Metrological assurance — the foundation of custody transfer accounting
Legal Shield
We reduce legal and financial risk in custody transfer — with evidence that holds.
Disputed volumes, rejected protocols, vessels waiting at anchor, equipment rejected at customs — such cases often start with a gap in methods, records or responsibilities. Legal Shield builds the evidence chain through every stage: method → document → signature → archive.
How Legal Shield works →One engineering line from decision to operation
Our field is where measurement becomes money: transit corridors, inter-company projects and large marine terminals. Pro meter supports the complete custody transfer chain — measurement, calculation, documentation, acceptance — and the engineering evidence required for audits and disputes.
Investment decision→Customer requirements & technical specification→Tender→Pre-design→Supplier coordination→Design→FAT/SAT & commissioning→Trial operation→Maintenance→Calibration & verification→Metrological support→Laboratories
Every stage is covered in the EM Technical Guide. Start with the free EM-20 Glossary.
Engineering services
Metrology review, audit, design support, commissioning and project support.
Discuss your project →All services · Laboratories · About Pro meterEM Technical Guide
Public Professional and NDA Expert editions across the custody transfer project lifecycle.
Open the shop →Module catalog · EM-14 availableHow we can help
Where Pro meter takes responsibility
Each direction is a service we deliver and a topic the EM Technical Guide covers in writing. Start with the one closest to your project.
Metrology Review & Audit
A focused review of your station, documents and protocols: scope, risks, next steps. Full audit and commission support when the project needs it — remote or on site.
Request a review → · Legal Shield
In the Guide: EM-18 · EM-9
Engineering & Design
From customer requirements and tender to design, FAT/SAT and commissioning. Source-data audit, SOW packages for every discipline, controlled changes.
In the Guide: EM-2 · EM-3 · EM-5 · EM-6 · EM-7
Custody Transfer
Fiscal metering on transit corridors and marine terminals. Formulas, corrections, rounding rules and acceptance criteria are fixed from day one and agreed by both parties.
Custody Transfer → · Publications
In the Guide: EM-10 · EM-12 · EM-17
Calibration & Verification
Field work on live systems without shutdowns: methods, protocols, uncertainty budgets and traceability of standards, accepted by inspections and commissions.
Methods & protocols → · EM-14 accuracy methods
In the Guide: EM-13 · EM-21 · EM-11 · EM-14
Technical Service & Metrology Support
The station stays inspection-ready: maintenance programmes, m-factor control, instrument registers and calibration schedules without duplicate downtime.
Technical service → · Metrology outsourcing
In the Guide: EM-16 · EM-22 · EM-15
More directions
- Laboratories · ISO/IEC 17025
- Dealers & suppliers
- Executive mentoring
- Monthly project support
- Publications & applied science
In the Guide: EM-8 · EM-4 · EM-19 · EM-20 Glossary
EM Technical Guide
One guide, assembled your way
The EM Technical Guide is a modular system: 20+ engineering modules covering the full custody transfer lifecycle. Combine them by project stage, role or function — and step into the project at any stage.
Where is your project now?
Who will use it?
IndustryPublic Professional Edition
Instant download after checkout. For engineers, project teams, training and study.
Open the shop →NDA Expert Edition
Full working methods and protocols. Request → NDA → invoice → controlled delivery.
Request NDA edition →Your own set
A selection of modules for your project, team, product line or course — assembled on request.
Discuss your set →Available now
EM-14 · Methods for Improving Accuracy and Measurement Assurance in Custody Transfer Metering Systems
Find your way around Pro meter
Main pages by topic. The full list, including LV, RU, LT and ET versions, is on the All pages page.