The WKT-S550C Portable COD, Ammonia Nitrogen & Total Phosphorus Analyzer is a professional ammonia nitrogen testing instrument designed and manufactured by VicoMeter specifically for industrial wastewater testing. Developed in accordance with HJ/T 399-2007 “Water Quality — Determination of Chemical Oxygen Demand — Rapid Digestion Spectrophotometric Method”, HJ 535-2009 “Water Quality — Determination of Ammonia Nitrogen — Nessler's Reagent Spectrophotometry”, and GB 11893-89 “Water Quality — Determination of Total Phosphorus — Ammonium Molybdate Spectrophotometric Method”, it is compact and portable, delivering reliable and stable results — a trusted assistant for industrial wastewater testing.
The WKT-S550C COD, Ammonia Nitrogen & Total Phosphorus Analyzer integrates VicoMeter's proven water quality analysis technologies into a more complete analysis system. Its multi-channel design, integrated digestion-and-colorimetry tube, mature colorimetric technology, and stable system combined with proprietary algorithms make operation simpler, testing faster, and results more stable and reliable.
VicoMeter is an expert in analysis and testing, providing fast, targeted industry solutions for different users.
Product Details
WKT-S550C COD, Ammonia Nitrogen & Total Phosphorus Analyzer
(Click image to enlarge)
The WKT-S550C Portable COD, Ammonia Nitrogen & Total Phosphorus Analyzer is a professional ammonia nitrogen testing instrument designed and manufactured by VicoMeter specifically for industrial wastewater testing. Developed in accordance with HJ/T 399-2007 “Water Quality — Determination of Chemical Oxygen Demand — Rapid Digestion Spectrophotometric Method”, HJ 535-2009 “Water Quality — Determination of Ammonia Nitrogen — Nessler's Reagent Spectrophotometry”, and GB 11893-89 “Water Quality — Determination of Total Phosphorus — Ammonium Molybdate Spectrophotometric Method”, it is compact and portable, delivering reliable and stable results — a trusted assistant for industrial wastewater testing.
The WKT-S550C COD, Ammonia Nitrogen & Total Phosphorus Analyzer integrates VicoMeter's proven water quality analysis technologies into a more complete analysis system. Its multi-channel design, integrated digestion-and-colorimetry tube, mature colorimetric technology, and stable system combined with proprietary algorithms make operation simpler, testing faster, and results more stable and reliable.
VicoMeter is an expert in analysis and testing, providing fast, targeted industry solutions for different users.
This instrument is widely used in emergency monitoring, industrial wastewater, domestic sewage, wastewater treatment, pharmaceuticals and chemicals, food, beverages, textile printing and dyeing, electroplating, papermaking, petroleum and metallurgy, river treatment, research institutes, universities, and other fields.
The interactive human-machine interface features prompt functions that indicate the next step, intelligently guiding users through the operation with direct readout of test results.
For each data set, the instrument measures the water sample 10 times, removes outliers, and averages the results to reduce measurement error, while flagging any abnormal results.
Mature colorimetric technology and a stable system combined with proprietary algorithms minimize the impact of dirty, scratched, or flawed glass tubes (including fingerprints) on results. Paired with VicoMeter's dedicated integrated digestion-colorimetric tubes, stability is no longer a challenge.
Equipped with one Ethernet, one USB, and one Mini USB port, the instrument easily connects to a computer for data upload, and data can also be uploaded over the LAN via the Ethernet interface, facilitating daily water quality management and analysis and providing data support for the stable operation of wastewater treatment;
The favorite programs function lets users add frequently used test programs to their user programs for quick access, avoiding the inefficiency of searching through program lists.
Built-in fast measurement and stable measurement modes allow users to freely choose between speed and accuracy.
The instrument features printing and data storage. Results can be printed immediately (optional Bluetooth printer) or printed from historical records. With built-in storage for 30,000 sets of historical test data, users can retrieve data anytime or upload it to a PC for unlimited permanent storage.
VicoMeter's integrated digestion-colorimetric tubes work seamlessly with the rapid water quality analyzer and are compatible with φ16 mm and φ25 mm cuvettes.
● Testing complies with national, industry, or international standards.
● Built-in standard test programs, expandable, including but not limited to the following parameters
- COD (Chemical Oxygen Demand)
- CODmn (Permanganate Index)
- Ammonia Nitrogen (NH3-N)
- Total Phosphorus (TP)（TP）
- Total Nitrogen (TN)（TN）
- Turbidity (NTU)
- Total Chromium (TCr)
- Hexavalent Chromium（Cr 6+）
- Copper (Cu)
- Nickel (Ni)
- Zinc (Zn)
- Iron (Fe)
……
Working Principle Diagram of the COD, Ammonia Nitrogen & Total Phosphorus Analyzer
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1. Multi-Channel Light Source System
The multi-channel light source system uses fixed wavelengths, eliminating the need for wavelength adjustment, with no mutual interference between light sources.
2. Integrated Digestion-Colorimetric Tube
Digestion and reading share a single tube, eliminating the need to transfer liquid into a cuvette for measurement—simple, safe, and worry-free.
3. Interference Elimination
Excellent tube uniformity and light transmittance minimize the impact of dirty, scratched, or flawed glass tubes (including fingerprints) on results.
4. Ten Measurements with Outlier Removal
Each data set is measured 10 times; after outliers are removed, the result is calculated using a dedicated algorithm to reduce measurement error.
