SEVENTH BRAZILIAN CONGRESS ON METROLOGY (METROLOGIA 2013) Metrology and Quality for a Sustainable Development From November 24th to 27th 2013 was issued the Seventh Brazilian Congress on Metrology (Metrologia 2013), which is a biannual conference organized and sponsored by the Brazilian Society of Metrology (SBM) and the Brazilian National Institute of Metrology, Quality and Technology (Inmetro). This edition was held in the charming and historical city of Ouro Preto, MG, Brazil, and aimed to join people and institutions devoted to the dissemination of the metrology and conformity assessment. The Metrologia 2013 Conference consisted of Keynote Speeches (7) and regular papers (204). Among the regular papers, the 47 most outstanding ones, comprising a high quality content on Metrology and Conformity Assessment, were selected to be published in this issue of the Journal of Physics: Conference Series. The topics of the conference covered all important areas of Metrology, which were agglutinated in the following sessions in the present issue: Physical Metrology (Acoustics, Vibration and Ultrasound; Electricity and Magnetism; Mechanics; Optics); Metrology on Ionizing Radiations; Time and Frequency; Chemistry Metrology; Materials Metrology; Biotechnology; Uncertainty, Statistics and Mathematics; Legal Metrology; Conformity Assessment. It is our great pleasure to present this volume of IOP Journal of Physics: Conference Series (JPCS) to the scientific community to promote further research in Metrology and related areas. We believe that this volume will be both an excellent source of scientific material in the fast evolving fields that were covered by Metrologia 2013. President of the congress Americo Bernardes Federal University of Ouro Preto atb@iceb.ufop.br Editor-in-chief Rodrigo Costa-Felix Brazilian National Institute of Metrology, Quality and Technology rpfelix@inmetro.gov.br Editors Jose Carlos Valente de Oliveira (Editor on Mechanical Metrology) Brazilian National Institute of Metrology, Quality and Technology jcoliveira@inmetro.gov.br Jose Mauro Granjeiro (Editor on Biotechnology) Brazilian National Institute of Metrology, Quality and Technology jmgranjeiro@inmetro.gov.br Ruth Epsztejn (Editor on Conformity Assessment) Brazilian National Institute of Metrology, Quality and Technology repsztejn@inmetro.gov.br Waldemar Ihlenfeld (Editor on Electrical Metrology) Brazilian National Institute of Metrology, Quality and Technology wgihlenfeld-pronametro@inmetro.gov.br Valnei Smarcaro da Cunha (Editor on Chemistry Metrology) Brazilian National Institute of Metrology, Quality and Technology vscunha@inmetro.gov.br Technical and Scientific Committee for Metrologia 2013 Ado Jorio (UFMG) Carlos Achete (UFRJ, Inmetro) Flavio Vasconcelos (UFMG) Giorgio Moscati (USP) Hans Peter Grieneisen (Inmetro) Humberto Brandi (Inmetro) Jose Carlos Valente de Oliveira (Inmetro) Jose Guilherme Pereira Peixoto (IRD) Jose Mauro Granjeiro (Inmetro) Luiz Claudio Moreira Paschoal (Petrobras) Luis Fernado Rust (Inmetro) Luiz Silva Mello (PUC RJ) Marcos Nogueira Eberlin (Unicamp) Oleksii Kuznetsov (Inmetro) Regis Landim (Inmetro) Ricardo Carvalho (ON) Rodrigo Costa-Felix (Inmetro) Romeu Jose Daroda (Inmetro) Ruth Epsztejn (Inmetro) Valnei Smarcaro da Cunha (Inmetro) Valter Aibe (Inmetro) Waldemar Guilherme Kurten Ihlenfeld (PTB) Wanderley de Souza (UFRJ, Inmetro)