Sigma was founded in 1996, possesses 20 national invention patents and multiple intellectual properties. All the patent technology has been industrialized, applied to the company development and got good social benefit. Sigma is the High-Tech Enterprise assessed by the Science and Technology Department of Henan Province and Advanced Unit for Intellectual Property assessed by government.

The rotary bell-type furnace with bottom heating developed by Sigma cooperating with Shanghai Silicate Institute of Chinese Academy Sciences is assessed as Science and Technology Results by the expert panel in 2007. Meanwhile, provided more than ten high-temperature furnaces to the Shanghai Silicate Institute, which are worth more than 2 million Yuan RMB. And this project has been visited by Chinese leaders for many times.

Sigma new developed 2600? ultra-high-temperature ceramic sintering furnace, 2400? ultra-high-temperature vacuum atmosphere tube furnace, 2400? induction smelting furnace, 1600? crucible smelting furnace, 2600?vacuum induction hot-pressed furnace, 2600?ultra-high-temperature softening-point determinator, 2600? ultra-high-temperature melting-point tester, anti-thermal shock test furnace and 2600? ultra-high-temperature thermal shock furnace have been broadly applied to industrial and mining establishments and scientific research institutes. We also product sintering and combustion analyzer, thermal gravimetric analyzer, ultra-high-temperature heating elements, ultra-high-temperature thermocouple, thermocouple checking furnace, artificial intelligent box furnace, 1000?, 1200?, 1600?, 1350?, 1600?, 1700?, 1800? high-temperature box furnace, 2600? ultra-high-temperature heating furnace, bell-type furnace, vacuum atmosphere box resistance furnace, vacuum atmosphere tube resistance furnace, vacuum smelting furnace and so on.