Okazaki Manufacturing

What Okazaki Manufacturing does

Okazaki Manufacturing Company is a privately-held, family-owned Japanese industrial manufacturer specializing in temperature sensors, electric heaters, and the mineral insulated (MI) cables that form their common technological foundation. Established in 1954 in Kobe by Mr K Okazaki originally as a thermocouple wire trading firm, the company has evolved over seven decades into a globally integrated manufacturer operating from six Japanese factories (Kobe HQ, Kobe-Iwaoka, Kobe-Nishi, Fukuoka, Kyushu, and the Main Manufacturing Factory), a Taiwan facility (OMC, established 1987) and Addison, Illinois in the USA via the 1980 acquisition of ARi Industries Inc., with a European sales and support office in Cardiff, UK (2004). Its proprietary MI cable technology, in continuous development since 1959, enables temperature measurement and heating across an extreme range of -269°C to +2,200°C and cable diameters from 0.08mm to 26mm, with the AerOpak Nano holding a Guinness World Record as the world's smallest sheathed thermocouple.

The company's product portfolio is organized into three families built on the same MI cable platform: temperature sensors (thermocouple assemblies, platinum resistance thermometers, the patented VortexWell helical-strake thermowell, multipoint assemblies, and hazardous-area certified sensors); electric heaters (Aeroheat, Micropak ultra-small heaters, high-temp plate heaters up to 1,000°C with surface uniformity within 1%, trace heaters, process and combustor heaters); and MI cables (coaxial, triaxial, twisted-pair and SiO2 cable assemblies). Verticals served include aerospace (NASA Mars Curiosity Rover, JAXA Qualified Parts, ESA EPPL, Japanese MoD), oil/gas/petrochemical, power generation, synchrotron/lightsource, semiconductor, automotive, vacuum technology, and hydrogen and fuel cells. The company reinvests approximately 10% of annual sales into R&D and holds a deep certification stack including ISO 9001, ISO 14001, Nadcap, AMS 2750, ATEX/IECEx/NEC/CSA for hazardous areas, JCSS calibration, JAXA and ESA qualifications, and SIL 3 certification to IEC 61508.

Commercially, Okazaki operates a high-touch enterprise field-sales model with bespoke engineering and quote-based pricing on multi-year contracts, supported by global manufacturing, regional sales offices, local representatives, industry trade show presence, and an extensive technical content library. With 600+ employees worldwide and continued investment in capacity, new product development and new verticals such as hydrogen, the company functions as a niche specialty industrial supplier rather than a high-volume commodity producer.

Name

Okazaki Manufacturing

Legal name

Okazaki Manufacturing Company UK Limited

Website

https://okazaki-mfg.co.uk

Company type

Private

Founded year

1954

Operating status

Operating

Headcount range

251–500 employees

Short description

Okazaki Manufacturing is a family-owned Japanese industrial firm that designs and manufactures temperature sensors, electric heaters and mineral insulated cables for aerospace, oil & gas, power generation, semiconductor, and hydrogen applications across manufacturing sites in Japan, Taiwan, and the USA.

Ownership category

akta.pro rank

Product category

Industrial Temperature Sensors & Electric Heaters

NAICS

Automatic Environmental Control Manufacturing for Residential, Commercial, and Appliance Use (334512)

SIC

Instruments For Meas & Testing Of Electricity & Elec Signals (3825)

akta.pro primary industry

Environmental Sensors (Temperature/Humidity/Gas/Air Quality) (HDAHALAD)

akta.pro secondary industries

Electrical Heat Tracing & Insulation (EHT, Thermal/Acoustic Insulation) (EUAEAFAI), Thermal Management Components (Heat sinks, TIMs, fans/blowers, thermal pads) (IMAGAJAL)

Keywords

• Temperature sensors
• Mineral insulated cables
• Thermocouple assemblies
• Industrial electric heaters
• Thermowells

Headquarters

HQ city

Cardiff

HQ country

United Kingdom

HQ region

Europe

Offices8 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Temperature Sensors: Design and manufacture of temperature sensors including thermocouples, resistance thermometers and thermowells for extreme temperature environments from -269°C to +2,200°C
2. Electric Heaters: Range of electric heating systems constructed using company's own manufactured mineral insulated cables including Aeroheat, Micropak, high temp plate heaters, process heaters and combustor heaters
3. Mineral Insulated Cables: Manufacturing and supply of MI cables ranging from 0.08mm to 26mm diameter with temperature range from 1.5K to 2200°C for signal transmission in harsh environments
4. Bespoke/Custom Solutions: Custom design and manufacturing service for bespoke products tailored to specific customer applications

Pricing tiers

Go-to-market motion1 record

Distribution channels1 record

Marketing channels4 records

Core offering

Okazaki Manufacturing Company designs and manufactures temperature sensors (thermocouples, platinum resistance thermometers, thermowells) and electric heater products built around its proprietary mineral insulated (MI) cable technology for extreme-environment industrial applications from -269°C to +2,200°C. Its portfolio serves aerospace, oil & gas/petrochemical, power generation, semiconductor, synchrotron, vacuum, automotive and hydrogen/fuel cell markets, complemented by bespoke design and manufacturing services for customer-specific applications.

