What ETL Prüftechnik does

ETL Prüftechnik GmbH is a privately held German manufacturer of high-voltage electrical safety testing equipment, founded in 1946 and headquartered in Korntal-Münchingen in the Stuttgart region. The company designs and produces modular automated test systems, single-function high-voltage testers, mobile hipot systems up to 100 kV AC, and a range of operator-protection testing cages (SICAB through XCAB) used in series and laboratory production testing of electrotechnical products. Its flagship ATS400 platform supports up to 30 configurable test modules drawn from 100+ standard variants and covers HV-AC, HV-DC, insulation resistance, protective earth, leakage current, temperature, and functional testing, with ASCII, .NET, and DLL drivers for integration into automated production lines and MES environments. The integrated safety circuit (SHK) has been externally certified by TÜV Nord since 2019 to SIL3, PLe, Category 4, and Type IIIc under EN ISO 13849-1, EN 61508-3, EN 574, and EN 62061, removing the need for customers to build external safety systems compliant with EN 50191.

The company sells through a direct, consultative B2B field-sales motion to enterprise and mid-market customers across nine verticals: E-Mobility, Industrial Equipment & Plant Engineering, Renewable Energies, Lighting, Medical Technology, Household Appliances, Railway Technology, Battery Technology, and Electric Motors. Revenue is generated primarily through one-time sales of capital equipment and modular systems, supplemented by custom engineering and integration services for complete test stations and by recurring after-sales revenue from calibration, repair, rental equipment, and spare parts. Pricing is quote-based and not publicly disclosed, with sales led by technical sales staff and project engineers from the Korntal-Münchingen headquarters.

ETL operates as an independent Mittelstand manufacturer with 11–50 employees, ISO 9001:2015 certification, a 78-year continuous operating history, and a self-stated global footprint. Management is led by Managing Director Mathias Braunmiller; no external investors, parent company, subsidiaries, or public funding rounds are disclosed. Active development is underway on a next-generation Serie600 modular testing platform, supported by a dedicated knowledge hub site and a content-driven marketing stack (technical blog, newsletter, LinkedIn/Facebook/Instagram presence, and Google Ads remarketing).

Name

ETL Prüftechnik

Legal name

ETL Prüftechnik GmbH

Website

https://etl-prueftechnik.de

Company type

Private

Founded year

1946

Operating status

Operating

Headcount range

11–50 employees

Short description

ETL Prüftechnik GmbH is a privately held German manufacturer, founded in 1946, of high-voltage electrical safety testing equipment and modular automated test systems. It serves industrial, automotive, e-mobility, railway, medical, and household appliance manufacturers worldwide via direct B2B sales.

Ownership category

akta.pro rank

Product category

Electrical Safety Testing Equipment

NAICS

Instrument Manufacturing for Measuring and Testing Electricity and Electrical Signals (334515), Testing Laboratories and Services (541380), Electronic and Precision Equipment Repair and Maintenance (811210)

SIC

Instruments For Meas & Testing Of Electricity & Elec Signals (3825), Services-Testing Laboratories (8734)

akta.pro primary industry

Testing, Inspection, Certification & Commissioning (TICx) Technical Services (BPAHAIAL)

akta.pro secondary industry

Commissioning, testing & energization services (HVT, relay testing, SAT) (EUADAKAE)

Keywords

• Electrical safety testing
• High-voltage test equipment
• Modular testing systems
• CE conformity assessment
• Production-line testing

Headquarters

HQ city

Korntal-münchingen

HQ country

Germany

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Electrical Testing Equipment and Systems Sales: ETL Prüftechnik generates revenue through the design, manufacture, and sale of high-voltage testing equipment, modular testing systems, safety testing cages, and related accessories. Products are sold as standard units or custom-configured systems to industrial customers for production-line and laboratory use.
2. Custom Project Engineering and Integration Services: Project engineers provide custom engineering services including automated contacting solutions, inline test integration, and complete new test station installations. Revenue generated through project-based consulting and custom solution development.
3. After-Sales Support and Maintenance: Post-sale support including repair services, rental equipment, calibration, and spare parts supply. Service is available on an ongoing basis after product purchase, providing recurring service revenue opportunities.

