CEMS Services

ESC Spectrum has performed a variety of CEMS maintenance, repair, and testing services since its founding in 1981 by a field technician. We were the first company to certify a CEMS in accordance with Part 75 regulations and began stack testing and building shelters in 1991.
After decades of experience, we’ve seen it all: our team of experts is well-versed in solving unique challenges. We understand EPA test methodologies, repair analyzers, umbilical systems, and other CEMS equipment and have a deep knowledge of CEMS operations.

Michael is always very professional and knowledgeable.
I am always confident things will be resolved quickly with him.
Dave Patterson
Consulting Engineer (Air Quality Group), Ameren
ESC Spectrum has provided excellent engineering and procurement support.
Juan Cantu
Analyzer Specialist, ENglobal
Alex was very helpful in resolving the issues that I brought to him.
Kevin Bugay
Process Engineer, Cardinal Corporation
Even though we are only data logger users, the support staff has always been extremely nice,
very timely and completely knowledgeable on the topic at hand.
John Markely
Sr. Environmental Engineer, Kyger Creek
Very helpful, understood my issue and found the fix I needed.
Dane Ruberg
Instrument Technician, Xcel Energy
Scott is fantastic, very knowledgeable and very helpful!
Always know I am going to get the help I need when he answers the phone.
Celena Arreola
Environmental Engineer, El Paso Electric
Outstanding customer service!!!
Rick Gregory
IT Specialist/Network Admin, Calumet Specialty Partners
The customer service provided was quick and the agent sent additional information.
Ann Woods
Environmental Scientist, Agua Fria Generating Station
Excellent work!
Daniel Fefer
Contractor, Exelon
From The Source Blog

Continuous Emissions Monitoring 101: Oxygen & Flow Analyzers
Read this article to learn more about two of the most reliable analyzers in the CEMS world: oxygen and flow.

The EPA’s Good Neighbor Plan – Response to Judicial Stays
On July 31, 2023, the US EPA issued a final action to address emission sources affected by judicial stays of the Good Neighbor Plan in the following states: Arkansas, Kentucky, Louisiana, Mississippi, Missouri, and Texas. Read our article to learn more about how these final actions might affect your facility.

Continuous Emissions Monitoring 101: CO Analyzers
Read this article to learn more about CEMS Analyzers, specifically NDIR technology used to measure Carbon Monoxide (CO).