GMW

What GMW does

GMW (Gilgen, Müller & Weigert GmbH & Co. KG) is a privately held German manufacturer of precision electrical measurement and testing instruments, headquartered in Cadolzburg, Germany. The company organizes its offering into ten or more product categories — including low- and medium-voltage current transformers, measuring transducers (Messumformer), precision shunts, analogue and digital panel meters, safety appliance testers (Gerätetester), testing technology (Prüftechnik), power quality and energy meters, thermal protocol printers, low-voltage switchgear, switchboard components, and voltage dividers. Its proprietary technology differentiators include the CCT all-current sensor series (DC and AC measurement through a single converter using a Delta-Sigma true RMS method with galvanic isolation up to 100 kHz) and high-precision shunts rated from 1 A to 30,000 A at 0.2%–0.5% accuracy, compliant with DIN 43703 and DIN EN 60051.

The company sells primarily to industrial B2B customers in power generation and distribution, medical and laboratory environments, and general industrial automation, supported by a sales-led go-to-market with a direct sales force and dedicated regional representatives in Germany (e.g., VISPA, AIV Albiez, SCHAD) plus an international representative network spanning 65 countries. Revenue mechanics are driven by one-time equipment sales with multi-year custom-specification contracts and contact-based pricing; specific list prices are not publicly disclosed. GMW emphasizes flexibility for Sonderanfertigungen (custom manufacturing) and is part of an unnamed "successful alliance" of measuring-instrument companies that provides shared production capacity.

Recent commercial activity centers on digital and software-enabled extensions of the safety-tester line, including the 2023 launch of the TG omni 1 safety appliance tester with a tablet-PC interface and the July 2024 release of TestMaster-App version O68, alongside a 2024 discontinuation of the legacy Omni Remote software. The company is family/partnership-owned, managed by Prof. Dr. h.c. Wolfgang Gilgen as Geschäftsführer, and operates with no disclosed external investors, no headcount data, and no public revenue figures.

Name

GMW

Legal name

Gilgen, Müller & Weigert (GMW) GmbH & Co. KG

Website

https://g-mw.de

Company type

Private

Operating status

Operating

Short description

GMW (Gilgen, Müller & Weigert) is a privately held German manufacturer of precision electrical measurement instruments — current transformers, transducers, shunts, panel meters, and safety appliance testers — sold to industrial, power-generation, and medical-laboratory customers in 65 countries.

Ownership category

akta.pro rank

Product category

Electrical Measurement Instruments

NAICS

Instrument Manufacturing for Measuring and Testing Electricity and Electrical Signals (334515), Instruments and Related Products Manufacturing for Measuring, Displaying, and Controlling Industrial Process Variables (334513), Navigational, Measuring, Electromedical, and Control Instruments Manufacturing (3345)

SIC

Instruments For Meas & Testing Of Electricity & Elec Signals (3825), Industrial Instruments For Measurement, Display, And Control (3823)

akta.pro primary industry

Test, Measurement & Calibration Equipment Manufacturing Services (ATE, DAQ, metrology electronics) (IMAGAGAH)

akta.pro secondary industry

Industrial-Grade Sensors & Transducer Components (Discrete sensing elements, transducers, MEMS sensors) (IMAGAJAO)

Keywords

• Electrical measurement instruments
• Current transformers
• Measuring transducers
• Power quality analyzers
• Safety appliance testers

Headquarters

HQ city

De Pere

HQ country

United States

HQ region

North America

Offices1 record

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Measurement Instruments and Equipment: Sale of measurement instruments including current transformers, measuring transducers, shunts, panel meters, testing equipment, thermal printers, and switchgear components. Products are sold directly and through representatives, serving industrial customers worldwide.

Pricing tiers

Go-to-market motion1 record

Distribution channels2 records

Marketing channels2 records

Core offering

GMW manufactures and supplies precision electrical measurement instruments and accessories for industrial and transportation applications. Its product portfolio includes current transformers, measuring transducers, shunts, panel meters, power quality analyzers, safety appliance testers, thermal printers, low-voltage switchgears, switchboard components, and voltage dividers. The company emphasizes high accuracy (down to 0.2%), compliance with DIN standards, and flexibility for custom manufacturing (Sonderanfertigungen) to address niche customer requirements.

Product overview

GMW (Gilgen, Müller & Weigert) GmbH & Co. KG is a German manufacturer of precision electrical measurement instruments. The company offers a comprehensive portfolio of measuring and testing equipment organized into ten product categories: Testing Technology (Prüftechnik), Safety Appliance Testers (Gerätetester), Low- and Medium-Voltage Current Transformers, Power Quality Management / Energy Meters, Analogue Panel Meters, Shunts (Nebenwiderstände), Digital Panel Meters, Measuring Transducers (Messumformer), Thermal Printers (Drucker), Low-Voltage Switchgears, Switchboard Components, and Voltage Dividers. The core products include safety testers (TG omni 1, TG Basic 2, TE uni 2, PAT series), current transformers (ASK, ASR, CCT series), measuring transducers for AC/DC conversion, and power quality analyzers. GMW serves industrial customers in 65 countries worldwide with a focus on electrical measurement, power quality monitoring, and safety testing applications.

