Protonex LLC
501 American Way, Windsor, CA 95492
Operating signal within 12 months from two or more independent sources.
What they make
Search, Detection, Navigation, Guidance, Aeronautical, and Nautical System and Instrument Manufacturing334511- positioning
- algorithms
- Edge AI
- magnetic sensors
- digital magnetic compasses
- position
NAMED ON THE COMPANY’S OWN WEBSITE, READ JUL 29, 2026
Products
Recorded against the company rather than this address. Federal award and drug records name the company, not the plant, so we cannot say which of its sites makes these.
Where these came from
Where it is
Other plants nearby
| Facility | City | Industry | Status | Distance |
|---|---|---|---|---|
| Cpi International | Santa Rosa | Other Basic Inorganic Chemical Manufacturing 325188 | ACTIVE | 1.4 KM |
| Weigh-tronix INC | Santa Rosa | All Other General Purpose Machinery Manufacturing 333997 | UNVERIFIED | 2.4 KM |
| Air Monitor Corporation | Santa Rosa | Automatic Environmental Control Manufacturing for Residential, Commercial, and Appliance Use 334512 | LIKELY ACTIVE | 7.5 KM |
| Agilent Technologies, INC. | Santa Rosa | Radio and Television Broadcasting and Wireless Communications Equipment Manufacturing 334220 | LIKELY ACTIVE | 8.9 KM |
| Max Machinery, INC | Healdsburg | Pump and Compressor Manufacturing 333913 | ACTIVE | 10.1 KM |
Also at this address
No other federal record shares this street address.
Where this record comes from
3 sources hold this plant, and 9 fields on this page come from them. Each line is one agency’s own record of it: the identifier it is filed under, whether that record shows the plant operating or only that it exists, and when the register first and last saw it there.
EPA cross-references this facility in RCRAINFO · EPA site type STATIONARY.
- The company’s own websiteOPERATINGfirst seen JUL 2026 · last seen OCT 2026
- SAM.gov entity registrationOPERATINGRecord K82GMYAGGU66 · first seen JAN 2026 · last seen JAN 2026
- EPA Facility Registry ServiceEXISTENCERecord 110072031742 · first seen SEP 2025 · last seen SEP 2025
IN SONOMA COUNTY21 other plants share this one’s industry (Navigational, Measuring, Electromedical, and Control Instruments Manufacturing, NAICS 3345); 3 of them have a size band on record.
What each source says
Every field below, as each source filed it. The value this page shows is marked; where the sources disagree, the field says so. Status is computed from independent sources; nothing here is self-reported unless marked Claimed.
- Name
- EPA: PROTONEX LLC · JUL 2026 · ON THIS PAGE
- SAM.gov: PROTONEX LLC · JAN 2026 · ON THIS PAGE
- Street address
- EPA: 501 AMERICAN WAY · JUL 2026 · ON THIS PAGE
- SAM.gov: 501 AMERICAN WAY · JAN 2026 · ON THIS PAGE
- City
- EPA: WINDSOR · JUL 2026 · ON THIS PAGE
- SAM.gov: WINDSOR · JAN 2026 · ON THIS PAGE
- State
- EPA: CA · JUL 2026 · ON THIS PAGE
- SAM.gov: CA · JAN 2026 · ON THIS PAGE
- County (FIPS code)
- EPA: 06097 · SEP 2026
- CoordinatesSOURCES DISAGREE
- Census geocoder: 38.530114318836,-122.795983380218 · JUL 2026 · ON THIS PAGE
- EPA: 38.530077,-122.796742 · JUL 2026
- Website
- SAM.gov: www.pnicorp.com · JAN 2026
- CAGE code
- SAM.gov: 81R85 · JAN 2026
- SAM registration expires
- SAM.gov: 2027-01-12 · JAN 2026