Himmelwerk

What Himmelwerk does

Himmelwerk Hoch- und Mittelfrequenzanlagen GmbH is a German manufacturer of industrial frequency converters for inductive heating, headquartered in Tübingen and operating since 1950. The company designs and builds high-frequency generators (HU series up to 5 kW, HU S from 25 kW, SINUS up to 25 kW), medium-frequency generators (MU up to 250 kW, MU R from 10 kW), custom hand-manufactured inductors matched to each customer's workpiece geometry, spectral pyrometers for temperature monitoring, cooling-water recooling systems, and complete induction melting installations. Its technology exploits the skin effect across low, medium, and high frequency ranges (50 Hz–27 MHz) to deliver point-accurate heating with claimed energy savings of up to 40% versus conventional furnaces. Himmelwerk has been the exclusive supplier of Radio Frequency Power Supplies to the ITER international nuclear fusion project since 2012 and maintains research collaborations with more than a dozen European universities and institutes, investing 5–10% of annual sales in R&D.

Himmelwerk sells capital equipment exclusively through direct enterprise sales with no resellers or e-commerce channel, supported by named account managers, regional contacts, and a 7-language website with an online quotation wizard. Revenue is generated from hardware sales of generators and inductors, complemented by aftermarket service packages (Himmelwerk Care), the Smart Upgrade retrofit module for self-learning quality assurance on existing equipment, complete melting-plant installations, and customer financing (Himmelwerk Finance). End customers are industrial manufacturers across automotive, e-mobility, medical technology, aerospace, and mechanical engineering, with solutions deployed in 80+ countries and 19,000 generators shipped cumulatively since 1950. The company is independently owned as a private GmbH led by Managing Directors Dr.-Ing. Andreas Seitzer and Dipl.-Ing. Stefan Kaiser, operates a US subsidiary (HUSA), holds ISO 9001 certification, and was recognized as a 2025 TOP 100 German SME innovator.

Name

Himmelwerk

Legal name

Himmelwerk Hoch- und Mittelfrequenzanlagen GmbH

Website

https://himmelwerk.com

Company type

Private

Founded year

1950

Operating status

Operating

Headcount range

51–100 employees

Short description

Himmelwerk is a German manufacturer of high- and medium-frequency induction heating systems serving industrial manufacturers across automotive, e-mobility, medical, aerospace, and mechanical engineering in 80+ countries, including as exclusive Radio Frequency Power Supply supplier to the ITER fusion project.

Ownership category

akta.pro rank

Product category

Industrial Induction Heating Equipment

NAICS

Electrical Equipment, Appliance, and Component Manufacturing (335), Heating Equipment (except Warm Air Furnaces) Manufacturing (333414)

SIC

Industrial Process Furnaces & Ovens (3567), Electronic & Other Electrical Equipment (No Computer Equip) (3600), Electronic Coils, Transformers & Other Inductors (3677)

akta.pro primary industry

Power Electronics for Industrial Heating (Induction/dielectric heating power supplies) (IMAGADAK)

akta.pro secondary industries

Heat Transfer Equipment (Heat Exchangers, Boilers, Condensers) (IMAHAEAC), Heat Treatment & Thermal Processing Furnaces (Hardening, Annealing, Induction) (IMAHADAI), High-Temperature Process Heat Electrification (E-Boilers, E-Furnaces, Induction, Plasma) (EUABAJAA)

Keywords

• Industrial induction heating
• Frequency converters
• High-frequency generators
• Medium-frequency generators
• Induction heating systems

Headquarters

HQ city

Tübingen

HQ country

Germany

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Induction Heating Equipment Sales: Himmelwerk generates revenue primarily through the sale of industrial induction heating equipment including high-frequency generators (HU series up to 5 kW, HU S from 25 kW), medium-frequency generators (MU series up to 250 kW, MU R from 10 kW), SINUS series up to 25 kW, custom inductors, measurement and monitoring systems, cooling water recooling plants, and melting installations. Equipment is sold directly to industrial manufacturers as capital equipment with pricing based on power rating, frequency range, and customization requirements.
2. Service and Maintenance: Himmelwerk offers comprehensive service packages including Himmelwerk Care (service packages), technical support, maintenance, repairs, and optimizations for induction systems worldwide. Service is available for emergencies, maintenance work, and process optimization.
3. Financing Services: Himmelwerk Finance offers financing options for customers acquiring induction heating equipment, facilitating capital purchases.

Go-to-market motion1 record

Distribution channels1 record

Marketing channels6 records

Core offering

Himmelwerk manufactures and sells industrial induction heating equipment, including high-frequency and medium-frequency transistorized generators (HU, HU S, SINUS, MU, MU R series), individually designed custom inductors, spectral pyrometers, retrofit quality-assurance modules, cooling water recooling plants, and complete induction melting plants. The company also develops radio-frequency power supplies for plasma generation in the ITER nuclear fusion project. Products are sold as customized capital equipment directly to industrial manufacturers requiring precise, energy-efficient heating of conductive workpieces.

