2%
Measurement Cycle	Minimum cycle is 20 minutes; color development time can be adjusted flexibly between 5–30 min based on environmental conditions.
Sampling Cycle	Adjustable time interval (10–9999 min) or on-the-hour measurement mode.
Calibration Cycle	Adjustable at any interval from 1–99 days.
Maintenance Cycle	≥ 168 hours, with each maintenance lasting approximately 1 hour.
Reagent Consumption	< 0.50 CNY per sample.
Outputs	RS-232, 4–20 mA, RS-485
Environmental Requirements	Temperature-controlled indoor environment (recommended: 5–40 °C); humidity 45%–85%.
Power Supply	AC 220 ± 10% V, 50 ± 1% Hz, 5 A
Dimensions	Height 1500 × Width 500 × Depth 450 mm

Additional Features

Data retention during abnormal alarms or power outages.
Touchscreen display and command input.
Automatic discharge of residual reactants and resumption of operation after power restoration or system reset.

Key Features

Unique Design: This product features a distinctive design that ensures lower failure rates, reduced maintenance requirements, minimal reagent consumption, and higher cost-effectiveness compared to similar products.

1. Selector Valve Assembly

Enables flexible reagent sampling timing and diverse channel configurations. Minimizes dead volume for easy maintenance and extended service life.

2. Micro-Dosing Unit

Utilizes a visual photoelectric system for precise reagent measurement, eliminating quantitative errors caused by peristaltic pump tube wear. Achieves accurate micro-dosing with 0.7 mL per dose, significantly reducing reagent usage.

3. Sample Introduction Unit

Employs a peristaltic pump with negative pressure suction, creating an air buffer zone between reagents and the pump tube to prevent corrosion. Simplifies and enhances flexibility in reagent mixing.

4. Sealed Digestion Unit

Operates under high-temperature and high-pressure conditions to accelerate reactions. Eliminates corrosion risks from volatile gases in open systems.

5. Reagent Tubing

Uses imported modified PTFE (polytetrafluoroethylene) transparent tubing with an inner diameter > 1.5 mm to minimize clogging by particulate matter in water samples.

Analytical Principle

After the water sample is mixed with a masking agent, ammonia nitrogen (present as free ammonia or ammonium ions) reacts with a salicylic acid chromogenic reagent under alkaline conditions and in the presence of a sensitizing agent, forming a colored complex. The analyzer detects this color change, converts it into an ammonia nitrogen concentration value, and outputs the result. The amount of colored complex formed corresponds to the concentration of ammonia nitrogen.

Tags:

Nessler's Spectrophotometric Method Ammonia Nitrogen Analyzer 0-300mg/L Range NH3-N Online Monitor with 20min Measurement Period

Get Best Price

Online Water Quality Monitor

Multi Parameter Water Quality Monitor

PH ORP Meter

Conductivity Meter

Dissolved Oxygen Meter

Ion-selective Meter

Residual Chlorine Meter

Turbidity Analyzer

TSS Analyzer

COD Analyzer

Optical Water Quality Sensor

Ultrasonic Meter

Water Quality Monitoring Accessories

Online Water Quality Monitor

Drinking Water Monitoring

Industrial Wastewater Monitoring

Aquaculture water Quality Monitoring

Boiler Water Monitoring

Multi Parameter Water Quality Monitor

PH ORP Meter

PH ORP Transmitter And Sensor

Portable PH ORP Meter

Desktop PH ORP Meter

Conductivity Meter

Conductivity Transmitter And Sensor

Portable Conductivity Meter

Desktop Conductivity Meter

Dissolved Oxygen Meter

Dissolved Oxygen Transmitter And Sensor

Portable Dissolved Oxygen Meter

Desktop Dissolved Oxygen Meter

Ion-selective Meter

Fluoride Analyzer

Chloride Analyzer

Calcium Analyzer

Ammonia Nitrogen Analyzer

Nitrate Nitrogen Analyzer

Residual Chlorine Meter

Disinfectant Water Monitoring

Turbidity Analyzer

TSS Analyzer

COD Analyzer

Optical Water Quality Sensor

Ultrasonic Meter

Liquid Level Meter

Sludge Interface Meter

Water Quality Monitoring Accessories

products details

Salicylic Acid Spectrophotometric Method Ammonia Nitrogen Analyzer 0-300mg/L Range NH3-N Online Water Quality Monitor with RS-232 4-20mA RS-485 Output

Online Water Quality Monitor

Multi Parameter Water Quality Monitor

PH ORP Meter

Conductivity Meter

Dissolved Oxygen Meter

Ion-selective Meter

Residual Chlorine Meter

Turbidity Analyzer

TSS Analyzer

COD Analyzer

Optical Water Quality Sensor

Ultrasonic Meter

Water Quality Monitoring Accessories

Online Water Quality Monitor

Drinking Water Monitoring

Industrial Wastewater Monitoring

Aquaculture water Quality Monitoring

Boiler Water Monitoring

Multi Parameter Water Quality Monitor

PH ORP Meter

PH ORP Transmitter And Sensor

Portable PH ORP Meter

Desktop PH ORP Meter

Conductivity Meter

Conductivity Transmitter And Sensor

Portable Conductivity Meter

Desktop Conductivity Meter

Dissolved Oxygen Meter

Dissolved Oxygen Transmitter And Sensor

Portable Dissolved Oxygen Meter

Desktop Dissolved Oxygen Meter