ClearSign Technologies Corp Dossier
Qualitative Analysis
Business overview
ClearSign Technologies Corp (formerly ClearSign Combustion Corporation) designs and develops patented technologies aimed at decarbonization and improving the operational performance, energy efficiency, and emission profiles of industrial and commercial combustion systems. The company's primary technology, ClearSign Core™, utilizes a porous ceramic or metal flame-stabilizing structure downstream of the burner body to significantly reduce flame length and achieve ultra-low nitrogen oxide (NOx) emissions without requiring external flue gas recirculation, selective catalytic reduction (SCR), or high excess air systems. Its product portfolio includes process burners (such as the 'M' Series), boiler burners, flaring burners, and the ClearSign Eye™ electrical flame sensor. ClearSign operates primarily in the United States and China, serving the energy, refining, chemical, petrochemical, and commercial boiler industries.
Research as of 20 Jun 2026
Strategic Initiatives
Growth programs, investments, and their expected impact
Expanding commercial deployment of the ClearSign Core M1 process burner, specifically targeting the horizontally fired midstream gas processing and petrochemical heater markets.
Expected impact: Establishes high-efficiency, sub-2ppm ultra-low NOx burner technology in commercial operations, driving high-margin spare parts and engineering services revenue.
Developing and testing 100% hydrogen-capable flexible fuel process burners under the DOE's Small Business Innovation Research (SBIR) program.
Expected impact: Positions the company to capture market share in decarbonization and clean-fuel transition projects within the refining and chemical sectors.
Mergers, Acquisitions & Partnerships
Recent deals and strategic collaborations
Strategic Partnerships
Zeeco manufactures ClearSign's burners and provides global market presence, sales resources, and manufacturing infrastructure. The partnership was expanded in late 2024 to launch a co-branded process burner line (Zeeco CS5 and Zeeco Hydrogen CS5).
Terms: Collaborative marketing and sales structure; Zeeco provides manufacturing and R&D testing facilities at its Global Technology Center.
THM integrates ClearSign Core M1 burners into its horizontally fired process heaters, facilitating commercial demonstrations and securing orders for West Texas gas processing facilities.
Terms: Direct purchase orders for burner equipment.