W&T (Wiesemann & Theis GmbH) connects serial, Ethernet, USB, PCI and IO


W&T develops its own products. This enables them to expertly address any problems that may occur in terms of the interoperability that they strive for.


W&T not only develop their own products, they also manufacture them themselves so that they are continuously monitored and improved. The results speak for themselves: more than 99.9% quality and reliability in 2015.


W&T document product characteristics as clearly and completely as possible; and answer your questions without delay.
They are also concerned with extreme long-term availability of our products: in their 25-year history, they have never had to phase out a single product.

  • Interfaces for TCP/IP, Ethernet, RS-232, RS-485, USB, 20mA,
  • Glass and plastic fiber optic cabled, http, SNMP, OPC, Modbus TCP, I/O digital, I/O analog, ISA, PCI.
  • Applications for Com-Server, USB Server, Web-IO, Web-Thermograph and Motherbox.

Customers in North America can also purchase W&T products through the webshop of TOP-electronics USA  in the USA.