Skip to main content


Physikalisch-Technische Bundesanstalt - PTB (Braunschweig)
Bundesallee 100
38116 Braunschweig

Responsible for the content of the PTB Ex Proficiency Testing website are the following persons of the PTB Ex-Proficiency Testing team.

Main Responsibility:

Dipl.-Ing.(FH) Tim Krause M.Eng.
E-mail:; (
Phone:    (+49)531-592-3540


Dipl.-Ing.(FH) Jia Wu M.Eng.
E-mail:; (
Phone:    (+49)531-592-3547

Lisa Ostermann M.Eng.
E-mail:; (
Phone:    (+49)531-592-3554

Website Administrator:

Z.182 Web services and development

Accessing the information on this website is at your own risk. Neither PTB nor the PTB Ex-Proficiency Testing team takes responsibility for any files uploaded to this website by the participating laboratories or third party contents made available by external links.