CEMS Experts

Since 1992
a division of GK Associates

Environmentally Responsible. Business Friendly.

CALL NOW (805) 523-8700 or email


About Us

For over 20 years, CEMS Experts has been providing turn-key CEMS solutions, consulting, and technical support services for the emissions compliance and process monitoring needs of our clients. Our customer base spans many industries including power generation, petro-chemical, cement, glass, forest products, landfills, municipal utilities, waste-energy, and many others. We have provided unparalleled technical support and excellent customer service for our clients that own and operate a variety of CEMS gas analyzers and supporting equipment in the US and worldwide.

Always on the forefront of technology, CEMS Experts has successfully delivered, supported, serviced and trained our clients using the most advanced technologies available. Our deep knowledge and understanding of these technologies has allowed us to provide the best solution for our customers with the lowest total cost of ownership (TCO), by matching the right products and designs for each application. We have integrated state of the art instrumentation and hardware from many suppliers such as Sick-Maihak, Thermo Environmental, Teledyne-Advanced Pollution Instrumentation (TAPI), Ametek, California Analytical Instruments, M&C Products, Rosemount Analytical, and many others.

CEMS Experts offers a variety of products and services for all our customers’ CEMS needs from complete custom CEMS to temporary rental CEMS, data acquisition systems (DAS), service & support contracts, training, permitting and consultation, etc. We have helped many of our clients meet EPA compliance requirements for a new installations, help optimize diesel fired engine or burner combustion processes to lower fuel costs, and understand rapidly changing local, state, or federal emissions requirements that affect their business. We are a “one-stop-shop” for myriad CEMS products and services. Please visit our products and services pages to learn more.


“CEMS Experts’ technical knowledge of the finer points of Air Pollution Monitoring Systems is superior. They are one whom I have enjoyed working with to solve complicated issues with mutual clients. CEMS Experts’ engineers are always professional in appearance and demeanor”.

– Steven Croghan, Sr. Project Manager-Air Measurements at TRC Companies, Inc.


Geoffrey Klotz, President and CEO of CEMS Experts has over 25 years of experience in the ambient and fixed source emissions monitoring industry. Using his educational background in electronics, engineering and industrial technology, he worked in various technical capacities over his 11 year career at Hewlett Packard. In 1989 he co-founded and helped grow the startup Altech Systems Corporation into a very successful CEMS integration company, which was sold to Waste Management. After the sale of Altech in 1992, Geoff founded his own CEMS integration and services organization GK Associates, which was rebranded to “CEMS Experts” in 2011. Utilizing a network of highly trained independent contractors and partners, CEMS Experts has been able to keep overhead costs low while providing cost-effective solutions to the end user.