PENSACOLA, FL April 4, 2025; ESC Spectrum, a leading provider of environmental compliance solutions, is excited to announce the successful demonstration of Integrated Path CEMS for air emissions monitoring and reporting. This cutting-edge technology provides a cost-effective solution that yields faster and more representative measurements, eliminates sample system biases and failure mechanisms, and reduces O&M costs and burdens.
The Clean Air Power Division of the EPA fully supports ESC Spectrum’s Integrated Path CEMS and has given the “green light” to provide this compliance option to facilities. They agree that the ESC Spectrum IP CEMS, as designed, meets the requirements of 40CFR Part 75.
The IP CEMS Project
Over the past year, ESC Spectrum worked with EPRI’s Program 233 (the Emissions Monitoring and Measurement Team), Unisearch Associates, Inc., and utilities to demonstrate a compliant IP CEMS solution that measures the gas concentration along an optical path in the stack or duct cross-section for gas turbine combined-cycle units (GTCC).
“It has been incredibly rewarding to develop an IP CEMS solution in coordination with EPRI, Unisearch, and various utility members. From concept to compliance, our goal was to design a system that not only meets the highest technical standards but also aligns with the EPA’s Part 75 rules,” said ESC Spectrum Design Engineer Daniel Champagne. “I’m proud of what our team has accomplished.”
The Benefits of IP CEMS Technology
The benefits of using ESC Spectrum’s IP CEMS employing TDLS and UV DOAS technology to measure NOx, CO2, CO, and NH3 include:
- More representative measurements with integrated path technology, eliminating sample transport and potential measurement biases and providing faster responses to changes in emissions concentrations.
- Cost savings due to reduced calibration gas consumption and labor costs, less power usage, fewer emergency repairs, and spare parts for maintenance.
Industry Leadership
ESC Spectrum has been a leader in air emissions monitoring and reporting for over 50 years, continually developing new hardware and software solutions to best serve customers. “It is an exciting time to be in the emissions compliance industry. We are proud to be at the forefront of innovative new technology to potentially reduce CEM system costs while improving measurement accuracy,” said Jeff Rabensteine, President of ESC Spectrum.
Learn More
Contact us to talk to an expert and see if this solution is right for you.
Read our blog post on Understanding New In-Situ Optical Monitoring Technology by EPRI Technical Executive Richard Himes, P.E. here.
Going to the EPRI CEMUG Conference, May 20-21, at the Westin Peachtree in Atlanta, GA? Attend presentations from those guiding the IP CEMS project:
- Assessing the Applicability of Integrated Path Continuous Emission Monitors (IP-CEMs) to Current Part 60 and 75 Monitoring Requirements (5/21 @ 3:20 p.m. CDT with Brian Perlov, PE and Daniel Champagne)
- Field Trial of a Nox, CO, CO2, NH3 IP-CEMs Utilizing an Alternative Cal Gas Validation Design (5/21 @ 4:20 p.m. CDT, with Greg Banchiere and Clay Phillips)
About ESC Spectrum
ESC Spectrum is a leading provider of air emissions compliance solutions, offering cutting-edge software, hardware, and services to help facilities meet regulatory requirements efficiently and accurately. With decades of industry expertise, ESC Spectrum continues to support compliance professionals with innovative solutions tailored to their evolving needs.

Anna Wilson | Senior Corporate Marketing Manager
Anna Wilson has 20 years of experience in the energy industry. She is well-versed in branding, communications, content marketing, and project management. Previously, she served as the Corporate Marketing Manager for American Innovations, a supplier of solutions for the oil and gas industry. She spent a decade as a music journalist for magazines, the Austin-American Statesman and Riverfront Times. She has a BA in English Literature from Washington University and a Masters in Literature from University of Missouri-Columbia.