Metrological assurance — the foundation of custody transfer
Active languages are links; pale ones are in preparation.
- Company
- About Pro meterPro meter SIA, Ventspils: 45+ years of custody transfer practice
- Our projectsCompleted sites and engineering solutions
- Custody transfer and engineering
- Custody transferWhere measurement turns into money — and how to protect it
- Measurement station tenderJustification, not price: what to specify before choosing a supplier
- Metering system engineeringFrom specification to commissioning
- Secondary instrumentation cabinetsFlow computer cabinets: accuracy, reliability, legal protection
- Quality control skidCompact module: density, water, viscosity, sulphur
- Metrology and Legal Shield
- Calibration and verificationMetering system verification: a 7-stage chain
- Legal ShieldProtocols, archives, evidence for disputes and commissions
- Metrology laboratoriesISO/IEC 17025 accreditation, new measurement types
- Services
- All servicesEngineering work for your task
- Metering system maintenanceMaintenance, diagnostics, preparation for verification
- Metrological outsourcingYour metrology service — on contract
- For dealers and manufacturersCooperation with equipment suppliers
- Technical Guide and shop
- EM module catalog20+ engineering modules A–Z
- EM Technical Guide shopBuy modules: instant PDF download
- EM-14 · Accuracy improvementAvailable now: methods to remove systematic error
- EM-20 glossaryFree: terms in RU · EN · LV
- News and contacts
- NewsWhat is new at Pro meter
- PublicationsArticles and co-authorship
- ContactDescribe your task — we reply within 1–2 working days
Pro meter SIA · 45+ years of custody transfer practice
Knowledge that protects your project
Custody transfer of oil and gas — accurate, loss-free and dispute-proof.
We know what to do at every stage of a project, and we will teach your team to do it. We can join from the very start or take over a project at any stage — including one that looks lost.
After studying our materials, your engineers, managers and commission members work with confidence: they are protected by knowledge, by documents and legally. That means your work, reputation and money stay safe.
They say we are lucky. It's true — our luck is backed by knowledge.
- We know what to doDecisions grounded technically and metrologically
- We know why it is rightRegulatory basis, traceability, accuracy
- We protect the resultDocuments and evidence that hold up in a dispute
What is your role in the project?
Choose your role — we will show what matters to you, which modules and services help and where to start.
On sale Coming soon to the shop On request Free
📁Executives and project managersDecision-makers, technical director, project manager
Risk: decisions made at the start determine metering accuracy and money for decades ahead.
You get: a picture of the whole metering chain, checkpoints for every stage and an independent expert assessment.
- EM-10 · Metrological Assuranceon requestFramework: measurement, verification, laboratory, certificate — as one system
- EM-3 · Engineering A–Zon requestThe full route of the metering system and where costly errors arise
- EM-18 · Commissions and AuditsoonReport for decision-makers: risks, conclusions, next step
Pages: Custody transfer · Our projects
Order a rapid diagnosis →📁Developers, manufacturers, dealersOEMs, equipment suppliers, dealers
Risk: the instrument performs perfectly on the test bench — and loses accuracy in real site conditions.
You get: an understanding of what the buyer really needs, real operating requirements and feedback from the field.
- EM-17 · Specification Alignmenton requestWhat the buyer wants and what is best to offer
- EM-15 · Instrument Reviewon requestAdvantages and limitations when selecting equipment
- EM-14 · Accuracy Enhancementon saleConfiguration, redundancy, alarm logic, DataFeedback
- EM-19 · Outlook and R&Don requestTest rigs, compact provers, co-authorship
Pages: For dealers
Propose cooperation →📁Delivering and receiving partiesRepresentatives of the product supplier and recipient
Risk: each party trusts its own figures, and the dispute is won by whoever has stronger evidence.
You get: traceability of the result from the reference standard to the certificate, and an evidence base for any dispute.
- EM-12 · Verification SchemesoonReference standard → laboratory → prover → mass flowmeter → flow computer → certificate
- EM-13 · Verification Protocolson requestChain of evidence for every measuring channel
- EM-11 · Error and Uncertaintyon requestMPE and GUM: how to protect the result in a dispute
- EM-9 · Data and Reportingon requestFiscal data, substitution, audit trail
Pages: Legal Shield
Analyse a discrepancy →📁DesignersProcess, instrumentation and control, automation, electrical, civil works
Risk: every design section affects the accuracy of the commercial result — even the civil works.
You get: metrological requirements for every section and a design that passes FAT/SAT the first time.
- EM-5 · Pre-design Preparationon requestSpecification, FEED, choice of method and accuracy class
- EM-6 · Metering System Designon requestHow each design section affects accuracy
- EM-17 · Specification Alignmenton requestWhat specification the factory engineer expects
- EM-4 · Documentationon requestEvidence matrix for audits and disputes
- EM-22 · Quality Control Skidon requestQCS, flow density, sampler isokinetics
Pages: Metering system engineering
Order a design review →📁Commissioning and start-up engineersLead engineers: start-up, tuning, procedures, protocols
Risk: an error built in at commissioning stays hidden for years — while money leaks every day.
