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Our Products. Your Solution.

We are committed to developing innovative and differentiated combustion solutions. Our technologies for new systems and retrofits include sub 5 ppm NOx guarantees, no flame impingement, low CO emissions and reliable flame detection. ClearSign enables businesses of every scale the opportunity to incorporate combustion solutions that not only meet or exceed their operational and financial needs and goals, but also dramatically improve environmental impact.

ClearSign Technologies Corporation Receives Concluding Purchase Order for California Refinery Multi Heater Project

November 30th, 2022|Homepage News, Investor News, Press Releases|

Order Comprised of 16 Burners, Control Equipment and Spare Parts   TULSA, Okla., November 30, 2022 – ClearSign

ClearSign Technologies Corporation Receives Follow On Purchase Order for California Refinery Multi Heater Project

September 1st, 2022|Homepage News, Investor News, Press Releases|

Project Timeline Moved Forward   TULSA, Okla., September 1, 2022 – ClearSign Technologies Corporation (Nasdaq: CLIR) (“ClearSign” or

ClearSign Technologies Corporation Announces Enclosed Oxidizer Sale to Canada Based Hydrogen Technology Production Company

August 23rd, 2022|Homepage News, Investor News, Press Releases|

TULSA, Okla., August 23, 2022 – ClearSign Technologies Corporation (Nasdaq: CLIR) (“ClearSign” or the “Company”), an emerging leader

Research & Development

We are creating new and improved technologies that offer unique solutions to some of the world’s most pressing productivity, energy efficiency and pollution problems affecting the energy, oil and gas production, boiler and processing industries.  At our testing facility in Seattle, our team strives to develop solutions that increase emissions efficiency while maintaining our focus on durable, cost-effective solutions.


A Solution for All Industries

Regulatory mandates are the common theme among the industries ClearSign serves. We are the trusted leader in combustion solutions by providing unmatched innovation, quality and service in the industries we engage.

Heater with Ultra Low Sub 5ppm NOx process burner

Industrial Segments for Heater Technologies

  • Refinery
  • Petrochemical
  • Reforming
  • Midstream Oil and Gas


Industrial Segments for Boiler Technologies

  • Chemical
  • Food
  • Steel
  • Cement
  • Residential Heating
  • Refinery
  • Petrochemical

Enclosed Combustor in snow on oilfield production site

Industrial Segments for Flaring Technologies

  • Upstream Oil and Gas
  • Midstream Oil and Gas
  • Downstream Oil and Gas
  • Biogas
  • Wastewater


Industrial Segments for Sensing Technologies

  • Power and Steam Generation
  • Refinery
  • Flaring

  • Jeff Lewallen ClearSign Employee

Featured Customers & Partners

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