Protonex LLC
501 American Way, Windsor, CA 95492
ACTIVELAST SEEN IN FEDERAL DATA AUG 2026 · 3 SOURCES
Operating signal within 12 months from two or more independent sources.
Their homepage, crawled AUG 2026
What they make
Search, Detection, Navigation, Guidance, Aeronautical, and Nautical System and Instrument Manufacturing334511Where it is
38.53011, -122.79598 · CENSUS TIGER
Other plants nearby
| Facility | City | Industry | Status | Distance |
|---|---|---|---|---|
| Cpi International | Santa Rosa | Other Basic Inorganic Chemical Manufacturing 325188 | ACTIVE | 1.4 KM |
| L3harris Cincinnati Electronics Dba Sonoma Eo | Santa Rosa | Search, Detection, Navigation, Guidance, Aeronautical, and Nautical System and Instrument Manufacturing 334511 | UNVERIFIED | 1.9 KM |
| Sonoma Eo | Santa Rosa | Search, Detection, Navigation, Guidance, Aeronautical, and Nautical System and Instrument Manufacturing 334511 | UNVERIFIED | 1.9 KM |
| Weigh-tronix INC | Santa Rosa | All Other General Purpose Machinery Manufacturing 333997 | UNVERIFIED | 2.4 KM |
| Santa Rosa Ca/advanced Coating Group/photop Technologies INC | Santa Rosa | Commercial and Service Industry Machinery Manufacturing 333314 | UNVERIFIED | 2.4 KM |
Also at this address
No other federal record shares this street address.
WHERE THIS RECORD COMES FROM — 3 FEDERAL SOURCES, 8 FIELDS
Every fact on this page traces to a public federal filing. The table below names which register holds this facility, whether that register proves the plant operates or only that it exists, and when each of them last saw it.
EPA cross-references this facility in RCRAINFO · EPA site type STATIONARY.
| Source | Evidence | First seen | Last seen |
|---|---|---|---|
| COMPANY SITE | OPERATING | JUL 2026 | AUG 2026 |
| SAM GOV | OPERATING | JAN 2026 | JAN 2026 |
| EPA FRS | EXISTENCE | SEP 2025 | SEP 2025 |
FIELD BY FIELD — WHICH SOURCE SUPPLIED WHAT
| FIELD | SOURCE | SIGNAL |
|---|---|---|
| ADDRESS LINE1 | EPA FRS | JUL 2026 |
| ADDRESS LINE1 | SAM GOV | JAN 2026 |
| CAGE CODE | SAM GOV | JAN 2026 |
| CITY | EPA FRS | JUL 2026 |
| CITY | SAM GOV | JAN 2026 |
| GEOM | CENSUS GEOCODER | JUL 2026 |
| GEOM | EPA FRS | JUL 2026 |
| NAME | EPA FRS | JUL 2026 |
| NAME | SAM GOV | JAN 2026 |
| REGISTRATION EXPIRATION | SAM GOV | JAN 2026 |
| STATE | EPA FRS | JUL 2026 |
| STATE | SAM GOV | JAN 2026 |
| WEBSITE | SAM GOV | JAN 2026 |
Status is computed from independent sources; nothing here is self-reported unless marked Claimed.