
You can reach us Monday to Thursday from 08:00 am to 5:30 pm and Friday from 08:00 am to 4:30 pm.







Franz Raith
Business Development (AT | CH | IT | SI)
Phone: +43-699-14711500
Email: f.raith@esz-ag.de


Michael Hübert
Business Development (Automotive testing technology)
Phone: +49-160-97202108
Email: m.huebert@esz-ag.de

Michael Wiere
Business Development (Aviation/TCS)
Phone: +49-151-42400848
Email: aviation-tcs@esz-ag.de
Locations

Eichenau – headquarters
Max-Planck-Straße 16
D-82223 Eichenau
Steinfurt – east
Webereistraße 3
D-48565 Steinfurt
Berlin – northwest
Richard-Willstätter-Str. 14
D-12489 Berlin
Mannheim – southeast
Donaustraße 68
D-68199 Mannheim
Nuremberg – south
Nordostpark 12
D-90411 Nürnberg
Vienna – Austria
Lemböckgasse 49
Haus 2, Stiege D
A-1230 Wien
International
Max-Planck-Straße 16
D-82223 Eichenau
Management

Daniel Herrmann, Katharina Schwarzenbrunner, Oliver Fleischmann, Wicke Fleischer, Philip Fleischmann (from left to right)
Philip Fleischmann:
Executive Board and Technical Management
Philip Fleischmann has technical responsibility for the work results of all technical departments in the company as well as overall responsibility for ensuring compliance with the requirements of DIN EN ISO/IEC 17025 at esz AG. He manages the technical staff from the consulting, QM, IT management and calibration laboratories.
Oliver Fleischmann:
Board of Directors and Executive Board Finance
Oliver Fleischmann is responsible for finance and liquidity management. He is the contact person for wages, tax and legal issues and represents all the financial and business interests of the AG.
Wicke Fleischer:
Management Central Services
Wicke Fleischer is responsible for the company’s Central Services division, in particular the management of the People & Culture, Accounting, Logistics, Purchasing and Controlling departments.
Daniel Herrmann:
Sales & Marketing Management
Daniel Herrmann heads the Sales and Marketing divisions at esz AG. This includes internal and external sales, order management and business development as well as the corporate sales and marketing departments.
Katharina Schwarzenbrunner:
Management of Operations
As operational manager, Katharina Schwarzenbrunner ensures that the high standards of esz AG are practiced and implemented throughout all seven esz locations.
Company history
2023
- Wicke Fleischer and Katharina Schwarzenbrunner join the management team
- Expansion of laboratory space and relocation of the thermometry department
- Move into the new building at Max-Planck-Str. 20
- New accreditations: Torque transducers in test benches, exhaust particle measuring devices (AU-PN testers), test gauges for axle couplings and connecting elements of vehicles
- Cooperation with Electro-Rent
- Successful trade fair appearance at Productronica
- Start of certification of the environmental management system in accordance with DIN EN ISO 14001
- Expansion of the Nuremberg site through additional laboratory space
- Conversion to paperless working completed
2022
- Relocation of the Berlin and Budapest sites to new facilities
- esz presents SYSKAP – system solution for the calibration of exhaust gas particle measuring devices
- New business unit Avation starts work at the Berlin site
- esz awards the 500,000 device ID
- We are again kununu Top Company
- Award as Top Employer Medium-Sized Businesses 2023
- We donate 2,000 € to the Eichenau nursing and elderly care association
- esz is now official Anritsu Certified Partner for Germany and Europe
- New accredited calibrations: mechanical measurands scales and weights (mass) / electrical measurands DC voltage ratio and electrical energy
- esz AG calibrates Dracal USB sensors for European customers
- esz receives European patent for the laboratory management software calibration expert
2021
- Also in 2021, esz refrains from short-time work due to the Covid-19 pandemic
- esz AG celebrates its 45th birthday with a mega art event with Phil Splash
- esz organizes a large Oktoberfest for the employees
- esz and Siglent Technologies cooperate in the field of accredited calibrations
- New at esz: Calibration according to AÜK specifications
- esz organizes in-house corona vaccination campaign days for first, second and booster vaccinations
- The relaunch of the new corporate design is complete
- esz promotes the e-bike mobility of the employee
2020
- esz is one of the winners of BAYERNS BEST 50 for the second time since 2011
- esz AG registers the 400.000 device with calibration expert
- Daniel Herrmann is the new Director Sales, Marketing & Emerging Markets
- esz AG is the first calibration laboratory with accreditation for transmission filters
- Accreditation for calibration of climatic chambers for the measurands temperature and humidity
- Awarded as an ÖKOPROFIT company
- esz supports the GEMIMEG II research project
- Despite the Covid-19 pandemic, esz AG has decided against short-time work and continues to focus on full employment
