Founded in 1999, Luoyang Sigma Instrument Manufacture Co., Ltd is a high-tech enterprise specialized in R&D and manufacture of all kinds of muffle furnace, industrial furnace, tube furnace, vacuum furnace and high temperature furnace. Sigma covers an area of about 40 acres, including 8000 m2 standardized plant and office buildings, 1500m2 administrative and marketing center and 1500m2 ultra-high temperature engineering and technical research and development center. It also possesses four advanced production lines of lab furnace, industrial furnace, ceramic fiber board and furnace chamber, and ultra-high temperature ceramic fiber. In 2006, Sigma was a pioneer to develop the ceramic fiber type artificial intelligence box resistance furnace and regarded the over temperature value of 1-3 degrees Celsius as one of the standards to control the temperature in box resistance furnace, the comprehensive performance of which reached the advanced level of international brands. Sigma, therefore, became a well-known brand in laboratory industry. In 2006, Sigma achieved the ISO 9001:2008 International Quality System Certifications. Meanwhile, the scientific and management level are improving continuously. Up to now we have obtained 50 technology patents and lots of intellectual properties. In 2010, Sigma invented the diboride and zirconium composite ceramic heating elements and thermocouples, the maximum working temperature of which can reach 2600 degrees Celsius. These ultra-high temperature sensors can work in both vacuum and oxidizing atmosphere, marking the history of measuring the maximum temperature in contact-type under oxidizing atmosphere. In 2011, Sigma set up an Ultra-high Temperature Sintering Experiment and Engineering Center engaged in various sintering experiments at the range of 1000-3000 degrees Celsius, becoming the first high temperature laboratory in China available to the domestic and abroad.</p>