Teseq
Teseq was a Swiss supplier of electromagnetic-compatibility test instruments, systems, and calibration services.
Last updated August 26, 2026
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Overview
Teseq was a Swiss electromagnetic-compatibility (EMC) testing brand that developed and manufactured equipment for evaluating electromagnetic emissions and immunity. Its portfolio addressed both radiated and conducted testing, including instruments and systems used to determine whether electronic products generate unacceptable interference or can withstand electromagnetic disturbances. The company also operated ISO/IEC 17025-accredited calibration laboratories with an EMC specialization. The business originated within Schaffner Switzerland, established in 1962 by Dr. Hans Schaffner. Schaffner's early work placed the company in the emerging field of electromagnetic compatibility, at a time when electronic systems were becoming more widespread and unintentional interference was an increasing engineering and regulatory concern. The company launched its first EMC test instrument in 1971 and introduced an electrostatic-discharge generator in 1981, establishing capabilities in both emissions measurement and immunity testing. From the 1970s through the 1990s, the business expanded internationally into France, the United States, Singapore, Japan, and China. It also broadened its technical and geographic base through acquisitions. Chase EMC Ltd. of Capel, United Kingdom, was acquired in 1998, followed by MEB Messelektronik Berlin GmbH in 1999. These transactions supported the development of a broader EMC test-equipment offering and increased the organization's presence in important European testing markets. In 2006, a management buyout separated the test-systems operation from its former Schaffner identity and established Teseq as an Aktiengesellschaft. The new company continued the legacy of Schaffner Test Systems while presenting itself as an independent specialist in EMC instrumentation and test systems. In 2012, Teseq acquired MILMEGA and IFI, companies associated with radio-frequency and high-power amplifier technologies. The additions complemented Teseq's immunity-testing capabilities, where controlled RF power is commonly required to expose equipment under test to electromagnetic fields. Teseq's business served manufacturers, laboratories, certification organizations, and engineering teams needing to verify compliance with EMC requirements. Its products and services covered test generation, measurement, immunity evaluation, emissions evaluation, and calibration. The company was twice nominated for Best in Test by Test & Measurement World magazine and received A2LA certification, distinctions that reflected recognition of its technical and laboratory capabilities. The available reference material does not establish Teseq's later ownership, current operating status, headquarters, or whether the brand continues independently; those fields therefore remain unconfirmed.
History
Teseq's history is rooted in Schaffner Switzerland, founded in 1962 by Dr. Hans Schaffner. The organization entered the EMC equipment field as electronic products and systems increasingly needed protection from electromagnetic interference and increasingly had to demonstrate compliance with emissions and immunity requirements. In 1971, it introduced its first EMC test instrument, marking an early commercial commitment to dedicated EMC measurement technology. A decade later, in 1981, it released an electrostatic-discharge generator, extending the portfolio from measurement of emissions to the generation of repeatable immunity stresses. The business expanded internationally between 1975 and 1990, establishing operations or market presence in France, the United States, Singapore, Japan, and China. This expansion coincided with the growing international importance of EMC standards, product certification, and specialized compliance laboratories. Acquisitions further developed the business: Chase EMC Ltd. in Capel, United Kingdom, was acquired in 1998, and MEB Messelektronik Berlin GmbH was acquired in 1999. A management buyout in 2006 created Teseq AG as a separate company. The new entity was formerly associated with Schaffner Test Systems and retained the earlier organization's focus on EMC test equipment and systems. Teseq developed instruments for both emissions and immunity testing, covering radiated and conducted phenomena. It also operated EMC-focused calibration laboratories accredited to ISO/IEC 17025 and received A2LA certification. In 2012, Teseq acquired MILMEGA and IFI. These businesses added capabilities in RF and high-power amplification, which are relevant to immunity testing and other applications requiring controlled electromagnetic energy. Teseq was also twice nominated for Best in Test by Test & Measurement World magazine. The available source material does not provide reliable information about subsequent corporate ownership, leadership, financial performance, current headquarters, or the brand's present status.
- 2012
MILMEGA and IFI acquired
[1]Teseq acquired MILMEGA and IFI, adding complementary RF and amplifier-related capabilities.
- 2006
Teseq established after management buyout
[1]A management buyout created Teseq AG as an independent Aktiengesellschaft, formerly known as Schaffner Test Systems.
- 1999
Acquisition of MEB Messelektronik Berlin
[1]MEB Messelektronik Berlin GmbH joined the business, strengthening its EMC test-equipment activities.
- 1998
Acquisition of Chase EMC
[1]Schaffner acquired Chase EMC Ltd. of Capel, United Kingdom.
- 1981
First electrostatic-discharge generator released
[1]The company expanded its immunity-testing portfolio with its first electrostatic-discharge generator.
- 1971
First EMC test instrument launched
[1]The business introduced its first electromagnetic-compatibility test instrument.
- 1962
Schaffner Switzerland established
[1]Dr. Hans Schaffner established Schaffner Switzerland, the organization from which the later Schaffner Test Systems and Teseq businesses developed.
Products and positioning
A specialist supplier of electromagnetic-compatibility test equipment, complete test systems, RF test infrastructure, and accredited calibration services for engineering, compliance, and laboratory applications.
EMC measurement · 1971
EMC emissions test instruments
Instrumentation for detecting and measuring electromagnetic emissions from electronic equipment. The range addressed conducted and radiated emissions, allowing manufacturers and laboratories to investigate interference behavior and support EMC compliance work.
EMC immunity testing
EMC immunity test systems
Systems used to expose equipment under test to controlled electromagnetic disturbances and evaluate whether it continues to operate acceptably. Teseq's immunity activities included both conducted and radiated testing.
Immunity test equipment · 1981
Electrostatic-discharge generators
Generators designed to apply repeatable electrostatic-discharge events during immunity testing. The first such generator from the business was released in 1981, broadening its support for product qualification and EMC evaluation.
RF test infrastructure · 2012
RF and high-power amplifier equipment
RF and amplifier-related equipment associated with the MILMEGA and IFI businesses acquired by Teseq in 2012. These capabilities supported applications requiring controlled radio-frequency power, including aspects of electromagnetic immunity testing.
Calibration services
EMC calibration laboratories
Calibration services delivered through laboratories accredited to ISO/IEC 17025 with an EMC specialization. The laboratories supported the accuracy and traceability requirements of EMC measurement equipment.
Brand decisions
2012
Acquire MILMEGA and IFIM&ABackground
Teseq operated in EMC immunity testing, where RF sources and high-power amplification can be important components of test infrastructure.
Action taken
Teseq acquired MILMEGA and IFI to broaden its RF and amplifier-related capabilities.
Aftermath
The acquisitions complemented Teseq's electromagnetic-immunity and test-system portfolio.
2006
Separate the test-systems business as TeseqStrategyBackground
The EMC test-equipment operation had previously been associated with Schaffner Test Systems.
Action taken
A management buyout established Teseq AG as a separate company and gave the business an independent brand identity.
Aftermath
Teseq continued as a specialist provider of EMC instruments, systems, and calibration services. Later ownership and operating status are not established by the available sources.
Sources1 sources
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