Holiday period: May 1st to May 5th, 2025, a total of 5 days; Normal work on May 6th (Tuesday).

On the occasion of May Day, I sincerely thank everyone for their trust and support! Wishing all customers, partners, and colleagues a happy holiday, family happiness, and all the best!

Shenzhen Changhong Technology Co., Ltd. (referred to as "Shenzhen Changhong") was established in 2002 and became a high-tech enterprise in Shenzhen in 2018. For more than 20 years, we have been committed to the research and development, production, and sales of nearly a hundred water quality detection instruments, including COD analyzer, ammonia nitrogen analyzer, total phosphorus analyzer, total nitrogen analyzer, water quality heavy metals, inorganic compounds, etc. Our product technology involves computer, microcontroller software and hardware, optics, chemical analysis, and other technical fields.

At present, the company mainly produces products such as COD analyzer, ammonia nitrogen analyzer, total phosphorus analyzer, total nitrogen analyzer, turbidity meter, residual chlorine analyzer, copper, iron, nickel, zinc, hexavalent chromium, nitrite, sulfide, iodide, volatile phenol, hydrazine, aniline and other detection instruments for hundreds of substances in water. At the same time, the company also produces instruments for measuring physical parameters in water such as pH, conductivity, dissolved oxygen, turbidity, chromaticity, and total hardness.