Every new New York business filing, every dayKnowCO2
Postal Address, Registered Agent
KnowCO2 LLC is an open-source hardware company that designs and sells a portable CO2 monitor based on ESP32-S3 and SCD41 sensors, targeting makers, educators, and indoor air quality enthusiasts. The company is located at 35 Harbor Road, Sound Beach, NY, as indicated by the LLC filing.
Filed December 19, 2025 · Sound Beach, NY · Suffolk County
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New York Department of State, Division of Corporations · Entity 7786934 · Retrieved May 6, 2026
About KnowCO2
KNOWCO2 LLC was incorporated in New York on December 19, 2025, with a principal address in Sound Beach, New York. The owner filed personally as the registered agent. The domain was registered on December 12, 2025, 7 days before filing, through Amazon Registrar. The modern website matches the filing name and address. No annual report or EIN on file yet. We estimate revenue under $100,000 and 1 to 5 employees, operating online only.
- Domain registered 7 days before the company filed.
- Owner filed personally as the registered agent.
- Website identity confirmed, matching the filing name and address.
- We estimate revenue under $100K and 1-5 employees, online only.
- No annual report or EIN on file yet.
Compiled from the state record, the company's public web presence, and our own research; revenue, employee, and footprint figures are estimates, not verified financials. Updated August 23, 2026.
One of 3 new businesses registered in Sound Beach in December 2025, and the only hardware business registered there that month.
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Filing Details
Verified Business Profile
Contact Information
Verified Website Profile
We matched this business to its website and pulled the domain's registration (WHOIS) record. Domain age is one of the strongest signals that a filing is a truly new business and not a re-filing or paperwork change.
Frequently Asked Questions
When was KnowCO2 registered?
KnowCO2 was registered as LLC on December 19, 2025 in New York.
Where is KnowCO2 located?
KnowCO2 is based in Sound Beach, NY, 11789, in Suffolk County.
What type of business is KnowCO2?
KnowCO2 is classified as a hardware business (co2 monitors).
Does KnowCO2 have an EIN on file?
No EIN was found on file for KnowCO2 at the time of registration.
Who Sells to This Business
Based on the business category, these service providers typically target this type of business.
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