Rheosense, Inc.
Rheosense, Inc. is a small business in San Ramon, CA registered on SAM.gov to bid on federal contracts. It has won about $78,030 in federal prime contracts since fiscal year 2024, according to USAspending.gov's award records for its UEI.
- UEI
- JXGJZJ6E9EK6
- CAGE code
- 4MQ42
- SAM.gov registration
- Active
Federal contract history
| Fiscal year | Obligated, prime contracts |
|---|---|
| FY2024 | $78,030 |
These are every prime contract USAspending.gov records under UEI JXGJZJ6E9EK6, from its award search. For a company that is part of a parent company, USAspending's recipient page can show a different figure for a year, because it counts the company's own record and its parent's record separately.
Its biggest federal customers since fiscal year 2024: National Institutes of Health ($78,030).
Recent contract awards
New contracts, by the date each was first signed. Orders and changes to older contracts count in the yearly totals above but aren't listed here, and Defense awards appear 90 days after signing.
| Awarded | Agency | What it's for | Obligated |
|---|---|---|---|
| Jul 30, 2024 | National Institutes of Health | Rheosense M-VROC-II viscometer system (ambis 2229066) | $78,030 |
Figures are prime contract obligations reported to USAspending.gov. Work done as a subcontractor isn't included.
Registration details
Show registration details
From SAM.gov's monthly public file dated Nov 1, 2026. If the business has updated its registration since, SAM.gov shows the newer details.
| Legal business name | Rheosense, Inc. |
|---|---|
| Unique Entity ID (UEI) | JXGJZJ6E9EK6 |
| CAGE code | 4MQ42 |
| Location | San Ramon, CA |
| SAM.gov registration | Active through May 3, 2027 |
| Business started | 2001 |
| Primary NAICS code | 334516: Analytical Laboratory Instrument Manufacturing |
| Website | www.rheosense.com |
| How to contact | Through its website above. No phone or email in SAM.gov's public file. Search UEI JXGJZJ6E9EK6 in SBA's Small Business Search for a contact the business added. |
Certifications and business types
No SBA certification (8(a), HUBZone or WOSB) in SAM.gov's public file (Nov 1, 2026).
- Asian-Pacific American-owned (self-reported in SAM.gov)
- Minority-owned (self-reported in SAM.gov)
SBA certifications let a business compete for set-aside contracts (set-asides explained). Check the current record on its SAM.gov entry.
How to check or correct this record
The file sometimes leaves a certification out, and a newer one won't be in it yet. Self-reported business types are what the firm says about itself on SAM.gov; they aren't SBA certifications.
Check or correct this record at the source: open its SAM.gov entry, or search UEI JXGJZJ6E9EK6 () in SAM.gov's entity search (free sign-in) and in SBA's Small Business Search (formerly DSBS), which shows SBA certifications. The business can update its details in its SAM.gov registration and its certifications at certifications.sba.gov.
NAICS codes Rheosense, Inc. is small under
On its SAM.gov registration, Rheosense, Inc. meets the SBA size standard for these industries, so it can bid on small business set-asides that use them.
Open contracts in Rheosense, Inc.'s NAICS codes
61 open federal opportunities on SAM.gov use one of Rheosense, Inc.'s NAICS codes and may be open to it: no set-aside, or, in the codes it is registered small under, a small business set-aside. Here are a few, those in its primary code first (none of these are in California right now), then the soonest due.
- Capital Equipment: Purchase of (1) Millipore Sigma
Due in 3 daysNov 9, 2026, 12:00 PM EST
- MQ-4C Hydraulic Fluid Particle Counter
Due in 3 daysNov 9, 2026, 4:00 PM EST
- NCSS - Bioruptor Pico Sonication Device
Due in 4 daysNov 10, 2026, 9:00 AM EST
- FY27 Microbial Incubation ID and Susceptibility CPT
Due in 4 daysNov 10, 2026, 5:00 PM EST
- CSS - Upgrading PExA 2.1 to Vial-Based (PExA Cap)
Due in 6 daysNov 12, 2026, 9:00 AM EST
Similar small businesses
Other small businesses of a similar size with the same primary NAICS code (334516) that have won federal contracts in California:
- Quantum Focus Instruments Corporation, Vista, CA
- Sutter Instrument LLC, Novato, CA
- Gamma Scientific Inc, San Diego, CA
- Ted Pella, Inc., Redding, CA
- Automate Scientific, Inc, Berkeley, CA
- Medical Electronic Systems, LLC, Encino, CA
Is this your business? Get a reminder before the SAM.gov registration expires
Get a reminder before the SAM.gov registration expires. It's active through May 3, 2027. We'll email you 60, 30 and 7 days ahead, and if it lapses.
Frequently asked questions
What is Rheosense, Inc.'s CAGE code?
Rheosense, Inc.'s CAGE code is 4MQ42. The Defense Logistics Agency assigns CAGE codes when a business registers on SAM.gov.
What is Rheosense, Inc.'s UEI?
Rheosense, Inc.'s Unique Entity ID (UEI) is JXGJZJ6E9EK6. SAM.gov assigns the UEI, and it identifies the business across the federal government.
Is Rheosense, Inc.'s SAM.gov registration active?
Yes, as of SAM.gov's public data from Nov 1, 2026, Rheosense, Inc.'s registration is active through May 3, 2027. Registrations are renewed every year.
Is Rheosense, Inc. a small business?
Rheosense, Inc. is registered on SAM.gov as small under 2 NAICS codes, including its primary code, 334516. Size is set per NAICS code, so a business can be small for some contracts and not others.
Keep going
- Look up another business's CAGE code or UEI
- Check a SAM.gov registration's status
- How to become a government subcontractor
- Hiring subcontractors? List small businesses by state, NAICS code and certification
Registration details come from SAM.gov's public entity extract and contract figures from USAspending.gov. Contact names and street addresses are left out. To change these details, update the registration on SAM.gov. To report a mistake on this page, or to ask us to remove it, email hello@fedready.us with the page address; we reply within 2 business days. For a removal, write from an address at the company.