Differentiator

Problem solved

Functional benefit

Products and services

• Prüftechnik (Testing Technology) Testing equipment for electrical safety and performance testing, including power quality analyzers and machine testers, used by industrial customers for power plants, industrial facilities, and medical laboratories.
• Gerätetester (Safety Appliance Testers) Safety testers for electrical appliances including PAT 10/2E/2, TG Basic 2/2+, TG omni 1, and TE uni 2 for portable appliance testing and safety compliance verification.
• Low- and Medium-Voltage Current Transformers Current transformers for industrial applications including ASK, ASR, ASRD, ASG, KBU, KBR, KSU, NH, SASK, SASR, SUSK, WSK, WSKD, CTB, and CTM series for measuring AC and DC currents, with CCT series supporting all-current sensing up to 100 kHz.
• Energiemanagement / Energiezähler (Power Quality Management / Energy Meters) Power quality analyzers and energy meters including CMP-2000, MRU-10/12/21/30/120/200, MZC-330S/320S, and Sonel KUS-100/200, PVM-1530, PQM-750 for power quality measurement in industrial and energy applications.
• Analogue Panel Meters Analogue panel meters for displaying electrical measurements in industrial control panels and switchboards.
• Nebenwiderstände (Shunts) Precision shunts for extending current measurement ranges of moving-coil instruments, supporting currents from 1A to 30000A with accuracy up to 0.2%, compliant with DIN 43703 and DIN EN 60051.
• Digitale Einbaumessgeräte (Digital Panel Meters) Digital panel meters for process control, automation, and laboratory applications with quality monitoring capabilities.
• Messumformer (Measuring Transducers) Measuring transducers for converting AC/DC currents, voltages, power, frequency, and other electrical variables into standardized DC signals, including MTU, MTI, MA-1.1s, MV-1.1s, MF-1.1, MPlz.1, MW-1.1, MWg-3.1/4.1, MWu-3.1/4.1, MBg-3.1/4.1, MBu-3.1/4.1, NT-G.1, Mt-G.oH, MA-G.1, MV-G.1, CCT series, EMBSIN series, SWMU series, KBR, and NMC.
• Drucker (Thermal Printers) Protocol printers and paper winding devices in various configurations including graphical thermal printers used to log measurements and test results from GMW equipment.
• Niederspannungs-Schaltgeräte (Low-Voltage Switchgears) Low-voltage switchgear components for electrical distribution and control systems.
• Schaltschrank-Komponenten (Switchboard Components) Components for switchboard and control panel assembly.
• Spannungsteiler (Voltage Dividers) Voltage dividers for voltage measurement and signal conditioning applications.

Quantifiable outcome

• Shunt accuracy: 0.5% standard, 0.2% enhanced
• +3 more outcomes

Named customers3 records

Segments2 records

Ideal customer profiles2 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature4 records

Partnerships

One partnership is on record.

• Successful Alliance (Corporate Group)coreStrategic or Co-development PartnerGMW is part of a successful alliance. With a large product spectrum and considerable production capacities, the company network takes a strong position in the measuring instruments market. This alliance provides GMW with significant manufacturing capabilities and market presence.

Scale indicators2 records

Recent moves5 records

Expansion highlights4 records

Broad incumbents

• ABB: Global industrial and electrification leader with overlapping portfolios in current transformers, power quality analyzers, energy meters, and switchgear. Competes with GMW across most product categories but as part of a much broader portfolio.
• Schneider Electric: Energy management and automation incumbent with overlapping power quality meters, current transformers, and panel meters. Competes in the same industrial and energy end-markets as GMW but with a much larger catalog and software stack.
• Siemens: Major incumbent in industrial automation, energy management, and measurement instrumentation (SENTRON, SICAM). Competes head-on in panel meters, transducers, and power quality, with deeper digital/IoT integration.
• Yokogawa Electric: Industrial measurement and control incumbent with strong presence in power quality analyzers, panel meters, and process instrumentation. Competes with GMW in industrial and power customers globally.

Direct peers

• HBK (Hottinger Brüel & Kjær): Specialist in precision measurement (force, torque, pressure, electrical power) including precision shunts, transducers, and test/calibration equipment. Closely comparable in precision industrial measurement.
• Gossen Metrawatt (GMC-I): German manufacturer of measurement and test instruments including portable appliance testers, multimeters, and power quality analyzers. Direct competitor in safety appliance testing (vs. TG omni 1 / PAT series) and precision instrumentation.
• WAGO: German mid-sized specialist in interconnection, automation, and measurement technology. Overlaps with GMW in measurement transducers and panel-mount instrumentation for industrial customers.
• LEM Holding: Pure-play specialist in current and voltage transducers/sensors for industrial, automotive, and energy applications. Most direct comparable to GMW's current transformer and transducer lines, including EV and renewable segments.
• Chauvin Arnoux: French family-owned manufacturer of measurement and test instruments (current clamps, power quality, panel meters). Closely comparable niche specialist competing in similar safety and industrial testing use cases.
• Phoenix Contact: German-headquartered specialist in industrial connection, automation, and measurement transducers. Closely comparable in product scope (transducers, signal conditioning) and European mid-market customer profile.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks7 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/general-elektronik-gmbh

Compliance2 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 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 GMW