Founded in 2019, VVNA is a subsidiary of Shenzhen Tongao Technology Co., Ltd., with its headquarters located in Shenzhen. We are a technology-driven enterprise integrated with the R&D, manufacturing, sales, and after-sales service of laboratory water quality analysis instruments, portable water quality testers, online water quality monitoring, and testing reagents. We hold several prestigious certifications and memberships in China: it is recognized as a National High-Tech Enterprise, a Shenzhen Specialized, Sophisticated, Unique and Innovative Enterprise, and a Shenzhen Innovative Enterprise. Additionally, we are an active member of both the China Environmental Protection Industry Association and the China Environmental Monitoring Industry Association.  

Since its establishment, VVNA has been committed to the full integration of technology and practical applications. Through keen insight into customer needs and accurate grasp of industry trends in water quality analysis, we rely on our strong R&D capabilities and profound technical accumulation to rapidly develop targeted and innovative product solutions for water quality testing. Our customer-centric innovations have been widely applied in various fields, including drinking water, groundwater, surface water, municipal wastewater, industrial wastewater, semiconductor ultrapure water, pharmaceutical/power industry water, and other industrial purified water.

As a professional technology enterprise specializing in water quality and hydrological monitoring instruments, VVNA offers a comprehensive product portfolio covering laboratory qualitative/quantitative analysis, on-site analysis, and online analysis and testing. All our products are characterized by high measurement accuracy, reliable operation, simple operation, low maintenance requirements, and compact structure.

VVNA attaches great importance to team building and has recruited a group of dedicated professionals with extensive experience in the water quality analysis industry. Among our team, R&D personnel account for more than 25%, technical support staff account for over 15%, and 100% hold bachelor's degrees or above. In addition, we have long maintained academic exchanges and cooperative relationships with high-end technical talents from prestigious universities such as the University of Science and Technology of China (USTC) and Shenzhen University.

Our goal is to continue providing customers with reliable instruments, complete precast reagents, accurate and diverse testing methods, simple operating procedures, and high-quality customer service. We are committed to continuously improving product quality to meet the ever-changing needs of our customers. Meanwhile, by leveraging comprehensive and advanced testing tools and relying on an efficient expert system, we adhere to the customer-first service philosophy to provide convenient, thoughtful, and efficient services for customers across all over the world.