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International Organization of Legal Metrology (OIML)

General information

PTB promotes the international cooperation in legal metrology. A key objective is the harmonization of metrology. In the field of legal metrology this is achieved by co-operation in the OIML (International Organization of Legal Metrology).

Germany is a founding member of the OIML, which was created by an intergovernmental Treaty signed in 1955. Membership of the OIML now stands at 127 Member States.

The primary goal of the OIML is to internationally harmonize the numerous regulations of the various countries and metrological tests of measurement devices, and to promote mutual recognition of test results and certificates, thus reducing technical barriers to trade in the sense of the WTO (World Trade Organization) agreement.

Uniform recommendations on requirements for measuring instruments as well as the mutual recognition of equivalent certificates support the German import and export industry. This concerns equipment that is subject to legal control such as scales and gas pumps as well as gas, water and electricity meters.

The OIML certification system aims at harmonizing type approval procedures of measuring instruments by recognizing type approvals on the basis of OIML recommendations.

An OIML certificate attests that an instument pattern has passed the necessary conformity tests specified in the relevant OIML Recommendation.

A large number of OIML recommendations are normative documents in Europe as defined in the MID (Measuring Instruments Directive) and NAWID (Non-Automatic Weighing Instruments Directive), which in turn form the basis of over 100 million calibrated measuring instruments in Germany.

PTB´s collaboration in OIML Technical Committees

 At the working level there are 18 Technical Committees for drawing up more than 100 internationally harmonized metrological recommendations and regulations for mutual recognition of OIML certificates and OIML test reports. They must be updated continuously and must be adapted to new technologies.

PTB is in charge of the following Technical Committees (TCs) and Subcommittees (SCs):

TC 3/SC  4
Application of statistical methods

Contact:
Dr. Dirk Ratschko
E-Mail: dirk.ratschko(at)ptb.de
Tel.: +49 (0) 531-592-9200

TC 5/SC 2
Software

Contact:
Dr. Marko Esche
E-Mail: marko.esche(at)ptb.de
Tel.: +49 (0) 30-3481-7975

TC 8/SC 3
Dynamic volume and mass measurement (liquids other than water)
(Co-Secretariat with USA)

Contact:
Dr. Michael Rinker
E-Mail: michael.rinker(at)ptb.de
Tel.: +49 (0) 531-592-1380

TC 9/SC 1
Non-automatic weighing instruments
(Co-Secretariat with France)

Contact:
Mrs. Dorothea Knopf
E-Mail: dorothea.knopf(at)ptb.de
Tel.: +49 (0) 531-592-1100

TC 9/SC 3
Weights

Contact:
Dr. Michael Borys
E-Mail: michael.borys(at)ptb.de
Tel.: +49 (0) 531-592-1110

TC 17/SC 7
Breath testers

(Co-Sekretariat mit Frankreich)
Contact:
Mrs. Regina Klüß
E-Mail: regina.kluess(at)ptb.de
Tel.: +49 (0) 30-3481-3337

TC 18
Medical measuring instruments

Contact:
Dr. Stephan Mieke
E-Mail: stephan.mieke(at)ptb.de
Tel: ´+49 (0) 30-3481-7287

TC 18/SC 5
Measuring instruments for medical laboratories

Contact:
Dr. Rainer Macdonald
E-Mail: rainer.macdonald(at)ptb.de
Tel: +49 (0) 30-3481-7542

Moreover, PTB takes an active part in all relevant technical bodies and projects.

The OIML certification system (OIML-CS)

The international development with its effects on European and national regulations is characterized by activities of the OIML.

A central issue, which is crucial even outside the framework of legal metrology, is the mutual recognition of test results and certificates. The certificates issued by the Member States within the framework of the OIML certification system attest conformity of a type of measuring instrument with the relevant OIML Recommendation.

For the manufacturers of measuring instruments, that means that a measuring instrument that has already been tested and certified in one country should, in terms of the smoothest possible economic exchange of goods, also be approved in another country – and without having to repeat the testing procedures.

A large number of OIML recommendations are normative documents in Europe as defined in the MID (Measuring Instruments Directive) and NAWID (Non-Automatic Weighing Instruments Directive), which in turn form the basis of over 100 million calibrated measuring instruments in Germany.

The new OIML-CS is intended to be expanded step by step to include as many types of measuring instruments as possible.

The new certification system, with effect from 1 January 2018, is intended to reach a worldwide recogntion of test results for a significantly higher number of measuring instruments and participating countries. The new OIML-CS is intended to be expanded step by step to include as many types of measuring instruments as possible. It is particularly attractive for OIML Member States which do not have testing laboratories of their own or for those which prefer to rely on the test results of recognized testing laboratories of other Member States.

PTB issues OIML certificates within the OIML-CS according to OIML B 18:

R 51, R 60, R 75 und R 76

Current news

For Precise Measurements Worldwide – New President at the Head of OIML

On 11 October 2017 Roman Schwartz, Vice President of PTB, has been elected President of the International Organization of Legal Metrology for one six-year term.

Press release

 

The 53rd CIML Meeting will be held in Hamburg

The CIML will hold its 53rd CIML meeting in Hamburg, Germany, from Tuesday 9 October to Friday 12 October 2018.

Further information