Product overview

Okazaki Manufacturing Company is a world leader in temperature measurement and electric heating solutions, operating from manufacturing sites in Japan, Taiwan, and the USA. The company designs and manufactures a unified portfolio of products built around its proprietary mineral insulated (MI) cables, which serve as the foundational component across the entire product range. The portfolio comprises three core product families: (1) Temperature Sensors — including thermocouple assemblies (Fan Type Tube Skin, AerOpad, Multipoint, Gas Turbine, High Pressure), Platinum Resistance Thermometers/RTDs, thermowells (VortexWell with helical strake design, Standard Thermowells), and specialty sensors for hydrogen/fuel cells and aerospace; (2) Electric Heaters — including Aeroheat, Micropak ultra-small heaters, High Temp Plate Heaters, Mineral Insulated Trace Heaters, Process Heaters, Combustor Heaters, and Ion Thruster Heaters; and (3) Mineral Insulated Cables — including Coaxial, Triaxial, Twisted Pair, SiO2 Coaxial, and Signal MI Cable Assemblies. These products cover an operating temperature range from -269 degrees C to +2,200 degrees C and serve industries including Aerospace, Oil/Gas/Petrochemical, Power Generation, Synchrotron, Semiconductor, Automotive, Vacuum, and Hydrogen/Fuel Cells. The company also offers bespoke design and manufacturing services when standard products do not meet specific application requirements.

Differentiator

Problem solved

Functional benefit

Brands

• VortexWell: Thermowell with innovative helical strake design to reduce vortex-induced vibrations and prevent thermowell failures
• AerOpak
• Aeropad
• Resiopak
• AeroPak
• AeroMini
• Aeropak Nano
• Micropak
• AEROHEAT
• Hoskins 2300
• AeroPak SiO2

Products and services

• Fan Type Tube Skin Thermocouple Tube skin thermocouple designed for process fired heaters, featuring a unique 8mm Hastelloy-X sheath and 38mm fan-tip end tip that welds directly to process heater tubes, delivering accuracy within +4 to +6°C of true tube temperature with working life exceeding four years.
• VortexWell Thermowell Thermowell with innovative helical strake design that eliminates over 90% of dynamic stresses caused by vortex shedding, preventing flow-induced vibration failures without requiring a velocity collar; for oil & gas, petrochemical and process plant applications.
• AerOpad Tube Skin Thermocouple Patented tube skin thermocouple designed in 1964, welded directly to process or boiler tubes, enabling retention of complete control over flow or fuel measurement in petrochemical and power generation applications.
• Multipoint Temperature Assemblies Multipoint temperature assemblies for crude oil storage tanks, hydrocarbon cracking units, chemical reactors and desulphurisation catalyst bed reactors, capable of providing full 3D temperature profiles.
• Gas Turbine Thermocouple Assemblies Complex thermocouple multi-bundles for measurement of outlet gas temperature in helicopter rotor turbo shaft engines and gas turbine engines, operating between -50°C and +2,200°C.
• Explosion/Flame Proof Temperature Sensors Temperature sensors certified for use in potentially hazardous and flammable atmospheres, meeting international standards including ATEX, NEC, CSA and IECEx for zones 0, 1 and 2.
• Platinum Resistance Thermometers (RTDs) Platinum resistance thermometer sensors operating from -260°C to +930°C with high accuracy, fast thermal response and immunity to high vibration, mechanical shock and radiation; approved by JAXA as Qualified Parts for Aerospace Development.
• AerOpak Nano Ultra-Fine Thermocouple Ultra-fine sheathed thermocouple with a diameter of 0.08mm (thinner than a human hair), holding the Guinness World Record for the world's smallest sheathed thermocouple.
• Cryogenic Temperature Sensor Highly accurate sensor for measuring cryogenic temperatures as low as 1.5K, supporting liquid hydrogen storage, aerospace research and scientific instrumentation applications.
• Hydrogen Level & Dispenser Sensors Sensors for measuring the level of liquid hydrogen in storage vessels and high-pressure sensors for hydrogen dispensers in fuel cell vehicle refuelling applications, with explosion-proof versions available.
• Aeroheat Mineral Insulated Heater Long-life mineral insulated metal sheathed heater manufactured from a single diameter cable with no external joins, integrated unheated cold section eliminating need for water cooling, suitable for deposition equipment including sputtering, CVD and ALD.
• Micropak Ultra-Small Diameter Heater Ultra-small diameter mineral insulated heater with greater flexibility and small bend radius ratio to outside diameter; operating range -200°C to +500°C with no external join between hot and cold sections; suitable for vacuum applications.
• High Temperature Plate Heaters High temperature plate heaters providing superior performance and uniform surface temperature (within 1%) for semiconductor manufacturers, with operating temperatures up to 1,000°C, available in round and square shapes in aluminium, stainless steel and Inconel alloys.
• Mineral Insulated Trace Heaters MI heating cables providing reliable and rugged heat tracing for demanding applications within the oil and gas process sector, capable of heating equipment to higher temperatures with various sheath and conductor combinations.
• Process Flanged Heaters Process flanged heaters supplied with various process flanged connections and material combinations, ranging from several dozen watts to many thousands of kilowatts, with process welding to ASME IX standards.
• Combustor Heaters Combustors designed and manufactured to comply with international standards including Construction Code for Pressure Vessels, High Pressure Gas Safety Law and Construction Code for Boilers.
• Heaters for Ion Thrusters Heaters designed for ion thrusters used in satellite station-keeping and deep space probe propulsion, using refractory metals to reach the high temperatures required to ignite plasma while providing long-life reliability for deep space applications.
• Coaxial MI Cables Single conductor mineral insulated cables with metal sheath and secondary copper sheath, available with hermetically sealed connectors, operating over temperature range from 1.5K to 2,600°C.
• Triaxial MI Cables Coaxial cables with a supplementary sheath that insulates the cable from ground, available with hermetically sealed terminations.
• SiO2 Coaxial MI Cable Assemblies Coaxial MI cable assemblies with excellent radiation and temperature resistance, assembled with Alumina Ceramics SMA connectors using SiO2 insulation; rated up to 300°C with lightweight 19g/m cable and high frequency properties.
• Signal MI Cable Assemblies MI cable assemblies with excellent radiation and temperature resistance, assembled with Alumina Ceramics connectors for thermocouple, control, instrument, low voltage and high voltage cable applications.
• Bespoke Temperature Sensor & Heater Design Service Custom design and manufacturing service for bespoke temperature sensors, heaters and MI cables tailored to specific customer applications where standard products do not meet technical requirements, supporting aerospace, oil & gas, power generation, semiconductor, hydrogen and vacuum technology sectors.