Product overview

Himmelwerk provides industrial induction heating solutions comprising high-frequency generators (HU series up to 5 kW, HU S from 25 kW, SINUS up to 25 kW) and medium-frequency generators (MU up to 250 kW, MU R from 10 kW). The product portfolio includes inductors and external circuits, measurement and monitoring equipment (spectral pyrometers), the Smart Upgrade add-on for quality assurance, cooling water recooling systems (e-Chilly, Sigma, SMC series), and complete induction melting plants. These systems are designed for applications including soldering, heat treatment, joining, forming, melting, sealing, surface treatment, and indirect heating across industries such as automotive, e-mobility, medical technology, aviation, and mechanical engineering.

Differentiator

Problem solved

Functional benefit

Brands

• Himmelwerk 4.0: Future technology platform focusing on smart automation and digital integration of induction heating systems
• Smart Upgrade
• Himmelwerk Care
• Himmelwerk Finance

Products and services

• HU 1i Megahertzumrichter Megahertz-frequency converter for high-precision industrial induction heating applications. Targeted at industrial manufacturers needing precise, localized heating of conductive workpieces.
• HU 3i Smartumrichter Intelligent high-frequency converter with self-optimizing process monitoring for comprehensive quality assurance and reduction of scrap and energy consumption. Targeted at industrial manufacturers seeking smart factory integration (Himmelwerk 4.0).
• HU 2i High-frequency generator in the HU series for industrial induction heating applications. Targeted at industrial manufacturers requiring precise high-frequency heating.
• Baureihe HU S (ab 25 kW) High-frequency generator series starting at 25 kW power output for higher-power industrial induction heating applications. Targeted at industrial manufacturers with heavier-duty heating requirements.
• Baureihe SINUS (bis 25 kW) Transistorized high-frequency generator series up to 25 kW for precision induction heating. Targeted at industrial manufacturers needing precise high-frequency heating such as melting plants for spectrometric analysis.
• Baureihe MU (bis 250 kW) Medium-frequency induction heating systems up to 250 kW power output for industrial heating applications including hardening, brazing, and forming. Targeted at heavy-industrial manufacturers.
• Baureihe MU R (ab 10 kW) Medium-frequency induction generator series starting at 10 kW power output. Targeted at industrial manufacturers requiring compact, lower-power medium-frequency heating solutions.
• Induktoren & Außenkreise Custom-designed inductors and external circuits matched to individual customer workpiece geometry for efficient inductive energy transfer. Targeted at industrial manufacturers using Himmelwerk generators.
• Spektralpyrometer Spectral pyrometer for precise, contactless temperature measurement during induction heating processes. Targeted at industrial users of induction heating systems requiring tight process control.
• Smart Upgrade Retrofit quality-assurance module for existing Himmelwerk transistor-based frequency converters with self-learning mode, automatic process halt on error, optional data logger and bus system integration. Targeted at existing Himmelwerk customers upgrading production lines (Himmelwerk 4.0 / Smart Automation).
• Kühlwasser-Rückkühlanlagen (e-Chilly, Sigma, SMC) Cooling water recooling systems (e-Chilly, Sigma, SMC series) providing stable closed-circuit cooling water for induction heating installations. Targeted at industrial customers operating Himmelwerk induction systems.
• Schmelzanlagen (Induction Melting Plants) Complete induction melting plants equipped with SINUS series transistorized high-frequency converters (10 kW at 1 or 2 MHz) for melting metal samples for spectrometric analysis. Targeted at laboratories, foundries, and metallurgical analysis operations.
• Radio Frequency Power Supplies for ITER Specialized high-frequency generators supplied exclusively to ITER (International Thermonuclear Experimental Reactor) for plasma generation in the tokamak fusion reactor. Targeted at the ITER international fusion research consortium (35 countries).

Quantifiable outcome

• 30% energy savings (conservative estimate) compared to conventional heating methods; up to 40% possible depending on application
• +2 more outcomes

Segments5 records

Ideal customer profiles2 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

AI capability1 record

Feature7 records

Partnerships

16 partnerships are on record, tiered flagship, core and minor.