You get: a step-by-step control sequence and working protocols for every measuring instrument.
- EM-7 · Commissioning and Start-upon requestInstallation, loop check, SAT, first commercial result
- EM-13 · Verification Protocolson requestMass flowmeter, prover, density meter, P, T, flow computer
- EM-21 · Metering System Verificationon requestPreparation, measurements per protocol, report
- EM-14 · Accuracy Enhancementon saleElimination of systematic error components
Pages: Calibration and verification
Support at FAT/SAT →📁Metrologists and laboratoriesMetrologists, accredited laboratories, verification officers
Risk: the certificate exists, yet the traceability chain breaks — and the result loses its legal force.
You get: end-to-end traceability, procedures and the logic of the uncertainty budget.
- EM-10 · Metrological Assuranceon requestMetrology of commercial operations as a system
- EM-12 · Verification SchemesoonTraceability scheme T / P / ρ / V
- EM-17 · Specification Alignmenton requestRegulatory basis of both parties — from the factory design
- EM-11 · Error and Uncertaintyon requestUncertainty budget: a mass flowmeter example
- EM-8 · Laboratorieson requestProcedures, verification of FloBoss S600+ flow computers
Pages: Laboratories · Calibration
Discuss your laboratory →📁Economists and lawyersContract, finance and legal departments
Risk: the contract is legally flawless yet technically vulnerable — and the dispute is lost on metrology.
You get: Legal Shield — contract, documents and evidence that hold up in a dispute. Legal theory here is only the basis. The key is a consultation with a lead engineer who knows every possible risk.
- EM-4 · Documentationon requestDocuments as management and financial protection
- EM-9 · Data and Reportingon requestFiscal data integrity and audit trail
- EM-17 · Specification Alignmenton requestTechnical risks to cover in the contract
- EM-11 · Error and Uncertaintyon requestThe bridge between calculation, certificate and contract
- EM-18 · Commissions and AuditsoonEvidence base for claims and commissions
Pages: Legal Shield
Lead engineer consultation →📁Procurement and tender committeesProcurement department, tender committee
Risk: the cheapest supplier was chosen — and the metrological requirements were left out of the specification.
You get: a list of what must be specified before choosing a supplier: metrology, laboratory, FAT/SAT, contractor qualification.
- Tender guidefreeWhere to start preparing a tender
- EM-2 · Tenderon requestThe tender as the first technical act of the project
- EM-5 · Pre-design Preparationon requestRisk checklist before the tender is announced
- EM-17 · Specification Alignmenton requestWhat exactly you are buying and what the supplier is selling
📁Operations and maintenanceMetering system manager, operators, maintenance team
Risk: the system works — until verification or a claim arrives.
You get: maintenance levels 1/2/3, preparation for verification, quality control and an orderly protocol archive.
- EM-16 · Technical Maintenanceon requestSchedules, diagnostics, readiness for result acceptance
- EM-22 · Quality Control Skidon requestProduct quality and flow density
- EM-9 · Data and Reportingon requestArchives, reports, events
- EM-14 · Accuracy Enhancementon saleMeasurement analysis and DataFeedback
Pages: Metering system maintenance · Outsourcing
Order a maintenance audit →📁Acceptance commissions and auditorsCommission members, inspectors, internal and external audit
Risk: the commission signs the certificate — and is accountable for everything it signs.
You get: an understanding of what to check on site and how, a document checklist and commission roles.
- EM-18 · Commissions and AuditsoonRemote and on-site audit, roles, conclusions
- EM-4 · Documentationon requestSeals, software versions, checksums, signatures
- EM-7 · Commissioning and Start-upon requestSAT acceptance criteria
- EM-13 · Verification Protocolson requestWhat a protocol must contain
Pages: Legal Shield
Prepare for the commission →📁Training and staff developmentHR, training centres, heads of departments
Risk: experience leaves with people, and newcomers are taught “from memory”.
You get: module packages for every role, training materials for your project and Train-the-Trainer programmes.
- EM GlossaryfreeOne team language: RU / EN / LV
- EM Module CatalogfreeThe whole library by lifecycle stage
- Role packageon requestMetrology, laboratory, procurement, operations, commissions
📁Students, graduates, scientistsUniversities, PhD students, researchers
Your task: find a relevant topic backed by real practice.
You get: in our materials — including the public ones — you will find topics for theses and dissertations.
- EM GlossaryfreeCustody transfer terminology
- EM-19 · Outlook and R&Don requestGUM, digitalization, compact provers, publications
- EM-11 · Error and Uncertaintyon requestA classic topic with practical examples
- EM-14 · Accuracy Enhancementon saleMethods proven on real sites
Pages: Publications
Discuss a research topic →The whole library — like folders on your computer
Open the folder and you will see all EM modules at once: what each covers and what is available right now.
EM Technical GuidePro meter › the whole module library22 modules
The whole library — like folders on your computer
Open the folder and you will see all EM modules at once: what each covers and what is available right now.
EM Technical GuidePro meter › the whole module library22 modules
Флагманский модуль · В продаже
EM-14 — методы повышения точности и достоверности измерений в системах коммерческого учёта
Тема, которая не устаревает: точность учёта — это деньги сторон, споры и ответственность.
