Metrological assurance — the foundation of custody transfer accounting
Pro meter SIA · 45+ years of custody transfer practice
Knowledge that protects your project
Oil and gas custody transfer — without errors, losses or disputes.
We know what to do at every stage of a project — and we will teach your team to do the same. We can join from the very beginning or take over at any stage, even when the project seems hopeless.
With our materials, your engineers, managers and commission members work with confidence: they are protected by knowledge, documentation and legal certainty. That means your job, your reputation and your money stay safe.
People say we are lucky. That is true — but our luck is backed by knowledge.
- We know what to doTechnically and metrologically justified decisions
- We know why it is rightStandards, traceability, accuracy
- We protect the resultDocuments and evidence that withstand a dispute
Who are you in the project?
Choose your role — we will show what matters to you, which modules and services will help, and where to start.
Available Coming soon On request Free
📁Managers and project leadersDecision-makers, technical directors, project managers
Risk: decisions made at the start determine metering accuracy — and the money — for decades ahead.
You get: a view of the entire metering chain, control points for every stage and an independent expert assessment.
- EM-10 · Metrological Supporton requestThe framework: measurement, verification, laboratory, transfer act — as one system
- EM-3 · Engineering A–Zon requestThe full metering station route and where costly mistakes arise
- EM-18 · Commission & Auditcoming soonReport for decision-makers: risks, findings, next step
Pages: Custody Transfer · Our Projects
Order an express diagnostic →📁Developers, manufacturers, dealersOEMs, equipment suppliers, dealers
Risk: an instrument performs perfectly on the test bench — and fails to hold accuracy under real site conditions.
You get: an understanding of what the buyer actually needs, real operating requirements and feedback from the field.
- EM-17 · Specification Alignmenton requestWhat the buyer wants and what to offer
- EM-15 · Instruments Overviewon requestAdvantages and limitations in equipment selection
- EM-14 · Accuracy ImprovementavailableConfiguration, redundancy, alarm logic, DataFeedback
- EM-19 · Perspectives & 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 the stronger evidence.
You get: traceability of the result from reference standard to transfer act, and an evidentiary base for any dispute.
- EM-12 · Verification Schemecoming soonStandard → laboratory → prover → mass meter → flow computer → act
- EM-13 · Verification Protocolson requestThe evidentiary chain for every measurement channel
- EM-11 · Error & Uncertaintyon requestMPE and GUM: how to defend the result in a dispute
- EM-9 · Data & Reportingon requestFiscal data, data substitution, audit trail
Pages: Legal Shield
Analyse a discrepancy →📁Design engineersProcess, instrumentation and control, electrical, civil
Risk: every design section affects the accuracy of the commercial result — even civil works.
You get: metrological requirements for each section and a design that passes FAT/SAT without rework.
- EM-5 · Pre-Designon requestTerms of Reference, FEED, measurement method and accuracy class
- EM-6 · Designon requestHow each design section affects accuracy
- EM-17 · Specification Alignmenton requestWhat the factory engineer expects to receive
- EM-4 · Documentationon requestEvidence matrix for audit and dispute
- EM-22 · Quality Control Skidon requestQCS, in-line density, sampling probe isokinetics
Pages: Metering Station Engineering
Order a design review →📁Commissioning engineersLead engineers: start-up, commissioning, methods, protocols
Risk: an error built in at commissioning can stay invisible for years — while money is lost every day.
You get: a step-by-step control sequence and working protocols for every measuring instrument.
- EM-7 · Start-Up & Commissioningon requestInstallation, loop check, SAT, first commercial result
- EM-13 · Verification Protocolson requestMass meter, prover, densitometer, P, T, flow computer
- EM-21 · Field Verificationon requestPreparation, protocol-based measurements, report
- EM-14 · Accuracy ImprovementavailableEliminating systematic error components
Pages: Calibration & Verification
FAT/SAT support →📁Metrologists and laboratoriesMetrologists, accredited laboratories, verification officers
Risk: the certificate exists, but the traceability chain is broken — and the result loses its legal force.
You get: complete traceability, methods and uncertainty budget logic.
- EM-10 · Metrological Supporton requestMetrology of commercial operations as a system
- EM-12 · Verification Schemecoming soonTraceability scheme T / P / ρ / V
- EM-17 · Specification Alignmenton requestBoth parties’ normative base — from the factory design
- EM-11 · Error & Uncertaintyon requestUncertainty budget: a mass meter example
- EM-8 · Laboratorieson requestMethods, FloBoss S600+ flow computer verification
Pages: Laboratories · Calibration
Discuss your laboratory →📁Economists and lawyersContract, finance and legal departments
Risk: the contract is legally flawless but technically vulnerable — and the dispute is lost on metrology.
