AND-2000 Online Ammonia Nitrogen Analyzer
Typical Applications
The AND-2000 Online Ammonia Nitrogen Analyzer complies with HJ 101-2019 “Technical Requirements and Test Methods for Ammonia Nitrogen Water Quality Online Automatic Monitoring Instruments”, enabling long-term, unattended automatic monitoring of ammonia nitrogen content in various water bodies. It is widely used in surface water monitoring, environmental protection monitoring, industrial process water monitoring, municipal wastewater monitoring, wastewater treatment plant monitoring, and other related fields.
Product Features
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◎ Advanced Sequential Injection Platform: Significantly reduces component count, featuring a simple and easy-to-troubleshoot structure.
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◎ High-Precision Stepping Syringe Pump: Non-contact liquid dispensing design. Requires less dilution water for high-range measurements and features short dilution times.
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◎ Integrated Quartz Cuvette Colorimetric Unit: Resistant to contamination with high absorbance resolution.
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◎ Imported Light Source: No/negligible warm-up time, with a service life of up to 100,000 hours.
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◎ Innovative Flow Path Design and Measurement Environment: Effectively eliminates turbidity interference, ensuring reliable and accurate monitoring results.
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◎ In-house Developed Ambient Temperature Compensation Mechanism: Maintains stability within ≤3% (national standard requirement is 5%).
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◎ Optimized Masking Agent Formula: Offers strong resistance to interference from impurity ions.
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◎ Liquid Reagents: Do not require low-temperature storage and can be preserved at room temperature for over 30 days.
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◎ Full-Range Lower Limit: Suitable for low-concentration ammonia nitrogen measurement.
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◎ Power Failure Protection Design: Prevents data loss and automatically resumes operation upon power restoration.
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◎ Intelligent Fault Alarm & Auto-Reset Function: Prevents abnormal instrument idling.
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◎ Conventional Flow Path Components: Utilize laser etching technology for precise customization of groove dimensions and positioning. Valve cores are made of sapphire material, offering superior corrosion and wear resistance, long service life, and excellent stability.
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◎ Automatic Verification & Judgment Function: Meets the requirements of HJ 355-2019 “Technical Specification for Operation of Water Pollution Source Online Monitoring Systems (CODcr, NH₃-N, etc.)”.
Working Principle
The instrument’s measurement principle conforms to the standard HJ 536-2009 “Water Quality – Determination of Ammonia Nitrogen – Salicylate Spectrophotometric Method”. After the water sample is mixed with a masking agent, ammonia nitrogen present as free ammonia or ammonium ions reacts with salicylate and hypochlorite ions in an alkaline medium and in the presence of a catalyst, forming a colored complex. The analyzer detects this color change, converts it into an ammonia nitrogen concentration value for output. The amount of colored complex formed is directly proportional to the amount of ammonia nitrogen.
Technical Specifications
| Specification | Technical Parameter |
|---|---|
| Range | 0~2/10/50/100/500/1000 mg/L, Auto/manual range switching. Other ranges can be customized. |
| **Indication Error *** | ±3% |
| Repeatability | ≤2% |
| Quantitation Limit | ≤0.03 mg/L |
| Resolution | 0.001 mg/L |
| 24h Low Concentration Drift | ≤0.02 mg/L |
| 24h High Concentration Drift | ≤1% |
Why Choose Dongrun Online Analyzers?
1μL High-precision Injection System Exclusive Patented Design.
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Accuracy
Replaces traditional peristaltic pumps with a more accurate injection pump, achieving precision to 1μL.
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Durable
The main components such as pumps and valves require no maintenance within one year.
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Cost-saving
Eliminates the need for pump tubing, saving on consumable replacements.
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Safety
Automatic activation of protective functions if the water tank is found to be empty, preventing pump damage.
Core Component Colorimetric Module Independently Developed and Manufactured
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The colorimetric module features reference light measurement functionality
It can mitigate interference from fluctuations in light sources or temperature changes on measurement results.
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50% increase in light source lifespan
Automatically controls light-on time to extends the lifespan of the light source, reducing aging.
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The program automatically adjusts the intensity of the light source
No manual intervention or maintenance required.
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The colorimetric module’s heating function is safe and reliable
Real-time monitoring of temperature rise rate, over-temperature alarm, and a fully enclosed design.
Advanced Quality Control Calibration System
| option | Regular brands | Dongrun | Value |
|---|---|---|---|
| Failure verification calibration | Manual adjustment in case of verification failure | Instrument automatically initiates recalibration in case of verification failure | More convenient |
| Selectable range | Only fixed range | High, medium, and low multiple ranges are available | Applicable range is more extensive |
| Verification method | Only range verification | Automatic zero-check and range verification, two methods | More accurate |
Low-Medium-High 3-in-1 Range System
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Three ranges
Instrument offers high, medium, and low three ranges.
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Customizable range values
Users can define range values for both the medium and high ranges. instrument will automatically adjust to match.
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Effortless operation
After switching between manual and automatic modes, there’s no need to recalibrate the instrument.
After changing the range, only single-point calibration is required, with no need for calibration of the working curve.
One-click waste discharge and one-click reagent filling.
Key operations are visualized, allowing real-time signal monitoring.
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Two modes of manual and automatic
In manual mode, users can select a specific range for measurement.
In automatic mode, the instrument will automatically switch ranges based on the measurement results.
