Protonex LLC
Windsor, CA Doing business as PNI Sensor
- UEI
- K82GMYAGGU66
- CAGE
- 81R85
- Primary NAICS
- 334511 Search, Detection, Navigation, Guidance, Aeronautical, and Nautical System and Instrument Manufacturing
- SAM.gov registration
- Active through
Company facts
- Self-certified in SAM.gov
- Entity structure
- Partnership or Limited Liability Partnership
- NAICS codes registered in SAM.gov
- SAM.gov registration date
- Physical address
- 501 American Way, Windsor, CA 95492, USA
- Website
- pnisensor.com
- Industry
-
- Industrials
- Capital Goods
- Industrial Conglomerates
- Industrials & Manufacturing
- SIC code
- 39 Miscellaneous Manufacturing Industries
Registration and certifications come from SAM.gov and the SBA; company details from public web sources. Updated .
Recent federal awards
| Award | Agency | Obligated | Awarded |
|---|---|---|---|
| Positioning navigation intelligence (PNI) sensor enhanced pilot locator beacon for global positioning system (GPS)… | Air Force Research Laboratory | $1,249,226 | |
| Extremely low swap-c (size, weight, power and cost) space magnetometer for LEO (low earth orbit) satellite attitude… | Air Force Research Laboratory | $109,971 | |
| Enhanced magnetic navigation for aircraft | Air Force Research Laboratory | $1,248,559 | |
| Topic #. FX245-PCSO1-0054 sbir phase i - pilot and aircrew locator beacon for mission operations in GPS-contested… | Air Force Research Laboratory | $74,781 | |
| Sbir D2P2 low swap-c M3100 hardened vector magnetometer for manned, unmanned and weapons systems | Air Force Research Laboratory | $1,397,870 |
About Protonex LLC
Protonex LLC, operating under the doing business as name PNI Sensor, is a small business manufacturer specializing in advanced positioning, navigation, and sensor technologies for defense and aerospace applications. The company, registered in SAM.gov since February 2018, focuses primarily on magnetometer-based solutions and related navigation systems designed to support critical defense capabilities. As a limited liability company and domestic manufacturer of goods, PNI Sensor has established itself as a key federal contractor serving the Department of Defense through a robust portfolio of research and development contracts awarded predominantly through the Small Business Innovation Research (SBIR) and Small Business Technology Transfer (STTR) programs.
PNI Sensor's federal contracting activity demonstrates a concentrated focus on magnetometer and navigation sensor development across multiple defense applications. The company has secured nine prime federal contracts totaling approximately $6.3 million, with the Air Force Research Laboratory (AFRL) serving as the primary funding agency through seven awards spanning from December 2023 to July 2025. These contracts encompass SBIR Phase I and Phase II awards for projects including enhanced magnetic navigation for aircraft ($1.25 million), hardened vector magnetometers for manned and unmanned systems ($1.4 million), pilot locator beacon systems for GPS-denied and GPS-contested environments ($1.25 million and $74,781), space magnetometers for low Earth orbit satellite applications ($109,971), and electronic warfare-resilient tracking devices ($1.23 million). Additionally, PNI Sensor received a Department of the Army SBIR Phase I contract valued at $249,994 for advanced magnetometer development under the XTECH SEARCH 7 program, and two Naval Sea Systems Command delivery orders totaling $150,000 for magnetometer supplies. All SBIR and STTR awards carried total small business set-aside designations. The company has also performed work as a subcontractor to prime contractors Leidos, Inc. and L3 Technologies, Inc. on optics-related projects. Performance locations have included facilities in Windsor and Santa Rosa, California, with completion dates extending through February 2027, reflecting ongoing investment in the company's sensor technology development capabilities.
Quick answers
What is Protonex LLC's UEI?
Protonex LLC's Unique Entity ID (UEI) in SAM.gov is K82GMYAGGU66.
What is Protonex LLC's CAGE code?
Protonex LLC's CAGE code is 81R85.
What is Protonex LLC's primary NAICS code?
Protonex LLC's primary NAICS code is 334511 (Search, Detection, Navigation, Guidance, Aeronautical, and Nautical System and Instrument Manufacturing).
Where is Protonex LLC located?
Protonex LLC's physical address in SAM.gov is 501 American Way, Windsor, CA 95492, USA.
Is Protonex LLC registered in SAM.gov?
Yes. Protonex LLC's SAM.gov registration is active through January 12, 2027.
What is Protonex LLC's most recent federal award?
Protonex LLC's most recent federal contract award is Positioning navigation intelligence (PNI) sensor enhanced pilot locator beacon for global positioning system (GPS)… (FA864925P0353), from Air Force Research Laboratory, on July 30, 2025.
On GovTribe
See Protonex LLC's full federal record
- Federal contract awards
- IDV awards
- Subcontracting relationships
- Funding analysis by agency, NAICS and set-aside
- Similar vendors