5. Data Analysis
Sample concentration values are displayed directly, with prompts for abnormal results. Test results can be printed or stored.
6. Data Processing
Data can be uploaded to a computer via USB or LAN, facilitating daily management and analysis and providing data support for the stable operation of wastewater treatment;
WKT-6B Portable Digestion Instrument
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The WKT-6B Multi-Parameter Intelligent Digestion Instrument is a water pollutant digestion device designed by VicoMeter for industrial pollution sources. It supports digestion of routine pollution parameters such as chemical oxygen demand (ammonia nitrogen), total phosphorus (TP), total nitrogen (TN), and total chromium (TCr). Standard ammonia nitrogen, TP, and TN working modes are built in, requiring no additional setup — digestion starts with one touch. Intelligent PID control ensures accurate temperature control with real-time digestion status display. Alarm prompts at each test stage make testing more efficient; a protective cover and over-temperature protection ensure safer digestion; and user-defined functions allow free setting of digestion temperature and time, truly delivering multiple functions in one instrument.
1. Standard 6-position digester; optional 16-, 25-, or 30-position digesters to better meet user needs.
2. Intelligent PID temperature control and dual over-temperature protection deliver safe, uniform, and fast heating.
3. Built-in standard digestion programs with one-touch design—simply press OK to complete the entire digestion process.
4. Custom mode support allows freely setting digestion temperature and time for one-touch digestion in the desired mode.
5. Suitable for digestion of ammonia nitrogen, total phosphorus, total nitrogen, total chromium, and other items.
Technical Specifications
| Measured Parameters | COD |
| Measuring Range | 0-15000 mg/L (segmented) |
| Chloride Interference | 1000mg/L |
| Detection Limit | 5mg/L |
| Digestion Conditions | 165℃，15min |
| Measured Parameters | Ammonia Nitrogen |
| Measuring Range | 0-50 mg/L (segmented) |
| Detection Limit | 0.01mg/L |
| Digestion Conditions | No Digestion Required |
| Measured Parameters | Total Phosphorus (TP) |
| Measuring Range | 0-20 mg/L (segmented) |
| Detection Limit | 0.02mg/L |
| Digestion Conditions | 125℃，30min |
| Measurement Error | ≤±5％ |
| Repeatability | ≤±5% |
| Optical Stability | ≤±0.001A/20 min (100,000-hour service life) |
| Colorimetric Method | Colorimetric tube (digestion & colorimetry combined) |
| Data Processing | 30,000 records and 96 curves (supports user-defined calibration) |
| Data Transfer | USB cable, LAN, etc. |
| Printer | Optional portable Bluetooth printer |
| User Interface | Chinese/English (optional) |
| Power Supply | 5V rechargeable lithium battery |
| Display | Color LCD |
| Power | 0.3W |
| Ambient Temperature | 5~40℃ |
| Ambient Humidity | ≤85%, non-condensing |
| Unit Dimensions | 240mm*95mm*80mm |
| Instrument Weight | Main unit < 0.5 kg |
| Test Items | Range (mg/L) | Detection Limit | Test Standards |
| COD | 0-15000 | 5 | HJ/T 399-2007 |
| Permanganate COD | 0-10 | 0.1 | GB/T 11892-1989 |
| Ammonia Nitrogen | 0-50 | 0.05 | HJ535-2009 |
| Total Phosphorus (TP) | 0-20 | 0.02 | GB/T 11893-1989 |
| Total Nitrogen (TN) | 0-100 | 0.5 | Alkaline potassium persulfate oxidation method |
| Turbidity | 0-1000NTU | 0.5 | GB/T 13200-1991 |
| Suspended Solids (SS) | 0-500 | 5 | GB/T 11901-1989 |
| Chromaticity | 0-500 degrees | 5 | GB/T 11903-1989 |
| Hexavalent Chromium | 0-5 | 0.01 | GB/T 7467-1987 |
| Chromium | 0-5 | 0.01 | GB/T 7466-1987 |
| Copper | 0-50 | 0.05 | GB/T 7731.3-2008 |
| Nickel | 0-4 | 0.1 | GB/T 11910-1989 |
| Zinc | 0-15 | 0.05 | Xylenol orange method (EPA-recognized method) |
| Iron | 0-50 | 0.01 | HJ/T 345─ 2007 |
| Phosphate | 0-20 | 0.02 | GB/T 11893-1989 |
| Sulfate | 0-200 | 5 | HJ/T342-2007 |
| Sulfide | 0-4 | 0.01 | GB/T 16489-1996 |
| Cyanide | 0-1 | 0.004 | HJ/T 27-1999 |
| Fluoride | 0-10 | 0.02 | HJ 488-2009 |
| Nitrate Nitrogen | 0-20 | 0.5 | Chromotropic acid spectrophotometric method (EPA-recognized method) |
| Nitrite | 0-1 | 0.002 | GB/T 7493-1987 |
| Residual Chlorine | 0-10 | 0.1 | HJ 586-2010 |
| Total Chlorine | 0-10 | 0.1 | HJ586-2010 |
| Chlorine Dioxide | 0-10 | 0.05 | DPD spectrophotometric method |
| Silica | 0-5 | 0.1 | HZ-HJ-SZ-0148 |
| Volatile Phenols | 0-10 | 0.1 | HJ 503-2009 |
| ... | ... | ... | ... |
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