CEMS Equipment & Shelters
ESC Spectrum delivers top-of-the-line
CEMS Equipment, Racks & Shelters
to tackle the most demanding monitoring challenges required by the EPA.
Our high quality craftsmanship that goes into designing and building your required system is what sets us apart from others. High-quality work means less maintenance over the years, reducing costs. Explore our range of systems and products below and let us enhance your facility’s operations.
ESC Spectrum has decades of experience providing integrated systems for air emissions compliance in various industries and applications.
Our integration specialists are experts in the design and construction process – from understanding permit and regulatory requirements and technical planning to installation, start-up, maintenance, and operation.
ESC Spectrum provides the following integrated systems for EPA Part 75, Part 60, and Part 63 requirements:
- Hazardous area CEM systems
- Dilution CEMS
- Full Extractive Dry Basis CEMS
- In-situ CEMS
- Hybrid CEMS
- Hot/Wet Extractive CEMS
- Mobile testing systems and portable CEMS
- HAPS and hydrocarbon CEMS (for HCl, Mercury, Hydrocarbons – Methane and Non-Methane, H2S, and Total Sulfur)
- CEMS for all major pollutants, including: NOx, SO2, CO, CO2, O2, Flow, Particulate, and Opacity
Excellent work!
Daniel Fefer
Contractor, Exelon
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
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
From The Source Blog

CEMS Fails From the Field: What Went Wrong & How to Fix It
Discover the top causes of CEM system failures and how to prevent them. Get expert troubleshooting advice and maintenance strategies to reduce downtime.

Continuous Emissions Monitoring 101: Calibration Gas & Requirements
This article will discuss and clarify calibration gas requirements for CEMS users including, system calibration, cal gas bottles, and more.

Continuous Emissions Monitoring 101: Extractive CEMS Umbilical
Read this article to learn more about extractive CEMS umbilicals, from construction and installation to maintenance best practices.