Quantifiable outcome

• VortexWell eliminates over 90% of dynamic stresses caused by vortex shedding
• +4 more outcomes

Named customers5 records

Segments8 records

Ideal customer profiles4 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature7 records

Partnerships

One partnership is on record.

• JSME (Japan Society of Mechanical Engineers)coreStrategic or Co-development PartnerCollaboration with JSME in early 1990s to develop the VortexWell product following the Monju nuclear power plant failure. JSME published new guidelines after the incident mentioning helical strakes as a solution to prevent Karman Vortex effect.

Scale indicators6 records

Recent moves13 records

Expansion highlights5 records

Broad incumbents

• Advanced Energy Industries: US-listed precision power and sensing company whose Thermal Solutions (formerly LumaSense) and heater platform serve semiconductor and industrial markets — overlaps with Okazaki's semi-conductor plate heaters and process heater business.
• Emerson Electric (Rosemount): US-listed industrial automation conglomerate whose Rosemount division supplies temperature and pressure instrumentation for O&G, chemical, and power — competes with Okazaki in process temperature measurement at scale.
• Endress+Hauser: Swiss family-owned process instrumentation leader offering temperature, pressure, level, flow and analytical sensors globally — broader portfolio than Okazaki but directly competes in industrial temperature measurement for process industries.
• Honeywell International: US-listed industrial conglomerate offering temperature sensors and process instrumentation across aerospace, O&G, and chemicals — broader and lower-priced competitor to Okazaki in many of the same end markets.

Direct peers

• Conax Technologies: US manufacturer of temperature sensors, pressure seals, and MI cable assemblies for aerospace, defense, energy and industrial markets — comparable niche focus on mission-critical temperature measurement.
• Watlow Electric Manufacturing Company: Privately held US manufacturer of electric heaters, thermocouples, RTDs and temperature controllers serving semiconductor, aerospace, and process industries — directly comparable product portfolio and end markets to Okazaki's sensor and heater lines.
• Pyromation: US-based manufacturer of temperature sensors (thermocouples, RTDs) and thermowells for industrial and aerospace applications — direct comparable in product type and customer base, though smaller scale.
• WIKA Instrument: German family-owned global manufacturer of temperature, pressure, level and flow measurement instruments including thermocouples and RTDs for industrial process applications — directly competes in Okazaki's core O&G, power, and petrochemical segments.
• Durex Industries: US-based specialty manufacturer of electric heaters (including MI heaters) and temperature sensors for industrial, semiconductor, and aerospace markets — directly comparable in MI heater and thermocouple product categories.
• Thermo Electric (TE Wire & Cable / Thermo Est): Specialty manufacturer of thermocouples, RTDs, mineral insulated cables, and process heaters — closest direct competitor to Okazaki's MI cable and temperature sensor portfolio.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat6 records

Key risks6 records

Key highlights6 records

Customer concentration

• LinkedInlinkedin.com/company/okazaki-manufacturing-company-uk

Compliance19 records

Revenue estimate

Valuation estimate

Number of profiles

Subsidiaries7 records

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 Okazaki Manufacturing