Product Details
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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.
| Parameter | Details |
|---|
| Instrument Name | COD Tester |
| Temperature Control Time | Adjustable from 1 to 9999 minutes |
| Instrument Model | TQCOD-3N |
| Temperature Control Precision | ±0.5°C |
| Measured Item | COD |
| Optical Stability | ≤ 0.002A per 20 minutes |
| Measurement Range | 5 - 2000 mg/L (Measurement after dilution if exceeding the range) |
| Repeatability | ≤ 3% |
| Indication Error | ≤ ±5% (Full Scale) |
| Batch Processing Capacity | 16 water samples (Optional: 20, 25, 36 samples) |
| Chloride Interference Resistance | ≤ 2000 mg/L |
| Display | Color touch screen with Chinese and English display |
| Digestion Temperature | 165°C |
| Instrument Dimensions | Tester: 400mm × 300mm × 140mm
Digester: 260mm × 355mm × 135mm (excluding protective cover) |
| Digestion Time | 15 minutes |
| Weight | Tester: 2.6 kg
Digester: 5.5 kg |
| Temperature Control System | Can be set from room temperature to 200°C |
| Power Consumption | < 500W |
| Normal Use Conditions - Ambient Temperature | 5 - 40°C |
| Normal Use Conditions - Relative Humidity | ≤ 85% |
| Normal Use Conditions - Power Supply | AC (220 ± 22)V; (50 ± 0.5)Hz
No significant vibration and electromagnetic interference, avoid direct sunlight |
The analyzer and the digester are separate, which won't affect the stability of the optical system.
The analyzer is equipped with a cold - light source and a narrow - band interference optical system, featuring good optical stability. During calibration, the light intensity can be adjusted in 16 levels and set arbitrarily, effectively solving the problem of measurement range expansion caused by signal strength.
Both the main unit and the digester are equipped with color touch - screens with Chinese and English displays. The operation interface is user - friendly and comes with an operation guide to explain various function operations.
Curves can be queried. In addition to the curve equation, the standard value of each standard substance during calibration, the corresponding absorbance, calibration time, and calibrator number can also be queried, fully reproducing the calibration state.
It has a one - key recovery function. When the factory - set curves and user - set curve data records are lost due to accidents, one - key recovery can be achieved.
The digester has multi - point error - free calibration, achieving zero - error measurement at the set points and completely eliminating the errors caused by the non - linearity of temperature sensors in common digesters on the market.
The digester has a timing reminder function and can be set to automatically shut down after digestion. The instrument has a secondary protection function. When the temperature of the digester exceeds 200°C, the instrument will cut off the power supply by itself to ensure the safety of the digestion process.
In addition to a maximum of 250 factory - set curves, users can add 3500 curves by themselves, calibrate the curves, and store them in the instrument.
The storage capacity can reach up to 100,000 records (including parameter names, concentrations, units, detection times, operator numbers, etc.).
It has a printing function, allowing for immediate printing of test records or printing of queried records.
It is equipped with a USB interface for connection to a computer.
1 main unit, 1 digester, 1 pipette, 10 digestion colorimetric tubes, 1 test - tube rack, 1 set of COD reagents, 1 USB cable, 1 data acquisition installation CD, 2 power cords, 1 user manual, 1 product certificate of conformity, and 1 warranty card.
Shen ChangHong 
