Wiesemann & Theis GmbH

Networking, sensors and interface technology for industry, office and IT

  Due to maintenance work, there may be some problems on our website from 24.03. to 26.03.2025.
  For urgent inquiries you can reach us at: +49202/2680-0

About us

This is W&T


  • Nice to meet you!

    Management is a matter of the heart

    I am Tobias Theis and I am proud to have been managing such a friendly company as W&T since January 2024. Glad that you are here too - feel free to browse a little further...
    Are you interested in a product partnership or other co-operation? I am looking forward to your ideas!

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  • Made in Wuppertal

    Development & production from the heart

    We develop and produce our products ourselves. This means we know our range down to the smallest detail, can get to the bottom of any problems and constantly improve. Yes, every single product is our baby, and yes, we accompany the development each time anew, not only with decades of experience and the latest technical expertise, but also with a lot of love and a sense of proportion.

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  • You’ve got a friend

    Reliable Sales & Support

    We want to be one thing above all for our customers: reliable. Our large finished and unfinished stock ensures that short delivery times are the rule, even during the occasional semiconductor crises. We also pay attention to the extremely long-term availability of our products. In our more than 40-year history, we have never had to discontinue a product. We document product features as clearly and comprehensively as possible on our website and in numerous prints; we answer queries quickly and personally.

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  • Count (on) us

    W&T by the number

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    35
    Representatives worldwide

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    99.9%
    Reliability

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    46.431
    Satisfied customers

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    2.154.388
    IO and data points

  • Hey, ho, let’s grow

    Society and Climate

  • For over 20 years we have been supporting the Winzig Foundation in its involvement with the area of early childhood, as well as other regional projects and the Wuppertal/Beyenburg Canoe Club.

    For young people interested in technology, we offer the Bastelclub; a weekly hands-on club where young people can assemble and write programs weekly under professional supervision and with lots of freely available material/

    Not only have we been recognized as a family-friendly company, we are also pleased to have a particularly high level of employee satisfaction: More than half of our employees have been with us for over 10 years.

    With photovoltaic systems and concrete core activation for heating, among other things, we conserve resources while our products are also designed to be particularly energy-efficient (see Press Release "Blue on the outside, green on the inside").

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  • The Rest is History

    Brief W&T History

    A lot has happened since 1979: From tinkerer’s workshop to market leader in just a few years, W&T has stood for practical, durable and sustainable product ideas right from the start. The start-up flair was not provided by a games console, but by a good old table tennis table; instead of all-shiny-and-new marketing, W&T offers reliable solutions and contacts.

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