What Harco does

HarcoSemco is a privately held US aerospace components manufacturer that designs and produces custom-engineered harsh-environment sensors, thermocouples, cable harness assemblies, and satellite heaters for fixed-wing aircraft, rotorcraft, engines, industrial gas turbines, and spacecraft. The company, formed in 2016 through the merger of Harco (founded 1951) and Semco Instruments, operates from its headquarters in Branford, Connecticut, with manufacturing operations in Nogales, Sonora, Mexico, and serves tier-one aerospace OEMs and MRO operators across commercial aviation, military rotorcraft, power generation, and space segments.

The product portfolio spans four core lines: thermocouples (operating from -65°F to 2,300°F), cable harnesses (static, dynamic, engine, flight control, landing gear), sensor solutions (temperature, speed, proximity, pressure), and satellite heaters built on the proprietary SEMPAK® compacted-ceramic-insulated material technology. Notable differentiators include the patented Frangible Link technology for Overspeed Shutoff Detectors (OSSD) achieving an MTBF of 854,700 hours, in-house fatigue-life test fixtures that replicate dynamic harness wear at a 40:1 test-to-operation ratio, and patented proximity-sensor electronic architectures with fully programmable hysteresis. The company maintains AS9100/ISO9001 (DNV), FAA FAR 145, EASA Part-145, and NADCAP welding and brazing accreditations, with FAA-certified static harnesses demonstrating 99% fleet availability.

HarcoSemco operates a B2B engineer-to-engineer sales motion with quote-based custom pricing, a 48-hour quote response commitment, and multi-year contract billing. Revenue is generated through two primary streams: direct hardware sales of custom aerospace components and FAA/EASA-certified aftermarket repair and overhaul services for engine and airframe harnesses and sensors. The customer base spans Boeing, Airbus, Sikorsky, Bell, GE Aviation, Pratt & Whitney, Honeywell, Rolls-Royce, Embraer, Bombardier, Gulfstream, Dassault, and CFM International, with additional exposure to satellite propulsion programs. Distribution is direct, supported by an active presence at major aerospace exhibitions including Farnborough, Paris Air Show, MRO Americas, MRO Europe, and HAI Heli Expo.

Name

Harco

Legal name

HarcoSemco LLC

Website

https://harcosemco.com

Company type

Private

Founded year

2016

Operating status

Operating

Headcount range

251–500 employees

Short description

HarcoSemco is a privately held US aerospace components manufacturer designing custom harsh-environment sensors, thermocouples, cable harnesses, and satellite heaters for tier-one commercial, military, rotorcraft, power generation, and space OEMs worldwide.

Ownership category

akta.pro rank

Product category

Aerospace Components Manufacturing

NAICS

Other Aircraft Parts and Auxiliary Equipment Manufacturing (336413), Other Guided Missile and Space Vehicle Parts and Auxiliary Equipment Manufacturing (336419), Aerospace Product and Parts Manufacturing (33641)

SIC

Aircraft Parts & Auxiliary Equipment, Nec (3728), Guided Missiles & Space Vehicles & Parts (3760)

akta.pro primary industry

Aerospace Thermal Management, Insulation & Fire Protection Materials (IMABANAE)

akta.pro secondary industry

Space Structures, Mechanisms & Thermal Control (IMABACAF)

Keywords

• Aerospace sensor manufacturing
• Aerospace cable harnesses
• Thermocouple assemblies
• Aviation MRO repair services
• Custom OEM aerospace components

Headquarters

HQ city

Valencia

HQ country

United States

HQ region

North America

Offices2 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Personnel, Operations, Technology or R&D, Supply Chain, Infrastructure, Marketing or Sales

Revenue model

1. Aerospace Components Sales: Direct sales of custom-engineered aerospace components including thermocouples, cable harnesses, sensors, and satellite heaters. Products are tailored to specific customer requirements and OEM specifications. Revenue generated through one-time component purchases for both original manufacturing and aftermarket replacement.
2. Aftermarket & Repair Services: FAA and EASA certified repair station services for overhaul and repair of wiring harnesses and speed/temperature sensors. Supporting wide variety of engines and aircraft platforms including Pratt & Whitney Canada, GE, Snecma, CFM, Lycoming, Honeywell, Hamilton Sundstrand, Rolls Royce, and Sikorsky. Brings over six decades of manufacturing experience to maintenance services.

Pricing tiers

Go-to-market motion1 record

Distribution channels2 records

Marketing channels5 records

Core offering

HarcoSemco designs and manufactures custom-engineered thermocouples, cable harness assemblies, sensor solutions, and satellite heaters for extreme aerospace environments. The company sells directly to commercial aviation, military rotorcraft, engine OEMs, industrial gas turbine operators, and satellite propulsion programs, and provides FAA/EASA-certified aftermarket repair and overhaul services for sensors and harnesses.

Product overview

HarcoSemco is a custom aerospace components manufacturer offering four core product lines: Thermocouples, Cable Harnesses, Sensor Solutions, and Satellite Heaters. The company manufactures over 50 distinct products spanning temperature sensors (RTD, thermocouple, TAT, OAT), speed sensors (magnetic, variable reluctance), proximity sensors, pressure sensors, and various cable harness configurations (static, dynamic, engine, flight control, landing gear). The product portfolio serves fixed-wing aircraft, rotorcraft, and space applications, with repair and overhaul services via FAA and EASA certified repair stations.