Для кого
Заказчики и владельцы узлов учёта, проектировщики, метрологи и лаборатории, приёмочные комиссии. Студенты, аспиранты и докторанты — темы для дипломных и диссертационных работ.
Что внутри Public Professional Edition
- справочник на 52 страницы;
- где измерительная система теряет точность и как это обнаружить;
- как подготовить результат измерений к спору между сторонами — Legal Shield;
- справочные Excel-книги;
- лицензия и условия использования.
Public-версия показывает, где и почему теряется точность. Рабочие методики исправления — в NDA Expert Edition.
Модули в разработке можно заказать вне очереди, а набор модулей — под конкретный проект. Описать задачу
Services
Where Pro meter takes responsibility
Each direction is work we carry out and a topic the EM Technical Guide covers in writing. Start with the one closest to your project.
Rapid diagnosis — 60–120 minutes
A short online review of your situation: task, risks, next step. Afterwards — a brief note on what to do next: an audit, work under NDA, or your own resources are enough.
Unsure where to start? Write briefly: your industry, the project and its stage — a new project, a tender, issues with equipment orders, a design needed or problems with an existing design. We will understand each other in any language: we will draw up a simple questionnaire or come to you.
Metrological audit and expert review
Review of the metering station, documentation and protocols: scope, risks, next steps. Full audit and support for acceptance commissions — remotely or on site.
Request an auditLegal Shield
In the guide: EM-18 · EM-9 · catalog
Engineering and design
From customer requirements and the tender to design, FAT/SAT and commissioning. Input data review, specification packages, control of every discipline.
In the guide: EM-2 · EM-3 · EM-5 · EM-6 · EM-7 · catalog
Custody transfer
Metering on transit corridors, inter-company projects and marine terminals. Formulas, corrections, reconciliation rules and acceptance criteria — from day one to a dispute.
In the guide: EM-10 · EM-12 · EM-17 · catalog
Verification and calibration
Work on live systems while they keep running: procedures, protocols, uncertainty budgets, traceability to reference standards — in a form accepted by inspectors and the parties.
Maintenance and metrological support
The station is always ready for inspection: maintenance programmes, on-site checks, instrument register, calibration schedules during continuous operation.
MaintenanceMetrological outsourcing
In the guide: EM-16 · EM-22 · EM-15 · catalog
Publications and academic supervision
Preparing an article for a scientific or technical journal, a thesis or a dissertation? A technical editor, reviewer and supervisor — expertise beyond what the internet, AI and technical literature offer.
How we work
From the first e-mail to the result — four steps
Starting is safe: the first review is short, and materials can be anonymised.
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1
Task
You describe the situation by e-mail or via the contact form. Site and party names are optional.
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2
Review
Rapid diagnosis in 60–120 minutes: where the risks are, what the options are, what the next step is.
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3
Format
We agree on the form of work: an EM module, an audit, work under NDA or ongoing support. Scope, timing and terms — in writing.
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4
Work
We deliver under contract. The result is a document that withstands an inspector's review and a dispute between the parties.
What to send for the first review
- process flow diagram of the metering station;
- list of measuring instruments: type, diameter, ranges;
- current measurement and verification procedures;
- latest verification or calibration protocols;
- the metering section of the contract or transfer regulations;
- description of the problem: discrepancies, certificates, claims.
Send whatever documents you have — part of them is enough for a review.
Confidentiality from the first contact
Materials can be sent anonymised — with site, company and party names removed.
Working documents are exchanged after the NDA is signed.
We publish client and project names only with their consent.
Describe your taskExperience
Behind the methods — real sites
Everything in the EM Technical Guide has been proven on operating metering stations, terminals and transit corridors.
- 45+ yearsin custody transfer of oil and gas
- 20+ and 100+international and national projects
- 30+ yearswith Emerson equipment, certified for FB flow computers
Among our sites and partners
Ventspils oil terminal No. 703 · maintenance of oil metering stations at the Mažeikiai refinery · Latvijas Gāze · LatRosTrans · Ventamonjaks · NICHIMEN (Japan) · VNIIR and VNIIMS
Details on the projects, design features by section and innovations in our projects — in the module EM-6 “Design” · module catalog
New
What's published and what's coming
New materials come out every week. Check the news — everything recent is there.
Pro meter News
New modules, public editions, articles and events — short and to the point.
In development now
- EM-1295% ready · coming soon to the shop
- EM-1895% ready · coming soon to the shop
- EM-21 · public editionfor the autumn tenders
- EM-17 · Specification Alignment: Customer and Manufacturerin progress
Publications
Our articles in scientific and technical journals and applied materials on custody transfer and metrology.
Preparing an article?
Need a technical editor, reviewer or supervisor? Get in touch. We quickly get to grips with process technology and help with expertise beyond what the internet, AI and technical literature offer.
Describe your task — we'll start with a review
A few lines about the situation are enough. Site and party names are optional: the first review works with anonymised materials.
- Write in any language — we work in Russian, English and Latvian
- Confidential from the first contact
- Working documents — after NDA