ClearSign Technologies Corporation
ClearSign Technologies Corporation (NASDAQ: CLIR) designs and manufactures patented ceramic-based combustion technology achieving sub-5ppm NOx emissions, serving refineries, petrochemical plants, midstream gas processors, and industrial boiler operators through OEM and channel partnerships including Zeeco.
- Company typePublic
- Founded2008
- HeadquartersSeattle, United States
- Headcount11–50
- GTM typeB2B
- OfferingHardware or Manufacturing
What ClearSign Technologies Corporation does
ClearSign Technologies Corporation (NASDAQ: CLIR) is a publicly traded industrial technology company founded in 2008 and headquartered in Tulsa, Oklahoma, that designs and develops proprietary combustion technology for ultra-low NOx emissions reduction. The company's core platform, ClearSign Core™, is a patented ceramic-based combustion technology that uses a distal metallic flameholder and continuous pilot downstream of the conventional burner location to achieve thorough fuel-air mixing and dramatically lower emissions—achieving sub-5ppm NOx for process burners, sub-2.5ppm for boiler burners, and sub-15ppm for flares, with demonstrated capability to operate on up to 100% hydrogen fuel.
The product portfolio spans ClearSign Core Process Burners for refinery and petrochemical heaters, the M1/M-Series burners for midstream gas processing and power applications, Boiler Burners for industrial and commercial applications, Flares with 99.9%+ destruction and removal efficiency, and ClearSign Eye™ flame sensors that detect pilot flames without electrode contact. The company generates revenue through three streams: hardware sales of combustion equipment (the majority), engineering and testing services (CFD modeling, physical testing, technical sales support), and technology licensing royalties through OEM partnerships.
ClearSign operates an asset-light go-to-market model primarily through strategic channel partnerships, including a global manufacturing partnership with Zeeco Inc. (which produces co-branded Zeeco-ClearSign CS5 burners), California Boiler for boiler and flare solutions, Rogue Combustion for firetube boilers, and Tulsa Heaters Midstream and Devco Process Heaters for M-Series products in midstream applications. Direct sales are employed for retrofit projects. Customers include integrated petroleum companies, super major refiners, petrochemical manufacturers, midstream gas processors, and industrial operators, with disclosed orders from California Refinery (32-burner project), U.S. Gulf Coast Refinery (36-burner order), Texas Gulf Coast Petrochemical Plant (26-burner order), and multiple midstream facilities in the Permian Basin.
ClearSign Technologies Corporation firmographics
Firmographics- Name
- ClearSign Technologies Corporation
- Legal name
- ClearSign Technologies Corporation
- Website
- https://clearsign.com
- Company type
- Public
- Founded year
- 2008
- Operating status
- Operating
- Headcount range
- 11–50 employees
- Short description
- ClearSign Technologies Corporation (NASDAQ: CLIR) designs and manufactures patented ceramic-based combustion technology achieving sub-5ppm NOx emissions, serving refineries, petrochemical plants, midstream gas processors, and industrial boiler operators through OEM and channel partnerships including Zeeco.
- Ownership category
- akta.pro rank
ClearSign Technologies Corporation industry classification
Industry- Product category
- Industrial Combustion Equipment
- akta.pro primary industry
- Leak Detection, Emissions & LDAR Testing (OGI, methane, fugitive emissions) (EUAEAHAL)
Keywords
Where ClearSign Technologies Corporation is headquartered
LocationHeadquarters
- HQ city
- Seattle
- HQ country
- United States
- HQ region
- North America
Offices2 records
Markets served
ClearSign Technologies Corporation business model
Business model- GTM type
- B2B
- Offering type
- Hardware or Manufacturing
- Cost components
- Technology or R&D, Personnel, Operations, Marketing or Sales, Others
Revenue model
- Combustion Equipment Sales: Sale of ClearSign Core™ branded burners, flares, and sensing products through channel partners and direct sales. Products are designed, manufactured and customized through OEM partners who resell the ClearSign-branded equipment. Revenue recognized upon delivery of equipment.
- Engineering and Testing Services: Engineering services including computational fluid dynamics (CFD) modeling, physical testing and demonstration, and technical sales support. These services often precede equipment orders and provide revenue during the sales cycle while demonstrating technology effectiveness.
- Technology Licensing: Technology licensing through partnerships where ClearSign's patented technology is embedded in partner products as 'ClearSign Core™' or 'ClearSign Eye™'. Partners include Zeeco, California Boiler, Rogue Combustion, and heater manufacturers.