- esz AG is accredited according to the new DIN EN ISO / IEC 17025: 2018
- esz AG becomes a partner in the Umweltpakt Bayern
2019
- Gipfeltreffen – esz AG celebrates the 75 birthday of its founder Siegfried Fleischmann
- 10 year anniversary of laboratory management software calibration expert
- Grant of a patent for calibration expert
- esz AG registers the the three hundred thousandth device with calibration expert
- esz AG honored as ÖKOPROFIT-Betrieb
- Membership in Familienpakt Bayern
- esz AG presents Josephson-Quantenkalibrator in London
2018
- esz exceed 150 people
- esz AG honored with Bayerischer Gründerpreis (Bavarian Founders Award)
- Establishment of an external service team with over 500 technicians to calibrate brake testers
- esz Southwest branch office moves from Karlsruhe to Mannheim and opens a new laboratory
- esz AG to open a laboratory in Berlin
- successful DAkkS-accreditation for emission testers
- esz to host the 4th “Munich Calibration Day”
2017
- esz AG to extend DAkkS accreditation to more than 200 DAkkS-accredited fields
- successful DAkkS-accreditation for brake testers
- esz AG to implement an external service team of more than 500 technicians to calibrate brake testers
- esz AG to install Josephson Quantum Calibrator for quantum exactly calibrations
- esz AG to introduce partner network cen (calibration expert network)
- esz AG to open a branch office in Budapest, Hungary
2016
- 1976 – 2016: esz AG to celebrate 40th anniversary
- esz AG to host the 3rd consecutive “Munich Calibration Day”. The 2nd day event proved to be a huge success
- APTOMET AG, Switzerland to join esz AG’s Calibration Partner Network
- esz AG to relaunch Webpages utilizing responsive design techniques
- esz AG to publish first image video
- esz AG to introduce new design for software applications calibration expert und asset expert
2015
- esz to introduce the world’s first working AC/DC Josephson Voltmeter to exceed common means of industrial calibration
- Inbetriebnahme des weltweit ersten AC/DC-Quantenvoltmeters
- esz’s test & measurement equipment management software asset expert awarded for innovation and outstanding performance
- esz to introduce QR-codes to instantly access calibration reports
- esz to realize real-time data logging at all stationary labs and for all onsite calibration teams
- esz to open a branch office in Berlin in cooperation with KLH as the first member of esz’s “calibration expert Network”
- esz to host the 2nd “Munich Calibration Day“
2014
- esz exceed 130 people
- esz extend DAkkS accreditation featuring decreased measurement uncertainties
- esz implement a new indoor climate monitoring system for improved environmental conditions
- esz introduce calibration software “calibration expert”
- esz announce development of the World’s first industrial Josephson AC Quantum Calibrator
- esz launch new website
- esz host “Munich Calibration Day”
2013
- substantial laboratory extension
- new Logistik Expert pick-up and delivery routes
- further accreditation in the field of RF, on-site and AC/DC
- second, consecutive testing of the Josephson AC Standard Quantum Voltmeter
- substantial technical improvement to on-site calibration capabilities
2012
- esz among founding memembers to the “new” DKD
- successful DAkkS re-accreditation including further fields and decreased measurement uncertainties
- calibration software application “calibration expert“ introduced to all branches and affiliated laboratories
- initial Josephson AC Standard Quantum Voltmeter prototype testing at esz
2010
- esz on-site validation activites in Biberach begin
- espansion of on-site calibartion capabilities
- esz accredited by “new” German accreditation body DAkkS (D-K-15019-01)
- esz continue to develop force, mass flow and acceleration laboratory capabilities
- initial “go-life” testing of esz’s calibration software application “calibration expert”
2009
- esz exceed 85 people
- esz Austria open in Vienna, Austria
- esz introduce laboratories as systematic calibration competence centers
- new Logistik Expert pick-up and delivery routes
- esz hold 3rd symposium for calibration and metrology
2008
- esz exceed 68 people
- change of name to esz AG calibration & metrology effective January 2009
- DKD accreditation for pressure, humdity, RF-power, rotational frequency/ speed, AC resistance and on-site calibration
- esz exceed 100 accredited measurement fields and 400 corresponding measurement quantities
- Use of asset expert worldwide
- esz introduce nationwide on-site calibration
2007
- esz exceed 51 people
- 10 year DKD laboratory anniversary including 44 measurement fields and 207 corresponding measurement quantities
- esz open branch office in Münster and Karlsruhe, Germany
- Nationwide use of the mobile calibration service with a larger spectrum and expansion of laboratory capacity by 52%
2006
- esz exceed 40 people
- 30 year anniversary