• ITER (International Thermonuclear Experimental Reactor)flagshipStrategic or Co-development PartnerSince 2012, Himmelwerk has been the exclusive supplier of Radio Frequency Power Supplies for the ITER project — an international nuclear fusion research initiative involving 35 countries. Specially developed high-frequency generators enable plasma generation in the tokamak fusion reactor. First phases operational at Padua, Italy; future expansion to Cadarache, France. ITER represents the pinnacle of Himmelwerk's technology application.
• Fraunhofer Institute for Surface Engineering and Thin Films (IST)coreStrategic or Co-development PartnerResearch collaboration on induction heating applications in partnership with Fraunhofer IST, contributing to advanced surface engineering and thin film technologies.
• University of NottinghamcoreStrategic or Co-development PartnerAcademic research partnership focused on advancing induction heating technology and applications in collaboration with the University of Nottingham.
• TU Kaiserslautern (Technical University of Kaiserslautern)coreStrategic or Co-development PartnerOngoing research collaboration with TU Kaiserslautern on induction heating technology development and applications.
• TU Chemnitz (Technical University of Chemnitz)coreStrategic or Co-development PartnerResearch partnership with TU Chemnitz for industrial induction heating technology research.
• RWTH Aachen UniversitycoreStrategic or Co-development PartnerCollaborative research with RWTH Aachen University on induction heating applications and process optimization.
• University of PaderborncoreStrategic or Co-development PartnerResearch partnership with University of Paderborn for induction heating technology development.
• Leibniz University HannovercoreStrategic or Co-development PartnerAcademic collaboration with Leibniz University Hannover on induction heating research.
• Max Planck Institute for Iron Research GmbHcoreStrategic or Co-development PartnerResearch collaboration with the Max Planck Institute for Iron Research on materials science aspects of induction heating.
• KIT Karlsruhe Institute of TechnologycoreStrategic or Co-development PartnerPartnership with KIT for advanced research in induction heating technology and plasma applications.
• University of Liège (ULiège)coreStrategic or Co-development PartnerInternational research collaboration with University of Liège on induction heating applications.
• TU Delft (Delft University of Technology)coreStrategic or Co-development PartnerEuropean research partnership with TU Delft focused on induction heating technology.
• UPC BarcelonaTech (Universitat Politècnica de Catalunya)minorStrategic or Co-development PartnerResearch collaboration with UPC BarcelonaTech for induction heating applications.
• South Westphalia University of Applied Sciences (Fachhochschule Südwestfalen)minorStrategic or Co-development PartnerApplied research partnership with South Westphalia University of Applied Sciences.
• University of StuttgartminorStrategic or Co-development PartnerResearch collaboration with University of Stuttgart on induction technology.
• ZIM (Zentrales Innovationsprogramm Mittelstand)coreStrategic or Co-development PartnerActive participation in multiple ZIM (Central Innovation Programme for SMEs) funded research projects alongside German university partners. Focus areas include semiconductor industry, fiber composites, antivirus protection, material recycling, nanoparticles, battery production, and quality control. ZIM projects are industry-oriented research designed to optimize inductive processes for industrial applications.

Scale indicators4 records

Recent moves6 records

Expansion highlights6 records

Direct peers

• EFD Induction: Norway-based global manufacturer of induction heating equipment serving similar industrial applications (hardening, brazing, heating, melting). Closest direct competitor to Himmelwerk with overlapping frequency converter and inductor product lines and similar end markets in automotive and general manufacturing.
• Inductoheat: US-based specialist in induction heating equipment for heat treating, forging, and brazing applications. Direct competitor with comparable transistorized power supplies, custom inductors, and industrial manufacturing customer base.
• Ajax Tocco Magnethermic: US manufacturer of induction heating and melting systems for forging, heat treating, and melting. Direct peer competing with similar product portfolio and serving automotive and heavy industrial customers globally.
• Inductotherm Group: US-headquartered global leader in induction melting and heating technology. Direct competitor in the induction melting space where Himmelwerk also competes with its SINUS-series melting plants; broader scale and global footprint.
• EMA Induction: European (Germany-based) induction heating specialist offering hardening, annealing, brazing, and forging systems. Closely comparable to Himmelwerk in product range, customization approach, and industrial manufacturing customer base.
• eldec Induction: German manufacturer of induction power generators and customized induction heating solutions. Direct competitor in mid-frequency and high-frequency induction equipment serving automotive, aerospace, and general manufacturing with similar custom-engineered approach.

Broad incumbents

• Trumpf: German global leader in industrial machine tools and laser technology. Adjacent rather than direct — serves overlapping automotive and aerospace manufacturing customers with industrial heating/processing capabilities as part of a much broader industrial portfolio.
• Fronius International: Austrian manufacturer of welding, solar energy, and battery charging technology. Comparable as an industrial power-electronics specialist serving manufacturing customers, but with broader portfolio and different primary end applications.
• Siemens AG: Global industrial automation and digitalization conglomerate with industrial heating and power electronics exposure. Competes indirectly through its industrial automation portfolio serving the same end customers in automotive and manufacturing.

Regional players

• EMAG Group: German-based manufacturer of metalworking machine tools including turning, grinding, and induction hardening systems. Regional (German Mittelstand) peer with overlapping induction hardening capabilities and similar industrial customer profile.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat5 records

Key risks5 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/himmelwerk-hoch-und-mittelfrequenzanlagen-gmbh

Compliance1 record

Revenue estimate

Valuation estimate

Number of profiles

Profiles4 records

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 Himmelwerk