Based in Austin, Texas, ESC Spectrum is a leading provider of products and services for customers in the Electric Power and P ... etroleum industries. For over 50 years, we have been helping our customers meet and report compliance with air emissions standards. Our Data Acquisition System (DAS) software is the market leader in helping industrial and utility plants comply with federal, state, and local air quality regulations requiring Continuous Emissions Monitoring Systems (CEMS). We provide a full suite of CEMS Services, including custom CEMS system design, calibration and repair, training and more, and supply a wide variety of equipment. read more