Semco Instruments, INC.

What they make

• aerospace components
• harnesses
• landing gear
• air flow
• thermocouples
• RTD sensors
• fixed wing
• flight control
• environmental control

NAMED ON THE COMPANY’S OWN WEBSITE, READ SEP 9, 2026

Where it is

Other plants nearby

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Every listed plant in South Central Connecticut County

Also at this address

More than one federal record exists for this street address. The primary record for the site is listed first.

Harcosemco LLC

Branford, CT

● ACTIVE336412

Where this record comes from

2 sources hold this plant, and 8 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.

• The company’s own websiteOPERATING
  first seen SEP 2026 · last seen OCT 2026
• SAM.gov entity registrationOPERATING
  Record Q72ZM37PKKC1 · first seen AUG 2026 · last seen AUG 2026

IN SOUTH CENTRAL CONNECTICUT COUNTY1 other plant shares this one’s industry (Engine, Turbine, and Power Transmission Equipment Manufacturing, NAICS 3336); 1 of them has 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

SAM.gov: SEMCO INSTRUMENTS, INC. · AUG 2026

Street address

SAM.gov: 186 CEDAR ST · AUG 2026

City

SAM.gov: BRANFORD · AUG 2026

State

SAM.gov: CT · AUG 2026

Coordinates

Census geocoder: 41.290637265419,-72.819393414288 · SEP 2026

Website

SAM.gov: http://www.harcosemco.com/ · AUG 2026

CAGE code

SAM.gov: 24735 · AUG 2026

SAM registration expires

SAM.gov: 2027-08-13 · AUG 2026