You get: Legal Shield — contracts, documents and evidence that withstand a dispute. Legal theory is only the foundation here. What matters most is a consultation with a lead engineer who knows every possible risk.
- EM-4 · Documentationon requestDocuments as management and financial protection
- EM-9 · Data & Reportingon requestFiscal data integrity and audit trail
- EM-17 · Specification Alignmenton requestTechnical risks to address in the contract
- EM-11 · Error & Uncertaintyon requestThe bridge between calculation, certificate and contract
- EM-18 · Commission & Auditcoming soonEvidence for claims and commissions
Pages: Legal Shield
Consult a lead engineer →📁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 qualifications.
- Tender GuidefreeWhere to start when preparing a tender
- EM-2 · Tender & Biddingon requestThe tender as the project’s first technical act
- EM-5 · Pre-Designon requestRisk checklist before the tender is announced
- EM-17 · Specification Alignmenton requestExactly what you are buying and what the supplier is selling
📁Operation and maintenanceMetering station manager, operators, maintenance team
Risk: the system works — until the verification or a claim arrives.
You get: maintenance levels 1/2/3, verification readiness, quality control and an orderly protocol archive.
- EM-16 · Technical Maintenanceon requestProcedures, diagnostics, readiness for result acceptance
- EM-22 · Quality Control Skidon requestProduct quality and in-line density
- EM-9 · Data & Reportingon requestArchives, reports, events
- EM-14 · Accuracy ImprovementavailableMeasurement analysis and DataFeedback
Pages: Metering Station Maintenance · Outsourcing
Order a maintenance audit →📁Acceptance commissions and auditorsCommission members, inspectors, internal and external audit
Risk: the commission signs the act — and is responsible for what it did not check.
You get: an understanding of what to check on site and how, a document checklist and commission roles.
- EM-18 · Commission & Auditcoming soonRemote and field audit, roles, findings
- EM-4 · Documentationon requestSeals, software versions, checksums, signatures
- EM-7 · Start-Up & Commissioningon requestSAT acceptance criteria
- EM-13 · Verification Protocolson requestWhat a protocol must contain
Pages: Legal Shield
Prepare for a commission →📁Training and staff developmentHR, training centres, department heads
Risk: experience leaves with people, and newcomers are taught “from memory”.
You get: module packages for each role, training materials for your project and Train-the-Trainer programmes.
- EM GlossaryfreeA common language for the team: RU / EN / LV
- EM Module CatalogfreeThe whole library by project lifecycle stage
- Role packageon requestMetrology, laboratory, procurement, operation, commissions
📁Students, graduates, researchersUniversities, PhD students, researchers
Your task: find a relevant topic backed by real practice.
You get: in our materials — even the public ones — you will find topics for theses and dissertations.
- EM GlossaryfreeCustody transfer terminology
- EM-19 · Perspectives & R&Don requestGUM, digitalisation, compact provers, publications
- EM-11 · Error & Uncertaintyon requestA classic topic with practical examples
- EM-14 · Accuracy ImprovementavailableMethods proven on real facilities
Pages: Publications
Discuss a research topic →The whole library — like folders on your computer
Open the folder to see every EM module at once: what each one covers and what is available now.
EM Technical GuidePro meter › complete module library22 modules
Site map — everything in one window
Pro meter sections as folders: open one and go straight to the page.
Pro meter companyWho we are, our experience and completed projects2 pages
About Pro meterPro meter SIA, Ventspils: 45+ years of custody transfer practice Our ProjectsCompleted facilities and engineering solutionsCustody transfer and engineeringThe engineering foundation: from specification to operation5 pages
Custody TransferWhere measurement turns into money — and how to protect it Metering Station EngineeringDesigning and building metering systems Tender GuideWhat to specify before choosing a supplier — free Metering Station MaintenanceMaintenance, diagnostics, verification readiness Engineering ReferenceOverview of Pro meter engineering materialsMetrology and Legal ShieldVerification, calibration, evidentiary protection of the result2 pages
Calibration & VerificationTraceability and practical metrology Legal ShieldProtocols, archives, evidence for disputes and commissionsServicesEngineering work for your specific task3 pages
LaboratoriesLaboratory support, methods, accreditation For Dealers & ManufacturersCooperation with OEMs and equipment dealers OutsourcingContract-based metrological supportTechnical Guide and ShopEM modules, glossary, purchase4 pages
EM Technical Guide ShopPublished modules to buy and download EM Module CatalogThe whole library by project lifecycle stage EM-14 · Accuracy ImprovementPublished module — Public and NDA Expert EM GlossaryCustody transfer terminology RU / EN / LV — freeNews, publications, contactWhat is new, articles and how to reach us4 pages
NewsEvents, module releases, meetings BlogNotes and comments on custody transfer practice PublicationsPro meter articles and professional positions ContactDescribe your task — we will propose a route to the solutionFlagship module · Available now
EM-14 · Methods for Improving Accuracy and Measurement Assurance in Custody Transfer Metering Systems
A topic that never goes out of date: metering accuracy means the parties’ money, disputes and liability.