- esz increase RF laboratory capabilities to 67 GHz including automated VNA-technology
- Extension of DKD accreditation to include optical radiation power and non-linearity of fibre-optic radiation receivers
2005
- DKD accrediation for temperature, dimensional measurement quantities and lower frequencies
- DKD accreditation exceeding 22 fields
2004
- DKD accreditation for capacity and inductivity
- DKD accreditation fo RF-power, RF-voltage and reflexion factor up to 18 GHz
2003
- DKD accreditation for AC-power, DC-power, power factor and oscilloscope
2002
- esz exceed 35 people
- esz open branch office in Nuremberg, Germany
2001
- esz exceed 30 people
- esz move to newly built headquarters in Eichenau, Germany and increase laboratory space to 2000 qm and 7 fully airconditioned calibration laboratories
2000
- GUM and DKD-3 introduced to esz
- DKD accreditation for AC-current and 1 mOhm resistance
1999
- esz introduce new calibration procedures for temperature, pressure, humidity and volumetric flow
- New measurement system for fiber optics and transmission technology
1998
- Deutsche Telekom places a major order for nationwide calibration and repair
1997
- Initial DKD accrediation. PTB accredited esz according to DIN EN 45001
1995
- esz exceed 15 people
- esz headquartes move to Industriestrasse 1 in Germering, Germany providing over 1000 sqm in laboratory space
- esz obtain a SKD (Siemens Kalibrier Dienst) certification as the first (and later known to be the only) external, third-party Siemens calibration laboratory
- esz goes online
1992
- esz introduce dimensional calibration
1990
- Carrying out calibrations in accordance with the ISO 9000 standard
- Close co-operation with Marconi Messtechnik, Germering, in the field of service and calibration in RF technology
1988
- esz exceed 4 people including 2 service engineers for repair service and adjustment
1987
- esz headquarters move to the first dedicated office building offering 120 sqm in office and laboratory space including 30 sqm of airconditioned calibration laboratory
- esz introduce computerized work stations
1986
- esz exceed 2 people including business operations and sales
- esz introduce first factory calibration for Dornier Medical
- Stadtwerke München place a major order for test and measurement equipment repair service
1985
- esz introduce computerized work station to business administration
- Dornier Luftfahrt GmbH places a major order for calibration
- esz becomes the first company to introduce flat rates for test and measurement equipment calibration
- Conversion from a “Personengesellschaft” to the “Kapitalgesellchaft esz Elektronik-Service GmbH” on 1st March 1985
1981
- esz introduce RF-technology utilizing a scalar network analyzer up to 8 GHz
1980
- esz utilize the first universal, AC, DC, multifunction calibrator, a Fluke 5100 for calibration and repair
1976
- esz founded by Dipl.-Ing. Siegfried Fleischmann
- Dipl.-Ing. Siegfried Fleischmann installs a laboratory for test and measurement equipment repair, maintenance and calibration at his family home
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esz employees are team players, because only together can the best possible results be achieved. Team spirit and cooperation are part of our corporate culture. Find out what sets esz AG apart as an employer and how you can benefit as an employee.
Quality management
Testing and calibration laboratories are faced with the question of compliance with the “state of the art” and accreditation in accordance with ISO/IEC 17025. Accreditation is intended to ensure that the requirements specified for the management of testing and calibration laboratories are applied in the company.
Quality management in laboratories is essential in order to meet legal, regulatory and normative requirements in the long term and to ensure, improve and further develop the quality of tests and calibrations.



DAkkS accreditation
esz AG calibration & metrology is one of the leading and largest calibration laboratories in Europe. This is confirmed by the number of accredited quantities and measuring ranges in accordance with DIN EN ISO/IEC 17025.
The range of services offered by esz AG is enormous. It is now much easier to list business areas and measurement parameters for which there is no accreditation.
The available calibration facilities and laboratories allow the guaranteed traceability of all measured variables to national and international standards.
Facts & Figures
esz AG calibration & metrology is one of the leading and most modern metrology laboratories in Europe and is one of Bavaria’s “Best 50” medium-sized companies. The company focusses on the calibration of industrial measurement technology. Tailor-made software solutions, a large service portfolio and cost transparency have characterised the company for over 45 years. The calibration laboratory is headquartered in Eichenau near Munich and has branches in Germany and Europe.
