Shen ChangHong 
Product Details
Custom Matching
TQCOD-3N COD Tester
Designed in accordance with the latest national standard for COD determination methods;
It is easy to operate, intuitive, and has good precision and stability;
It is equipped with a printing function and USB data uploading function;
It adopts a large-screen color touch screen with Chinese and English display;
It has a one-key recovery function;
Product Overview
It uses sealed catalytic digestion and then conducts colorimetric measurement.
With advanced cold light source, narrow-band interference technology and automatic data processing by microcomputer, it can directly display and print the COD (mg/L) value of the sample.
It is widely applicable to departments such as environmental monitoring, sewage treatment, colleges and universities, and scientific research institutions.
Technical Specifications
Measuring range | COD: 5～200mg/L ；200～2000mg/L（dilute if excess the measuring range） |
Measuring accuracy | 0.1 mg/L；1mg/L |
Indication error | ≤±5 % |
Repeatability | ≤±2% |
Anti-chlorine interference | ≤2000mg/L |
Optical stability | Absorbance drift ≤0 .002A/20min; Light source lifespan 100,000 hours |
Testing standard | HJ/T 399-2007 |
Analytical method | Closed Vessel Digestion and Colorimetric Method (Colorimetric Tubes) |
Digestion capacity | 16 samples per run |
Temperature control system | COD digestion temperature: 165℃；Temperature range: room temperature ~200℃; Accuracy：±0.5℃；Time period：1~9999min |
Digestion period | 15min |
Curve and Storage | 200 factory calibration curves, 3500 user-defined curves; Can store 100,000 records. |
Display | Instrument: 5 inch 800*480 color touchscreen; Digester: 3.5 inch 480*320 color touchscreen |
Printer | Built-in thermal printer |
Power consumption | Instrument: 30W Digester: 300W |
Dimension | Instrument：387mm*292mm*134mm；Digester ：249mm×350mm×199mm |
Weight | Instrument：2.6kg Digester：5.6kg |
Data interface | USB |
Working environment | (1) Ambient temperature: 5~40℃ ⑵ Relative humidity: ≤85% ⑶ Power supply: AC 220 (165V-240V) (4) No significant vibration and electromagnetic interference, avoid direct sunlight. |
Functional Features
1.The measurement instrument and digestion device are separate, ensuring the stability of the optical system.
2.The analyzer features a cold light source and a narrow-band interference optical system, providing excellent optical stability.
3.The main unit and digestion device are equipped with a color touchscreen, offering a user-friendly interface in both English and Chinese. An integrated operation guide provides detailed 4.explanations for various functions.
5.The analyzer supports curve queries; in addition to retrieving the curve equation, users can access the standard values and corresponding absorbance for each calibration standard, along with 6.calibration timestamps and operator IDs, fully replicating the calibration conditions.
7.The digestion device features multi-point error-free calibration, achieving zero-error measurements at set points and completely eliminating errors commonly associated with non-linear 8.temperature sensors in other digestion devices on the market.
9.Digester includes a timed reminder and an automatic shut-off function after digestion. The instrument is equipped with a secondary protection feature: if the digestion device temperature
10.exceeds 200 degrees Celsius, the power supply will be automatically cut off to ensure safe operation during the digestion process.
11.In addition to the 200 factory-set calibration curves, users can add and store up to 3,000 custom curves within the instrument.
Storage capacity reaches 100,000 records, including parameter names, concentrations, units, detection times, and operator IDs.
The analyzer also features a printing function, allowing immediate printing of test records or retrieval of previously printed records.
A USB interface enables connection to a computer for easy data transfer.
Packing List
Main Unit: 1 piece
Digester: 1 piece
Pipette: 1 pipette
Colorimetric cuvette: 10 cuvettes (16*110mm)
Tube rack: 1 piece
Reagent; 1 kit
USB cable: 1 piece
Manual: 1 copy
Certificate of Conformity: 1 copy
Warranty Card: 1 copy
