Online Analyser for Total Nitrogen

NA400-C1

The T-N-20 Online Total Nitrogen Analyzer is an advanced automatic water quality instrument designed for continuous monitoring of total nitrogen (TN) in wastewater and environmental water systems. Using the spectrophotometric potassium persulfate digestion method, the analyzer performs automatic chemical reactions and optical detection to deliver reliable and accurate results. It is widely used for pollution monitoring, wastewater treatment, and environmental compliance applications.

Accurate monitoring of nitrogen pollution in water
Helps evaluate water quality and treatment efficiency
Automatic operation reduces manual intervention
Supports environmental compliance and reporting
Suitable for continuous industrial and municipal use

Application-Based Customization

Engineered for Your Process Conditions

Expert Selection Support

Reliable After-Sales Service

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Measurement range: 0–50 mg/L
Low detection limit: 0.02 mg/L
High resolution: 0.01 mg/L
Automatic chemical digestion + spectrophotometric detection
Adjustable measurement cycle (minimum 20 minutes)
Automatic calibration (1–99 days adjustable)
Self-diagnostic function with auto recovery after power failure
Data storage up to 6 months
Touchscreen interface with user-friendly operation
RS232 digital output + 4–20 mA analog output
Low maintenance (monthly interval)

Industrial wastewater discharge monitoring
Municipal sewage treatment plants
Environmental surface water monitoring
Pollution source monitoring
Chemical and fertilizer industries
Agricultural runoff monitoring

Range: Suitable for wastewater with total nitrogen in the range of 0–50 mg/L
Test Method: Spectrophotometric determination with potassium persulfate digestion
Measuring Range: 0–50 mg/L
Detection Lower Limit: 0.02 mg/L
Resolution: 0.01 mg/L
Accuracy: ±10% or ±0.2 mg/L (whichever is greater)
Repeatability: ≤±5% or ≤±0.2 mg/L
Zero Drift: ±3 mg/L
Span Drift: ±10%
Measurement Cycle: Minimum test cycle 20 minutes, chromogenic time adjustable from 5–120 minutes depending on site conditions
Sampling Period: Adjustable time interval, integral hour or trigger measurement mode
Calibration Cycle: Automatic calibration adjustable from 1–99 days, manual calibration available according to actual water samples
Power Supply: AC 230 V ±10%, 50–60 Hz, 5 A
Self-Checking Protection: Self-diagnostic working status, no data loss during abnormal condition or power failure, automatic removal of residual reagents and automatic recovery after reset or power restoration
Maintenance Cycle: Maintenance interval more than one month, about 30 minutes each time
Data Storage: At least six months data storage
Input Interface: Switch quantity input
Output Interface: Two RS232 digital outputs and one 4–20 mA analog output
Working Conditions: Indoor operation, temperature 5–28°C, relative humidity ≤90% RH (no condensation or dew)
Dimensions: 355 × 400 × 600 mm
Human-Machine Interface: Touch screen display with instruction input