污染源总氮在线监测仪 Pollution Source Total Nitrogen Online Monitor

    水中的总氮主要来源于生活污水中含氮有机物受微生物作用的分解产物，焦化合成氨等工业废水，以及农田排水等。水体中总氮含量较高时，对鱼类呈现毒害作用，对人类也有不同程度的危害。测定水中总氮含量有助于评价水体被污染和“自净”状况，因此总氮是表征水质污染的重要指标。
    该分析仪能够根据现场设定长期无人值守自动连续工作，广泛适用于工业污染源排放废水、市政污水处理厂污水、环境质量地表水等场合。根据现场测试工况的复杂程度，可选配相应的预处理系统，以保证测试过程可靠、测试结果准确，充分满足不同场合现场需求。

    The total nitrogen in the water is mainly derived from the decomposition products of nitrogen-containing organic matter in domestic sewage by microorganisms, industrial wastewater such as coking ammonia, and drainage of farmland. When the total nitrogen content in the water is high, it is toxic to fish and has different degrees of harm to humans. Determination of total nitrogen in water helps to assess the pollution and “self-cleaning” of water bodies, so total nitrogen is an important indicator of water pollution.
    The analyzer can automatically and continuously work according to the on-site setting for long-term unattended operation, and is widely used in industrial waste water discharge, municipal sewage treatment plant sewage, environmental quality surface water and other occasions. According to the complexity of the field test conditions, the corresponding pre-treatment system can be selected to ensure the test process is reliable and the test results are accurate, which fully meets the on-site requirements of different occasions.

产品原理：

水样和掩蔽剂混合后，以游离态的氨或铵离子等形式存在的总氮在碱性环境和增敏剂存在的情况下，与过硫酸钾显色试剂反应生成一种带色络合物，分析仪检测此颜色的变化，并把这种变化换算成总氮值输出来。生成的带色络合物量相当于总氮量。

本方法适用于总氮在0~50mg/L范围内的废水，过高的钙镁离子、余氯或浊度等可能会对测量产生干扰。

Product Principle:

After mixing the water sample and the masking agent, the total nitrogen present in the form of free ammonia or ammonium ions reacts with the potassium persulfate coloring reagent in the presence of an alkaline environment and a sensitizer to form a colored complex. The analyzer detects this change in color and converts this change into a total nitrogen output. The amount of colored complex formed is equivalent to the total amount of nitrogen.
The method is applicable to wastewater with total nitrogen in the range of 0-50 mg/L. Excessive calcium and magnesium ions, residual chlorine or turbidity may interfere with the measurement.

技术参数：

Technical Parameters:
1.Scope of application：This product is suitable for wastewater with total nitrogen in the range of 0-50mg/L.
2.Test Methods：Potassium persulfate digestion spectrophotometric detection
3.Measuring range：0-50mg/L
4.Lower limit of detection：0.02
5.Resolution：0.01
6.Accuracy：±10% or ±0.2mg/L (the larger of the two)
7.Repeatability：5% or 0.2mg/L
8.Zero drift：±3mg/L
9.Range drift：±10%
10.Measurement cycle：The minimum test period is 20min. According to the site environment, the color   

   development time can be arbitrarily modified from 5 to 120 minutes.
11.The sampling period：Interval (adjustable), hour or trigger measurement mode, can be set
12.Calibration cycle：Automatic calibration (1-99 days adjustable), according to the actual water sample,        

   manual calibration can be set
13.Maintenance cycle：Maintenance interval is greater than 1 month, about 30min each time
14.Man-machine operation：Touch screen display and command input
15.Self-test protection：Self-diagnosis of the working state of the instrument, no data will be lost after abnormal    or power failure; after abnormal reset or power-off call, the instrument automatically removes residual reactants    anautomatically resumes work.
16.Data storage：Not less than half a year of data storage
17.Input interface：Switch
18.Output Interface：2-way RS232 digital output, 1 channel 4-20mA analog output
19.Working environment：Indoor work, recommended temperature 5-28 °C, humidity ≤90% (no condensation)
20.Power and power consumption：AC230±10%V, 50-60Hz, 5A
21.Size：Height 1500 × width 550 × depth 450 (mm)

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