Within the scope of the Metrological Services of PTB, you will find in the database 
Measuring Instruments Certificates (MICert) generell information about certificates issued by PTB on measuring instruments and on approved quality systems of measuring instrument manufacturers.
The download of PDF files (certificate documents) is discontinued in MICert since 01.05.2018 for legal reasons.
You can still access the general information about certificates of the Measures and Verification Act from the website www.ptb.de/s/melodi/index.
If you need certificates, you should request them from the owner of the certificate (manufacturer).
As far as it belongs to the information obligations of the PTB KBS, you can receive individual certificates on request. Please use the 
request form for inquiries.