Legal Metrology Resources
This page provides links to guidance, toolkits and other resources.
Please complete this form for the Calibration Tour.
All OPSS calibration service requests must be submitted through the LAU mailbox.
All OPSS calibration service requests must be submitted through the LAU mailbox.
- Legal Metrology
- Measuring equipment
- Testing
- OPSS
Resources provided by OPSS for submitting a Section 70 return under the Weights and Measures Act 1985 Act. This includes the form, and the guidance on how to complete the form.
- Legal metrology
- Section 70 returns
- Weights and Measures Regulations
Database of type examination and type approval metrology equipment certificates.
- WELMEC
- NAWI
- Certification Bodies
- MID
European Commission guidance on CE marking.
- CE Marking
- European Communities Act 1972
Statement of the government’s policy on conformity assessment and accreditation.
- Conformity Assessment
Resources for local regulators.
- S70 W & M
- Primary Authority advice
- OPSS
- W & M Bulletins
Euramet guidance on calibrating of non-automatic weighing instruments.
- UK Weighing Federation
- NAWI
Office for Product Safety and Standards (OPSS) guidance for inspectors and manufacturers of weights and measures equipment.
- Road Tankers
- Verification
- NAWI
- Cold Water Meters
- Capacity Measures
- Automatic Catchweighing Machines
- Automatic Gravimetric Filling Instruments
- Automatic Rail Weighbridges
- Beltweighers
- Intoxicating Liquor
- Length Measures
- Liquid Fuel
International Organisation of Legal Metrology (OIML) international vocabulary for metrology.
- OIML
- Units of Measurement
National Physical Laboratory (NPL) best practice guide on improving measurement understanding.
- NPL
- Units of Measurement
European Commission updated 'Blue Guide' on the implementation of directives based on the new approach and the global approach.
- The Blue Guide
European Cooperation in Legal Metrology (WELMEC) advice for manufacturers and notified bodies on what the organisation considers as best practice.
- Software
- Testing Indicators
- Peripheral Devices
- WELMEC
- NAWI
- Conformity Assessment
- Automatic Catchweighing Machines
- MID
- Load Cells
International Organisation of Legal Metrology (OIML) guidelines for the application of certain requirements to legal metrology.
- OIML
- Units of Measurement
- Density
- Calibration
- Hardness
International Organisation of Legal Metrology (OIML) advice on harmonising and improving legal metrology work.
- Software
- Pattern Approval
- Vortex Meters
- Certification Bodies
- Density
- Automatic Pipettes
OIML model regulations specifying the metrological characteristics of measuring instruments and methods and equipment for checking their conformity.
- Packaged Goods
- Verification
- Weights
- NAWI
- Cold Water Meters
- Automatic Catchweighing Machines
- Automatic Gravimetric Filling Instruments
- Automatic Rail Weighbridges
- Beltweighers
- Measuring Instruments
- Metal Stamps
- Load Cells
- Graduated Pipettes
- Length Measures
OPSS guidance for conformity assessment bodies (CABs) certifying for the GB and NI market.
- Notified Bodies
- WELMEC
- NAWI
- NANDO
- MID
- Market Surveillance
Information on relevant details and requirements for public weighbridge operators.
- Public Weighbridges
Office for Product Safety and Standards (OPSS) guidance on the local authority notified body protocol.
- Stickers
- Verification
A collection of resources to support the CTSI Qualifications Framework.
- CTSI Training
United Kingdom Accreditation Service (UKAS) document on measurement uncertainty.
- UKAS
- Units of Measurement