Welcome to the Open Access Repository of the Physikalisch-Technische Bundesanstalt (PTB-OAR)

PTB is the national metrology institute of the Federal Republic of Germany.

This database grants free access to a number of documents and factual datasets that were elaborated at PTB. This includes publications such as the "PTB-Mitteilungen", the metrological expert journal of PTB, and numerous of documents from the field of legal metrology.

Please use the search function or the category selection on the right-hand side to find the publications you are looking for.

When downloading the publications, please take the license conditions for further use into account.

All Resources

Nationaler Ringvergleich Oberflächenbeschaffenheit: Bestimmung von Rauheitskenngrößen an Raunormalen und Tiefeneinstellnormalen : Vergleichsbericht DKD-V 4.2 (2019); Physikalisch-Technische Bundesanstalt (PTB); DOI: 10.7795/550.20191205
Guards and Watchdogs in One-Way Synchronization with Delay-Related Authentication Mechanisms (2019); Langer, Martin; Teichel, Kristof; Heine, Kai; Sibold, Dieter; Bermbach, Rainer; DOI: 10.7795/EMPIR.17IND06.CA.20191126
Setup and Characterisation of Reference Current-to-Voltage Transformers for Wideband Current Transformers Calibration up to 2 kA (2019); Chen, Yeying; Mohns, Enrico; Badura, Henrik; Räther, Peter; Luiso, Mario; DOI: 10.7795/EMPIR.17IND06.CA.20191122
Mid-IR ICL based TDLAS spectrometer dedicated to monitor HCl concentration in combustion emissions (2019); Qu, Zhechao; Werhahn, Olav; Ebert, Volker; DOI: 10.7795/810.20191119A
Towards a TDLAS based optical gas standard for the absolute HCl measurements in flue gases from combustion process (2019); Qu, Zhechao; Werhahn, Olav; Ebert, Volker; DOI: 10.7795/810.20191119B
Towards a TDLAS based optical gas standard for the absolute HCl measurements in flue gases from combustion process (2019); Qu, Zhechao; Werhahn, Olav; Ebert, Volker; DOI: 10.7795/810.20191105
Fractional frequency ratio difference time series data sets (Optical frequency comb comparison) (2019); Benkler, Erik; Sterr, Uwe; Lipphardt, Burghard; Wilk, Rafal; Puppe, Thomas; Rohde, Felix; DOI: 10.7795/720.20191108
Zündtemperaturen in großen Behältern (2019); Brandes, Elisabeth; Hirsch, Werner; DOI: 10.7795/110.20191105A
Zündtemperaturen in anderen Oxidationsmitteln als Luft (2019); Brandes, Elisabeth; Hirsch, Werner; Stolz, Thomas; DOI: 10.7795/110.20191105B
Druckabhängigkeit der unteren Explosionsgrenze von Gasen und Dämpfen im Überdruckbereich (2019); Hirsch, Werner; Zakel, Sabine; DOI: 10.7795/110.20191105C
Industrial Standards in the Intermediate Pressure-to-Vacuum Range (2019); Sabuga, Wladimir; DOI: 10.7795/110.20191105D
Praxisgerechte Ermittlung der Messunsicherheit : Leitfaden DKD-L 13-1 (2019); Physikalisch-Technische Bundesanstalt, Braunschweig; DOI: 10.7795/550.20191105
Metrology for Biological Radiation Effects – Status and Metrological and Research Needs (2019); Baek, Woon Yong; Bug, Marion Ute; Dangendorf, Volker; Giesen, Ulrich; Hilgers, Gerhard; Rabus, Hans; DOI: 10.7795/110.20191025
Counteracting Antibiotic Resistances, Small non-coding RNA induced gene silencing of antibiotic resistance genes in E. coli DH5α (2019); Kathe, Nina; DOI: 10.7795/320.201904
Ein Flügel reicht, Konstruktion, Bau und Erprobung eines Nurflügels auf der Basis der Glockenauftriebsverteilung (2019); Zell, Ivo; DOI: 10.7795/320.201905

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