Pricing tiers
| Model | Billing | Price |
|---|---|---|
| Unit Pricing | Multi-year contract | Custom project-based pricing through proposal process |
Go-to-market motion2 records
Distribution channels6 records
Marketing channels5 records
ClearSign Technologies Corporation product offering
Product offeringCore offering
ClearSign Technologies Corporation designs, develops and licenses patented ceramic-based combustion technology (ClearSign Core™) and flame-sensing technology (ClearSign Eye™) for industrial burners, flares, and pilot sensors. Its products achieve ultra-low NOx emissions (<2.5ppm for boilers, <5ppm for process burners, <15ppm for flares) and support operation on 100% hydrogen fuel blends. The portfolio targets refinery process heaters, petrochemical heaters, midstream gas processing, industrial boilers, and enclosed flare applications, sold through OEM partners (primarily Zeeco) and direct retrofit sales.
Product overview
ClearSign Technologies Corporation offers a portfolio of advanced combustion and sensing products under the ClearSign Core and ClearSign Eye brands. The ClearSign Core product line includes Process Burners for refinery and petrochemical heaters, M1 burners for midstream gas processing, Boiler Burners for commercial and industrial boilers, and Flares for gas flaring applications—all featuring ultra-low NOx emissions technology. The ClearSign Eye line provides pilot sensors and flame detection systems. The company operates through technology partnerships (Zeeco, California Boiler, Rogue Combustion) for manufacturing and distribution, while ClearSign designs and develops the core combustion and sensing technology. All ClearSign Core products support hydrogen fuel blends up to 100% hydrogen operation.
Differentiator
Problem solved
Functional benefit
Brands
- ClearSign Core: Patented combustion technology platform for process burners, boiler burners, and flares that enables ultra-low NOx emissions and improved fuel efficiency
- ClearSign Eye
- ClearSign Core M1
- Rogue Burner
- EC Sensor
- ClearSign Core Modular Pod Burner
Products and services
- ClearSign Core Process Burner Ultra-low NOx combustion technology for refinery and petrochemical process heaters, achieving sub-5ppm NOx guarantees in fielded applications. Capable of 100% hydrogen operation with round or flat flame configurations for natural and forced draft applications; targets crude, vacuum, hot oil, regeneration gas, reactor feed, reboiler, reformer and delayed coker heaters.
- ClearSign Core M1 Burner Latest innovation in ultra-low NOx combustion for midstream gas processing and power applications. Delivers 2ppm NOx at 3% excess O2, easily retrofittable with industry-standard interfaces, zero CO emissions, and robust design without metal mesh, ceramics or refractory block.
- ClearSign Core Boiler Burner
Quantifiable outcome
- Sub-5ppm NOx emissions consistently achieved in fielded applications across all fuel compositions tested including 100% hydrogen
- +4 more outcomes
Companies that use ClearSign Technologies Corporation
Customer profileNamed customers6 records
Segments5 records
Ideal customer profiles5 records
ClearSign Technologies Corporation technology and API
TechnologyTechnology focussed Yes
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Feature6 records
ClearSign Technologies Corporation partnerships and signals
Strategic signalPartnerships
Six partnerships are on record, tiered core and minor.
- Tulsa Heaters Midstream (THM)coreHeater manufacturer specializing in midstream gas processing industry based in Tulsa, Oklahoma. First adopters of ClearSign Core M1 burner product line over a year ago. Has placed multiple orders for M1 burners for multinational energy company gas processing facilities in West Texas Permian Basin.
- U.S. Department of Energy - National Energy Technology Laboratory (NETL)corePartnership under Small Business Innovation Research (SBIR) program for development and testing of hydrogen-capable flexible fuel burner technology. DOE funded $1.65 million Phase II award. Testing completed at NETL facilities demonstrating sub-5ppm NOx across all fuel blends including 100% hydrogen. Project advancing toward commercial field installations at U.S. refinery and chemical processing facilities.
- Devco Process HeatersminorHeater manufacturer partner selling ClearSign Core M-Series burners for midstream operators. Placed orders for M-Series burners for midstream operator facilities in New Mexico and other locations.
- Zeeco Inc.coreStrategic manufacturing partnership for process burners. Zeeco designs, manufactures and sells co-branded Zeeco-Clearsign CS5 burners achieving sub-5ppm NOx emissions. ClearSign's asset-light model relies on Zeeco's manufacturing infrastructure. Joint participation in hydrogen-compatible burner testing under DOE program.
- California BoilercorePartnership for boiler and enclosed flare solutions. California Boiler combines ClearSign's combustion technology with their extensive boiler installation and service experience for industrial boiler clients. Provides complete ultra-low NOx enclosed flare solutions including flare body, fuel gas train, controls, safety system, and installation.
- Rogue Combustion, LLCminorChannel partner for firetube boiler market. Founded by combustion experts choosing to build from basic principles rather than modifying existing low NOx burner designs. Offers Rogue Burner and Control Series with ClearSign Core™ technology targeting commercial and light industrial boiler applications.
Scale indicators11 records
Recent moves9 records
Expansion highlights5 records
ClearSign Technologies Corporation competitors and assessment
Company assessmentDirect peers
- Zeeco: Zeeco is ClearSign's largest manufacturing partner but also a direct competitor offering its own low-NOx burner and flare product lines to refinery, petrochemical, and midstream customers globally. The two compete for the same end-customers with overlapping burner technology portfolios.
