Cemtrex, Inc. provides electronic manufacturing services of custom engineered advanced electronics system assemblies, emission monitors and instruments for industrial processes and environmental control and air filtration systems for industries and utilities. It designs, develops, and manufactures various interconnects and cable assemblies; and provides engineering services, including new product introductions and prototyping, related testing equipment, and product redesigns. The company also manufactures, sells, and services monitoring instruments, software, and systems for measurement of emissions of Greenhouse gases, hazardous gases, particulate, and other regulated pollutants used in emissions trading, as well as for industrial processes; and markets monitoring and analysis equipment for gas and liquid measurement for various downstream oil and gas applications, as well as industrial process applications. In addition, it offers air filtration and environmental control equipment to industries, such as chemical, cement, steel, food, construction, mining, and petrochemicals; instruments for emissions monitoring, process analysis, and controls for industrial applications; and laser opacity monitor that is used to determine opacity or dust concentration in stack gases. Further, the company provides direct-extractive and dilution-extractive continuous emissions monitoring solutions equipment and systems for use with utilities, industrial boilers, FGD systems, SCR-NOx control, furnaces, gas turbines, process heaters, and incinerators; and crude oil and natural gas analyzers. It serves primarily automotive, medical, industrial automation, refining, power, chemical, mining, and metallurgical processing industries. The company was formerly known as Diversified American Holding, Inc. and changed its name to Cemtrex, Inc. in December 2004. Cemtrex, Inc. was incorporated in 1998 and is based in Farmingdale, New York.