Differentiator

Problem solved

Functional benefit

Products and services

• Thermocouples High-reliability thermocouples designed to withstand extreme temperatures (-65°F to 2,300°F) and vibration for aerospace applications, including EGT probes, immersion probes, flexible assemblies, integrated thermocouple-cable assemblies, rigid rake assemblies, T5 high-temperature probes, and oil/fuel temperature probes for commercial aircraft, military aircraft, and industrial gas turbines.
• Cable Harnesses Custom-engineered electrical cable harnesses including static harnesses (position light, landing light, FLIR, weapon, aerial refuel, rescue hoist, HUMS, ICS), dynamic harnesses (blade fold, blade de-ice, tail fold), APU harnesses, fuel tank cables, accelerometer harnesses, flight control harnesses, landing gear harnesses, engine harnesses including FAA STC-approved CFM56-7B engine harnesses, and FADEC engine harnesses for aerospace platforms.
• Sensor Solutions Custom-engineered aerospace sensors and interconnects with removable and replaceable sensing elements including EGT sensors, proximity sensors (Hall effect and inductive), N1/N2 and magnetic speed sensors, brake temperature sensors, environmental sensors (wing anti-icing, air flow, bleed air temperature, cabin temperature, mixed manifold, pack discharge), Outside Air Temperature Sensors, Total Air Temperature Sensors, fuel and oil temperature RTD sensors, and OSSD Overspeed Shutoff Detectors for aircraft engines, power generation turbines, and aerospace platforms.
• Satellite Heaters Ultra-high reliable heaters utilizing proprietary SEMPAK® material technology for satellite ion propulsion systems, including Xenon Ion Propulsion Systems (XIPS), withstanding extreme temperatures in space applications.
• Aftermarket and Repair Services FAA and EASA certified repair station services for overhaul and repair of wiring harnesses, speed sensors, and temperature sensors across a wide variety of engines and aircraft platforms including Pratt & Whitney Canada, GE, Snecma, CFM, Lycoming, Honeywell, Hamilton Sundstrand, Rolls Royce, and Sikorsky.

Quantifiable outcome

• 99% Fleet availability on static and dynamic harness products
• +4 more outcomes

Named customers15 records

Segments5 records

Ideal customer profiles6 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature6 records

Partnerships

One partnership is on record.

• GE AviationcoreTechnology or IntegrationLong-standing OEM supplier and aftermarket repair partner for GE engines and GE LM Series gas turbines. Supports LM1600/2500/5000/6000/LMS100 turbine platforms with custom electrical harnesses (ATEX & UL/CSA listed), EGT harnesses, RTD sensors, and magnetic speed sensors. Relationship encompasses both new production supply and spare parts/repair services.

Scale indicators4 records

Recent moves5 records

Expansion highlights5 records

Direct peers

• Meggitt (Parker Hannifin): Now part of Parker Hannifin, Meggitt supplies aerospace sensors, harnesses, and thermal management components for engines and airframes — directly overlapping HarcoSemco's harsh-environment thermocouple, EGT, and cable harness portfolio across commercial and military platforms.
• Sensata Technologies: Public sensor manufacturer with significant aerospace and defense exposure, including pressure, temperature, and speed sensors. Directly comparable as a supplier of harsh-environment sensors into commercial aviation, defense, and industrial markets.
• Conax Technologies: Specialist in temperature sensors, thermocouples, and probe assemblies for aerospace, power generation, and industrial applications — a focused niche peer to HarcoSemco's thermocouple and EGT sensor business.
• Meggitt Sensing Systems / Sensorex: Specialist sensing arm within the former Meggitt (now Parker), focused on position, speed, and temperature sensors for engines and harsh environments — a like-for-like peer to HarcoSemco's sensor business.

Broad incumbents

• Ametek Aerospace & Defense: Large public conglomerate with an Aerospace & Defense division supplying temperature sensors, probes, and transducers into engine and airframe platforms. Broader portfolio than HarcoSemco but overlapping in EGT/temperature sensing.
• Crane Aerospace & Electronics: Division of Crane Co. supplying aerospace sensing, power, and hydraulic systems. Overlaps with HarcoSemco in sensors and electronic components for fixed-wing and rotorcraft platforms.
• Curtiss-Wright Defense Solutions: Public aerospace and defense supplier with sensor, harness, and electronic subsystem exposure serving commercial aviation, rotorcraft, and naval programs — comparable breadth with overlap in harsh-environment electronics.
• TE Connectivity Aerospace: Global connector, sensor, and harness supplier with a major aerospace business. Directly comparable in custom cable harnesses and engine/flight-control interconnect assemblies, though it operates at substantially larger scale.
• Collins Aerospace (RTX): Major Tier-1 aerospace supplier with extensive sensor, avionics, and engine systems content. Indirectly comparable as both a customer-class partner and as a vertically-integrated competitor on certain platforms.

Emerging players

• Minco Products: Privately-held manufacturer of temperature sensors, RTDs, thermocouples, and heaters for aerospace, medical, and industrial markets. Comparable niche focus on precision temperature sensing and flexible heaters, including space programs.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/harco
• Facebookfacebook.com/HarcoSemco-691397531066756

Compliance6 records

Revenue estimate

Valuation estimate

Number of profiles

Subsidiaries1 record

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Harco