- Honeywell UOP Callidus: Honeywell UOP's Callidus burner division (previously led by ClearSign CEO Jim Deller) supplies ultra-low NOx process burners to refineries and ethylene plants. Direct competitor in ClearSign's core refining/petrochemical heater market with comparable sub-5ppm NOx offerings.
- Bloom Engineering: Bloom Engineering designs and manufactures low-NOx process burners and flares for refinery and petrochemical heaters, directly competing with ClearSign Core process burners in the same end-markets with similar technology positioning.
- SAACKE: SAACKE is a global combustion technology provider offering low-NOx burners for marine, industrial, and process heating applications. Competes with ClearSign in industrial boiler and process burner segments across international markets.
- Eclipse Combustion: Eclipse Combustion (part of Eclipse Inc.) manufactures industrial burners and combustion equipment, including low-NOx designs for process heating and boiler applications, overlapping with ClearSign's boiler burner and process burner lines.
- CIC (Combustion Components Associates / Coen): Coen Company (now part of CIC/Trinity) designs and manufactures industrial burners including low-NOx burner products for refinery, petrochemical, and boiler applications, directly competing with ClearSign Core process and boiler burners.
Broad incumbents
- John Zink (Koch Engineered Solutions): John Zink, owned by Koch, is a long-established incumbent in industrial burners, flares, and thermal oxidizers serving refining, petrochemical, and oil & gas. Overlaps with ClearSign across process burners, flares, and emissions reduction solutions as part of a much broader combustion portfolio.
- Fives Group (Pillard): Fives Group's Pillard division manufactures industrial burners and flares for refineries, petrochemicals, and power generation. A larger incumbent offering overlapping low-NOx burner technology across global process industries.
Emerging players
- Forbes Marshall: Forbes Marshall supplies industrial burners and combustion solutions, including low-emission designs, primarily to process industries in South Asia and the Middle East. Compares to ClearSign as an industrial burner manufacturer, though primarily regional in scope.
- RJM International: RJM International specializes in low-NOx burner upgrades and combustion optimization for industrial boilers and process heaters. Smaller specialist competing with ClearSign's boiler burner retrofit offerings in the UK and European markets.
Market position
Strengths5 records
Weaknesses5 records
Competitive moat5 records
Key risks6 records
Key highlights7 records
Customer concentration
ClearSign Technologies Corporation social profiles
Digital presenceClearSign Technologies Corporation compliance and trust
Trust signalCompliance2 records
ClearSign Technologies Corporation financial estimates
Financial estimateRevenue estimate
Valuation estimate
ClearSign Technologies Corporation leadership team
Management profileNumber of profiles
Profiles5 records
ClearSign Technologies Corporation funding detail
Funding detailFunding overview
Funding rounds9 records
Investors2 records
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
ClearSign Technologies Corporation M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about ClearSign Technologies Corporation
What does ClearSign Technologies Corporation do?
ClearSign Technologies Corporation designs, develops and licenses patented ceramic-based combustion technology (ClearSign Core™) and flame-sensing technology (ClearSign Eye™) for industrial burners, flares, and pilot sensors. Its products achieve ultra-low NOx emissions (<2.5ppm for boilers, <5ppm for process burners, <15ppm for flares) and support operation on 100% hydrogen fuel blends. The portfolio targets refinery process heaters, petrochemical heaters, midstream gas processing, industrial boilers, and enclosed flare applications, sold through OEM partners (primarily Zeeco) and direct retrofit sales.
Is ClearSign Technologies Corporation a public or private company?
ClearSign Technologies Corporation is a public company. It is classified as public and is currently operating.
When was ClearSign Technologies Corporation founded?
ClearSign Technologies Corporation was founded in 2008. It employs 11 to 50 people.
Where is ClearSign Technologies Corporation based?
ClearSign Technologies Corporation is headquartered in Seattle, United States, in the North America region.
How does ClearSign Technologies Corporation make money?
Three revenue lines are on record. Combustion Equipment Sales are the primary driver. The others are engineering and Testing Services and technology Licensing.
Who are ClearSign Technologies Corporation's main competitors?
Direct peers on record are Zeeco, Honeywell UOP Callidus, Bloom Engineering, SAACKE, Eclipse Combustion and CIC (Combustion Components Associates / Coen). Broad incumbents are John Zink (Koch Engineered Solutions) and Fives Group (Pillard). Emerging players are Forbes Marshall and RJM International.
Does ClearSign Technologies Corporation have an API?
No public API is recorded for ClearSign Technologies Corporation.
What industry is ClearSign Technologies Corporation in?
ClearSign Technologies Corporation's product category is Industrial Combustion Equipment. Its primary akta.pro industry code is EUAEAHAL, Leak Detection, Emissions & LDAR Testing (OGI, methane, fugitive emissions).