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ClearSign Technologies

5 viewers · 30d

Total raised

$1.8M

+$1.8M this year

1 filing since 2026 · latest Equity filed

Cumulative raised
LAST ROUND
Equity · $1.8M
ROUNDS
1
INVESTORS
1
FOUNDED
N/A
HQ
Tulsa, OK
SECTOR
Cleantech
EMPLOYEES
N/A
30D VIEWERS
5

AI overview

Updated

ClearSign Technologies Corporation is a Tulsa, Oklahoma-based public company (Nasdaq: CLIR) that develops industrial combustion and flame-sensing technologies. Its patented ceramic-based ClearSign Core technology is embedded in process burners, boiler burners, and flares to cut NOx emissions to ultra-low levels, as low as under 2.5 ppm in boiler applications, while improving energy efficiency. The company commercializes through partnerships with established burner and heater OEMs, and its ClearSign Eye product provides non-contact electrical flame sensing for industrial fuel-safety systems. Customers span refining, petrochemical, chemical, oil and gas production, and commercial/industrial boiler markets.

What sets it apart

Patented ceramic-core combustion architecture achieves ultra-low NOx (sub-5 ppm) without the efficiency penalties of conventional low-emission burners, delivered through OEM partnerships with established heater manufacturers rather than direct sales.

Funding history

1 round
EquityJul 22, 2026
Form D
+$1.8M$1.8M total

Latest SEC filings

via EDGAR · CIK 0001434524
Form D · Jul 22, 2026NewView on EDGAR

Products

1 tracked

ClearSign Core

Industrial combustion hardware

A patented ceramic-based combustion technology embedded in OEM equipment as process burners, boiler burners, flares, and midstream/power burners, including the M1 series burner ordered by heater manufacturer Tulsa Heaters Midstream.

  • Ultra-low NOx emissions, below 2.5 ppm in boiler applications
  • Ceramic-core burner architecture
  • Available as process burners, boiler burners, and flares
  • Commercialized through OEM partnerships such as Zeeco and Tulsa Heaters Midstream

Links

WebsiteLinkedInSEC EDGAR filings