ClearSign Technologies (CLIR)

Its core offering is ClearSign Core, a burner technology platform used in process heaters, boilers and other combustion equipment. The technology is intended to lower nitrogen oxide emissions and support cleaner combustion without requiring the same level of external post-combustion controls often used in industrial settings. ClearSign has demonstrated its technology in full-scale industrial test furnaces and boilers, and customer installations are operating in commercial applications.

The company’s product portfolio includes process burners, boiler burners, flare-related solutions, midstream and power market products, and ClearSign Eye, a sensing technology used to monitor combustion characteristics. These offerings are aimed at sectors such as refining, petrochemicals, power generation, upstream and midstream energy, and other industrial facilities that rely on high-temperature combustion processes.

ClearSign operates as a specialised technology provider within the broader decarbonisation and emissions-control market. Rather than producing fuel or operating industrial plants, it supplies equipment and intellectual property intended to help existing combustion infrastructure operate more cleanly. Its prospects are closely linked to regulatory pressure on industrial emissions, customer capital spending, adoption of new burner technologies, and the company’s ability to convert technical validation into broader commercial sales.