Who it is for
Owners and operators of custody transfer metering stations, design engineers, metrologists and laboratories, acceptance commissions. Students, PhD candidates and researchers — topics for theses and dissertations.
Inside the Public Professional Edition
- a 52-page handbook;
- where a metering system loses accuracy and how to detect it;
- how to prepare a measurement result for a dispute between the parties — Legal Shield;
- Excel reference workbooks;
- licence and terms of use.
The Public edition shows where and why accuracy is lost. Working correction methods are in the NDA Expert Edition.
Modules in development can be ordered ahead of schedule, and a set of modules can be assembled for a specific project. Describe your task
Services
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.
Express diagnostic — 60–120 minutes
A short online review of your situation: the task, the risks, the next step. You receive a brief memo on what to do next — an audit, work under NDA, or your own team is enough.
Not sure where to start? Write briefly: your industry, what the project is and its stage — a new project, a tender, problems ordering equipment, a design needed or problems with the design. We will understand each other in any language: we’ll prepare a simple questionnaire or come to you.
Metrology Review & Audit
A review of your metering station, documents and protocols: scope, risks, next steps. Full audit and acceptance-commission support — remotely or on site.
In the Guide: EM-18 · EM-9 · catalog
Engineering & Design
From customer requirements and tender to design, FAT/SAT and commissioning. Source-data audit, specification packages, control of every discipline.
In the Guide: EM-2 · EM-3 · EM-5 · EM-6 · EM-7 · catalog
Custody Transfer
Fiscal 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
Calibration & Verification
Field work on live systems without shutdown: methods, protocols, uncertainty budgets and traceability to standards — in a form accepted by inspectors and the parties.
Technical Service & Metrology Support
The station stays inspection-ready: maintenance programmes, in-situ control, instrument register, calibration schedules without disruption.
Technical serviceMetrology outsourcing
In the Guide: EM-16 · EM-22 · EM-15 · catalog
Publications & Scientific Supervision
Preparing a journal article, a thesis or a dissertation? A technical editor, reviewer or supervisor — with what you won’t find online, in AI or in technical literature.
How we work
From first message to result — four steps
You can start without risk: the first review is short, and materials can be anonymised.
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1
Task
You describe the situation by email or through the contact form. The site and the parties need not be named.
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2
Review
Express diagnostic, 60–120 minutes: where the risks are, what the options are, what the next step is.
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3
Format
We agree 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 stands up to an inspector’s review and a dispute between the parties.
What to send for the first review
- the process flow diagram of the metering station;
- the list of measuring instruments: type, diameter, ranges;
- current measurement and verification procedures;
- the latest verification or calibration reports;
- the metering section of the contract or custody transfer rules;
- a description of the problem: discrepancies, reports, claims.
Don’t have everything? Send what you have — part of it is enough for a review.
Confidential from the first contact
Materials can be sent anonymised — without names of sites, companies or parties.
Working documents are exchanged after an NDA is signed.
We name clients and projects only with their consent.
Describe your taskExperience
Real sites behind the methods
Everything in the EM Technical Guide has been tested on operating metering stations, terminals and transit corridors.
- 45+ yearsin oil and gas custody transfer metering
- 20+ and 100+international and national projects
- 30+ yearswith Emerson equipment, FB flow computer certificate
Among our sites and partners
Ventspils crude oil terminal No. 703 · crude oil metering station maintenance at the Mažeikiai refinery · Latvijas Gāze · LatRosTrans · Ventamonjaks · NICHIMEN (Japan) · VNIIR and VNIIMS
Project details, design specifics by discipline and the innovations in our projects are in module EM-6 · Design · module catalog
What’s new
What’s published and what’s coming
New material comes out every week. Check the news for everything that has appeared recently.
Pro meter News
New modules, public editions, articles and events — short and to the point.
In development now
- EM-1295% ready · coming to the shop
- EM-1895% ready · coming 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 material on custody transfer metering and metrology.
Preparing an article?
Need a technical editor, reviewer or supervisor? Get in touch. We get to grips with technological processes quickly and help with what you won’t find online, in AI or in technical literature.
Describe your task — we’ll start with a review
A few lines about the situation are enough. You need not name the site or the parties: the first review can be done on anonymised material.
- Write in any language — we work in English, Russian and Latvian
- Confidential from the first contact
- Working documents — after NDA