GNR company founded in 1942 in Italy, is a high-tech company focusing on the direct reading spectrometer. GNR, brought together a group of technical control from across Europe, geek, not obedience to authority, unsocial chemist, a mathematician, a nuclear physicist. GNR, headquarters is located in the outskirts of milan, Italy at the foot of the Alps, European large hadron collider (LHC) only 80 kilometers. Has now become the world's leading scientific instrument group co., LTD., has distributed in Britain, the United States, Germany, Finland, Denmark and China and global production branches or offices, its products and services have been extended to more than one hundred countries and regions. The company belongs to high-tech industry, its products include precision analysis instruments, total reflection diffraction, residual stress, oil, handheld fluorescence spectrometer, etc.

In the process of high speed development of more than seventy years, GNR company by virtue of the advantage of scientific research, with advanced technology, excellent management and unique products to promote the development of science of the world have made great contribution. GNR, scientists from 1942 began manufacturing in Europe's oldest spectrometer, production began in 1959 with a photomultiplier tube as a direct reading spectrometer detector single channel scan mode (this instrument is displayed in the Italian spectral instruments museum). In 1980, because the two spectroscopist Mario Gungui and Antonio Nigro special contribution to the direct reading spectrometer, the company decided to their surnames named GNR company.

GNR company always pay attention to and support the development of China, its products in 20 years ago have entered the Chinese market, with China's scientific research, education and industry cooperation has been effective. GNR, customers all over the country, the user has more than thousand, and the vast majority of users use fixed number of year for more than eight years. GNR, 2014, the company increased investment in the Chinese market, respectively in Beijing, Shanghai, guangzhou, zhengzhou, xi 'an, shenyang and other places set up representative office, the national customer service support center was established in Shanghai, in henan province has a professional sales and after-sales team. GNR company users throughout the country has more than 30 provinces, municipalities and autonomous regions, products and services has been well received by the majority of users.

ELTRA company founded in 1981 the German town of industrial zone in northwestern Dusseldorf NEUSS, ELTRA is specialized development and production of the gas analysis instrument manufacturers, after decades of development, has become the world's famous gas instrument manufacturer. Many large enterprises and research institutes to use henan ELTRA instrument, because it's durable, low failure rate, was deeply loved by the masses of users, henan.

Zhengzhou DE jian hui technology co., LTD, is a GNR, ELTAR company set up in henan province's total dealer, with sales and after-sale one-stop services, solve the instrument abroad in henan problem without fixed after-sales service. We use the most sincere service, transfer of Europe's top testing instrument for you, hope for you to solve the problem in the field of industrial testing, contribute strength!