Go-to-market motion1 record

Distribution channels3 records

Marketing channels7 records

Core offering

ETL Prüftechnik designs, manufactures, and sells high-voltage electrical safety testing equipment and modular automated test systems used by industrial manufacturers to verify the safety, efficiency, and reliability of electrotechnical products. The portfolio centers on the ATS400 modular testing platform (configurable with up to 30 test modules from over 100 variants) supported by Series 36 single testers, the ZPA36 mobile 100 kV AC hipot system, six sizes of safety testing enclosures, and custom-engineered complete test station solutions for production-line integration.

Product overview

ETL Prüftechnik offers a modular testing equipment portfolio built around the ATS400 automatic testing system as the core platform, supplemented by the Series 36 single testers, Series 600 (upcoming), and the mobile ZPA36 system. The ATS400 operates as a fully electronic combination tester configurable with up to 30 test modules from over 100 standard variants, supporting high voltage AC/DC, insulation, protective earth, leakage current, and functional testing. The product ecosystem includes a comprehensive range of safety testing cages (SICAB through XCAB), test accessories (cables, probes, pistols), and custom engineering services for complete test station construction. The integrated SHK safety circuit provides certified safety levels up to SIL3/PLe/Category 4, meeting EN 50191 requirements for electrical test installations.

Differentiator

Problem solved

Functional benefit

Products and services

• ATS400 Automatic Testing System Fully electronic combination testing system for comprehensive safety and functional tests, modularly configurable with up to 30 different test modules from more than 100 standard variants, supporting HV-AC, HV-DC, insulation resistance, protective earth, leakage current, temperature, and functional testing. Operates as standalone or remote-controlled system for industrial manufacturers in series production.
• ZPA36 Mobile High-Voltage Test System Mobile high-voltage test system up to 100 kV AC for on-site and flexible testing applications, designed for hipot testing of electrical products in non-stationary environments.
• SHK Safety Circuit (Integrated) Integrated dual-channel safety circuit certified to SIL3, PLe, Category 4, and Type IIIc, with two independent processors of different architectures evaluating relay feedback signals to detect first faults and immediately disconnect power supply. Nine pre-certified configurations available for various test station setups.
• Series 36 HV-AC / HV-DC / PE Standalone Testers (UH36, UG36, RS36) Single-function Series 36 testers for HV-AC (UH36), HV-DC (UG36), and protective earth (RS36) electrical safety testing, used as standalone units for production-line and laboratory testing of electrotechnical products.
• UX36 Special High-Voltage Test Equipment (Desktop Units, Test Carts, Two-Part Test Systems) Special configurations of the UX36 platform for high-voltage testing up to 100 kV, available as desktop units, mobile test carts, and two-part test systems with separated control and test sections for flexible bench-top and high-power testing applications.
• Safety Testing Cages (SICAB, DOCAB, MAXCAB, BIGCAB, XCAB, LSP-CAB) Complete range of safety testing enclosures in six size variants (SICAB/S, DOCAB/M, MAXCAB/L, BIGCAB/XL, XCAB/XXL, LSP-CAB) for protecting operators during high-voltage and hipot tests, suitable for test objects of various dimensions.
• Prüfplätze und Prüfanlagen (Custom Test Stations and Systems) Custom engineering, design, and construction of complete test stations and test facilities for inline testing and series testing, including automated contacting solutions integrated into production lines, delivered as project-engineered installations for individual customer requirements.
• ATM400 Relay Matrix Relay matrix module for the Series 400 modular testing system, enabling flexible switching and routing of test signals to expand ATS400 test configurations.
• SICAB Safety Testing Cage (Small Size) Small-sized safety testing cage for protecting operators during high-voltage tests, part of ETL's six-variant safety enclosure product line.
• DOCAB Safety Testing Cage (Medium Size) Medium-sized safety testing cage for operator protection during high-voltage testing, part of ETL's six-variant safety enclosure product line.
• MAXCAB Safety Testing Cage (Large Size) Large-sized safety testing cage for comprehensive operator protection during high-voltage tests, part of ETL's six-variant safety enclosure product line.
• BIGCAB Safety Testing Cage (Extra-Large Size) Extra-large safety testing cage for large test objects during high-voltage testing, part of ETL's six-variant safety enclosure product line.
• XCAB Safety Testing Cage (Double Extra-Large Size) Double extra-large safety testing cage for very large test objects requiring high-voltage testing, part of ETL's six-variant safety enclosure product line.
• LSP-CAB Safety Testing Cage Specialized safety testing cage variant designed for specific testing applications, completing ETL's six-size safety enclosure product line.
• Test Accessories (HV Test Pistols, PE Test Probes, HV/PE Test Cables, Plugs and Sockets, Test Tables, Contacting Units, Test Station Safety Equipment) Comprehensive range of test accessories including high-voltage test pistols for manual testing, PE test probes for continuity and resistance testing, high-voltage and protective earth test cables, plugs and sockets, ergonomic test tables, contacting units for test objects, and station safety equipment including emergency stops, interlocks, and warning systems.

