Analyzers &
Sampling Components
We understand that CEMS analyzers and sampling components are integral to your facility. At ESC Spectrum, we’re your trusted partner, offering tailored solutions that cater to a wide array of applications, including Continuous Emissions Monitoring Systems (CEMS), Process Control, Flares, Natural Gas Analysis, Combustion Control, and Gas Detection. We’re dedicated to providing you with options that not only meet but exceed your regulatory, measurement, and budgetary specifications.
With decades of expertise in analyzer repair, upgrades, calibration, and parts, we’re rooted in a profound understanding of air emissions and decades of hands-on experience with major analyzer brands. Discover some of our preferred vendor partners on our Supplier pages.
Ready to delve deeper into the world of CEMS Analyzers? Learn more about CEMS Analyzers: What They Are and How To Maintain Them on our blog, The Source.
Analyzer & Sampling Component Hardware
ESC Spectrum has decades of experience building high-quality CEM Systems to customers’ unique specifications. Our systems:
- Meet the toughest monitoring challenges
- Are built with high-quality components
- Provide technicians with robust solutions that work and require minimal maintenance
- Are supported by developers, engineers, technicians, and 24/7 customer support experts
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

Air Emissions Calibration Testing: Staying Compliant With Daily and Quarterly Requirements
Accurate air emissions calibration testing is essential for maintaining compliance and ensuring reliable CEMS performance. This blog breaks down daily and quarterly calibration test requirements, explains how offline calibrations are used, and clarifies what causes out-of-control data.

Alliance Technical Group Acquires ESC Spectrum, Cementing Global Leadership in Continuous Emissions Monitoring (CEMS) and Data Acquisition Systems (DAS)
ESC Spectrum is now part of Alliance Technical Group, combining forces to deliver the most comprehensive CEMS and DAS compliance platform in the industry. This strategic acquisition strengthens our ability to serve customers with expanded resources, nationwide support, and end-to-end environmental solutions.

CEMS Probe Maintenance: Extractive vs. Dilution Systems
CEMS probes are the first point of contact with the gas sample line in your emissions monitoring system. Discover why routine maintenance is critical—and how to do it right.