In 2011 and 2020, esz AG received the “Bavaria’s Best 50” award from the Bavarian Ministry of Economic Affairs. An award that everyone in the company is very proud of. These and other awards demonstrate that esz AG is not only on the right track thanks to its excellent growth figures, but also fulfils all the criteria of a modern and likeable employer.
In 1976, Dipl.-Ing. Siegfried Fleischmann – today’s Chairman of the Supervisory Board of esz AG – founded today’s esz AG as “Elektronik Service Zentrale”. Since then, the company has grown continuously, organically and in a structured manner – especially since 2003 – even in difficult economic times. By positioning itself on the market throughout Europe and striking a balance between growth and targeted expansion, esz changed its name from a GmbH to an AG at the beginning of 2009.
Have a look at our Meilensteine .
Within the scope of accreditation, esz AG is represented in the respective DKD technical committees. In this context, the company also chairs the Technical Committee on Measurement Uncertainty. esz AG is also involved in the VDI/VDE and plays a key role in the work on guidelines for the calibration of electrical measured values and in the development and implementation of a standardised data format for the exchange of measured values and data obtained in the course of calibration. In order to underscore its global recognition, esz AG has also supported the international committee of NCSL International (“The National Conference of Standards”) as a member since 2012. NCSL International is focussed on international metrological activities and cooperation. Both nationally and internationally, esz AG is represented with its experts in standardisation committees of the DKE (German Commission for Electrical, Electronic & Information Technologies in DIN and VDE), CENELEC (Comité Européen de Normalisation Électrotechnique) and IEC (International Electrotechnical Commission) in order to make an active contribution with its expertise in the field of measurement uncertainty, statistical evaluation and conformity assessment, and has even been entrusted with the chairmanship of a working group for the IEC. The confidence of the DAkkS in the competence of esz AG is not only confirmed by the auditors in the course of the accreditation assessments, but also by the appointment of our experts to the DAkkS Expert Council and the Accreditation Advisory Board of Division 5. The latter through our membership of the VUP (Association of Independent Testing Laboratories).
esz AG works closely with scientists from the national metrology authority PTB, the cooperation partner Supracon and the Swiss colleagues from METAS. Together, they have succeeded in achieving a mobile Josephson voltage standard for direct and alternating variables. esz AG is a pioneer in quantum calibration in industrial laboratories. By expanding and further developing its technology and its own products, esz AG can ensure that it can maintain its leading role in the market and continue to grow in the future.
Our mission:
Safety needs trust. We make trust measurable.
For decisions of today and products of the future.
The quality policy and maximum customer orientation are the basis for our corporate principles.
The satisfaction of our customers is the top priority for esz AG. We always keep an eye on our customers’ current and future requirements. We regularly record any defects or complaints that arise, analyse them and derive corrective and preventive measures from them.
Response time
In 90% of cases, we respond to inquiries within 24 hours (request for quotation). We process and deliver customer-related orders within a maximum of five working days.
Accessibility
You can reach esz AG calibration & metrology Monday to Thursday from 8:00 am to 5:30 pm and Friday from 8:00 am to 4:30 pm.
Complaints
We record all complaints from our customers and document them in a positive, serious and structured manner. We then analyse the causes and initiate direct measures to solve the problem. We try to identify potential complaints in advance and avoid them.
Transparency
Our customers benefit from complete, comprehensible information and our customer-oriented communication. At esz AG calibration & metrology, we avoid abbreviations and so-called “technical jargon” as much as possible.
esz AG has been recognised as an ÖKOPROFIT company for its measures to improve operational environmental protection. These companies are known for their strong commitment to corporate environmental protection. In many areas, the measures far exceed the statutory minimum requirements. In order to maintain this ÖKOPROFIT standard, every company seeking an ÖKOPROFIT award must first undergo an audit according to criteria that are standardised throughout Germany.
Since the introduction of our actively practiced environmental management system, we have been able to reduce the consumption of limited raw materials and resources such as electricity, gas and fuel in the company and strengthen the corresponding ecological awareness among employees, partners and customers.
CO2 emissions, waste and environmental pollution have been reduced.
The recording and subsequent derivation of measures for energy and environmentally relevant procedures and processes ensures the continuous improvement of the company’s overall environmental performance.
Regular audits and continuous monitoring are an integral part of our environmental management system to ensure compliance with all relevant environmental regulations.
esz AG has been recognised as an ÖKOPROFIT company.
esz AG is a member of the Bavarian Environmental Pact.