Quantifiable outcome

• 27+ years of product operational life reported by an existing customer (I S I - Industrieprodukte GmbH testimonial)
• +2 more outcomes

Named customers5 records

Segments9 records

Ideal customer profiles2 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Integration4 records

Feature6 records

Scale indicators5 records

Recent moves6 records

Expansion highlights5 records

Broad incumbents

• Fluke Corporation: US-based broad-line test and measurement leader (Fortive-owned) covering portable electrical testers, insulation testers, and installation testers. Overlaps with ETL at the portable/bench tester level but does not directly compete in ETL's modular automated test-station niche.
• Megger Group: UK-headquartered, broad-line manufacturer of electrical test and measurement equipment for power utilities, industrial, and rail markets. Overlaps with ETL in HV testing equipment but operates at much greater scale across a wider portfolio.
• Bender Group: German specialist in electrical safety with a focus on insulation monitoring, residual current, and test systems. Comparable as a German-headquartered peer serving industrial and medical safety compliance, though Bender's core strength is monitoring rather than HV hipot testing.

Direct peers

• Hioki E.E. Corporation: Japanese manufacturer of electrical measuring instruments including insulation testers, hipot testers, and leakage current meters. Directly comparable product portfolio for the same end-customer use cases (production-line safety testing, lab characterization).
• Seaward Group (Rigel Medical): UK-based specialist in electrical safety testers, including portable and production-line hipot/leakage/PE testers. Directly comparable offering for medical (IEC 60601) and industrial production-line safety testing.
• Associated Research / Ikonix: US manufacturer of hipot, ground bond, insulation resistance, and leakage current testers under the Associated Research brand. Closely competes with ETL's Series 36 standard testers and ATS400 modules in CE-compliance-driven production environments.
• Chroma ATE Inc. Taiwan-based manufacturer of electrical safety testers, hipot testers, and automated test systems. Directly competes with the ATS400 platform in production-line safety testing for EV batteries, industrial equipment, and consumer electronics.
• GW Instek (Good Will Instrument): Taiwan-based manufacturer of test and measurement instruments including hipot testers, insulation resistance meters, and safety analyzers. Comparable in target market (production-line safety compliance) with a broader T&M catalog.
• Kikusui Electronics Corporation: Japanese manufacturer of electrical safety testers (hipot testers), AC/DC power sources, and electronic test equipment. Directly competes with ETL in high-voltage safety testing for production lines and laboratories, with overlapping target verticals (automotive components, lighting, household appliances).
• Vitrek Corporation: US manufacturer of high-voltage test equipment, electrical safety analyzers, and hipot testers. Directly competes in CE/IEC-compliant production safety testing with configurable modular offerings similar in concept to the ATS400.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/etl-prueftechnik-gmbh

Compliance3 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles2 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 ETL Prüftechnik