The VT-7910 Fully Automatic Laboratory Water Quality Analysis System is based on standards such as HJ/T 399-2007 Rapid Digestion Spectrophotometry, USEPA Digestion Colorimetry, and HJ 536-2009 Salicylic Acid Method. It integrates functions such as automatic sample addition/reagent dosing, stirring, mixing, cleaning, digestion, and measurement. It aims to achieve a high degree of automation throughout the experimental process, improve the accuracy and precision of experimental data, and reduce the harm of laboratory chemical reagents to laboratory personnel. Ensure the water quality testing and analysis process operates safely, accurately, and effectively.

Measurement Parameters:

COD and ammonia nitrogen

Typical Applications:

Petrochemical, municipal, environmental protection, third-party testing, and other industries

Instrument Features:

● Fully automated sample pretreatment and measurement processes, freeing up manual labor and enabling unattended operation.

● Dual-furnace design, capable of large-scale sample preprocessing and measurement

● Requires less reagent, making it safer and more environmentally friendly, using pre-prepared reagents with hash 16mm COD and 13mm TNTplus

● Uses a high-precision injection pump to achieve accurate sample addition, reducing manual experimental errors

● Automatic cleaning of the inner and outer walls of the injection needle prevents cross-contamination and reduces memory effectiveness

● Automatic stirring easily achieves homogenization of particulates and suspended matter in samples

● Intelligent human-machine interface, simple and easy to use, capable of automatically generating reports and data output

● Automatic rotation of the robotic arm, multi-point color comparison, automatic equalization, eliminating measurement interference for more accurate measurement

Technical Specifications
Measurement parameters	COD and ammonia nitrogen
Measurement method	COD: 2-hour standard method and 20-minute fast method; Ammonia nitrogen: salicylic acid method
Meets the standards	COD standard: 20-minute rapid method complies with HJ/T399-2007 "Determination of Chemical Oxygen Demand in Water Quality - Rapid Digestion Spectrophotometry Method"; The 2-hour standard method complies with the U.S. Environmental Protection Agency (USEPA) 5220D standard method: ammonia nitrogen: Complies with HJ 536-2009 "Water Quality - Determination of Ammonia Nitrogen - Salicylic Acid Spectrophotometry Method" Spectrophotometric unit: complies with JJG178-2007 "Verification Procedures for Ultraviolet, Visible, and Near-Infrared Spectrophotometers."
Measurement range	2-hour standard COD: low range (3~150 mg/L); High range (20~1500 mg/L); Ultra-high volume (200-15000 mg/L) 20-minute rapid COD: low range (15-150 mg/L); High range (100-1000 mg/L) Ammonia nitrogen: low range (0.015-2 mg/L); High range (2-47 mg/L).
COD reagent is resistant to chlorine interference	Low and high range: chloride ions<2000 mg/L; Ultra-high range: chloride ion < 20,000 mg/L;
Number of sample bits	48 bits;
Number of digits	96-bit, dual-furnace digestion design;
Digestion temperature	Room temperature~190°C, 2-hour method program default digestion temperature 150°C, 20min quick method program default digestion temperature 165°C;
Resolution time	2 hours or 20 minutes, and you can also customize the dissolution time
Eliminates temperature indication errors	±1℃；
Temperature uniformity is resolved	≤1℃；
Cooling method	Auxiliary air cooling device to accelerate cooling and cooling the reagent tube after digestion;
Calibration curve	The instrument has built-in calibration curves for COD and ammonia nitrogen pre-prepared reagents with different ranges;
Injection volume	0-10ml, supports customization;
Injection accuracy	≤1%；
Injection method	Direct contactless injection technology for injection pumps;
Cleaning function	Automatically cleans the inner and outer walls of the injection needle after injection;
Dilution function	Supports automatic dilution;
Allows sample particle sizes	160 μm；
Multipoint colorimetric measurement	Supports automatic rotation of pre-prefabricated reagent tubes, enabling multi-point colorimetric measurement and automatic average calculation;
Communication method	Supports uploading data to the LIMS system (users must provide data interfaces);
Instrument control method	PC software;
Warning function	If the pre-prepared reagent tube cannot be unscrewed, the instrument will trigger an alarm alert;
Power requirements	AC220V±10%，50Hz，2750W
Operating temperature and humidity	15℃~35℃； Relative humidity: 15%~80%;
External air source	Air pressure 6bar (87psi)~6.5bar (94psi); Airflow: 12.3L/min (3.25 gals/min);
Instrument size	1200 mm x 1100 mm x 850 mm (length x height x depth);

Mailing Address: Building B, No. 168 Jinyan Road, Jianxin Town, Cangshan District, Fuzhou

Postal Code: 350007

Customer Service Hotline: 400-668-8627

Main Line/Fax: 0591-83305533/83305866

Email: fgwater@fuguang.com

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