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DPD Residual Chlorine/Total Chlorine Analyzer
The DPD Residual/Total Chlorine Analyzer utilizes the N,N-diethyl-p-phenylenediamine (DPD) colorimetric method, in full compliance with national standard methods. The analyzer reacts DPD with free chlorine in water to form a red-colored compound. The intensity of the color is proportional to the chlorine concentration and is measured photometrically. The built-in calibration curve is used to calculate the concentration of residual or total chlorine.
Product Application
● Drinking Water Monitoring: Water plants, water distribution networks, rural drinking water
● Industrial Applications: Swimming pools, food & beverage, pharmaceuticals, power generation, semiconductors
Key words:
Classification:
- 产品描述
- Product Features
- Performance Index
- Field Application
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DPD余氯/总氯分析仪的余氯测量方法采用国家标准方法DPD分光光度法。其余氯测量原理为DPD试剂与水中游离氯迅速反应生成红色化合物，通过测量红色化合物对特定波长的吸光度，并依据仪器内部校准曲线即可计算出余氯浓度值。DPD余氯/总氯分析仪采用了大光程设计，能实现更低的检测下限；分析仪具备缺试剂、缺水等故障诊断功能，确保测量数据的有效性。余氯测量方法采用国家标准方法DPD 分光光度法。
DPD 与水中游离氯迅速反应生成红色化合物，通过测量化合物对特定波长的吸光度，并依据仪器内部校准曲线即可计算出余氯浓度值。应用领域：
● 饮用水：自来水厂、二次供水泵房、农村饮用水；
● 公共用水：公共卫生用水、游泳池。
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- High Integration: All modules for measurement, display, and data transmission are integrated into a single unit
- Long Optical Path Design: Detection limit down to 0.005 mg/L, ideal for low-level chlorine monitoring in drinking water networks
- Low Reagent Consumption: Adjustable measurement intervals; reagent replacement cycle ≥ 1 month
- Smart Self-Diagnostics: Detects reagent shortage, water supply failure, leakage, and more
- Event Logging: Tracks major operational events and provides trend data for historical analysis
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Parameters
Details
Measuring Range
0–5 mg/L
Detection Limit
0.005 mg/L
Resolution
0.001 mg/L
Accuracy
±5% or ±0.005 mg/L (ppm) as Cl₂, whichever is greater
Response Time
Free Chlorine / Total Chlorine: ≤2.5 minutes
Measurement Interval
Free Chlorine / Total Chlorine: minimum interval 2.5 minutes
Power Supply
220 VAC ±20%, 50/60 Hz
Signal Output
Standard: 1 RS485 interface, Modbus RTU protocol
Optional: 6 × 4–20 mA analog outputs or 6 relay outputsDisplay
7-inch screen
Material
Carbon steel with powder coating
Dimensions
470 × 680 × 279 mm (W × H × D)
Sample Temperature
5–40 °C
Sample Pressure
1–5 bar
Sample Flow Rate
>180 mL/min and <500 mL/min
Operating Temperature
0–40 °C
Relative Humidity
0–95% RH, non-condensing
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Tengine Innovation (Beijing) Instruments Inc.
Email: contact@tengine.com.cn
WhatsApp: +86 133 3109 8301
Address: Floor 6, Building 8, Yard 1,
Nongda South Road, Haidian District, Beijing
Copyright©2022 Tengine Innovation (Beijing) Instruments Inc.
Copyright©2022 Tengine Innovation
(Beijing) Instruments Inc.