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Kelton is the leading independent flow measurement consultancy and software developer for the energy sector, with over 30 years of experience. Based in Aberdeen and operating globally, they help operators ensure every measurement is accurate, defensible, and audit-ready. 

Kelton holds UKAS accreditation to ISO 17020, the international standard for inspection bodies. Their team includes engineers with careers at Shell, Mobil, ExxonMobil, and QatarEnergy LNG. That depth of experience matters in an industry where mismeasurement means disputes, lost revenue, and regulatory exposure. 

EnergySys is the first and only company licensed to resell Kelton’s Common Calculation Library (KCCL): a continuously updated library of standardised flow measurement calculations that integrates directly with the EnergySys platform. For operators who need measurement calculations that track the latest industry standards, this integration provides a ready-made, auditable foundation. The logic is visible, the calculations are traceable, and the outputs can be shown to any auditor. 

As a Reseller partner, Kelton sells both software and services together. Everything can be invoiced under one contract. 

What Kelton delivers

Consultancy and assurance

Kelton provides flow measurement audits, uncertainty analysis, system design, and compliance verification. Whether an operator is designing new infrastructure or reviewing an existing system, Kelton assesses performance against international standards and identifies where measurement risk exists. 

Certification and auditing

Kelton delivers inspection and certification services accredited to ISO 17020. For operators under regulatory scrutiny or managing joint venture allocation disputes, that independent accreditation carries real weight. 

Training

Kelton offers practical and remote training programmes for flow measurement engineers, covering metering, uncertainty, and system compliance. 

Digital solutions

Kelton has developed a suite of software tools used by operators, system integrators, and regulators worldwide. These sit alongside KCCL and integrate with the EnergySys platform. 

Kelton’s software suite 

  • KCCL (Kelton Common Calculation Library): the industry-standard calculation library, licensed exclusively through EnergySys.
  • FloCalc: comprehensive flow measurement and fluid properties calculations, traceable to international standards, with full audit logs.
  • UncertaintyPlus: uncertainty assessment and modelling for flow measurement systems.
  • MeterManager: record, validate, and prove meter performance over time.
  • MeterVision: remote visibility into measurement data and system performance.

Areas of expertise

  • Flow measurement audits, uncertainty analysis, and system design.
  • Fiscal metering and allocation fairness.
  • LNG measurement: liquefaction, transportation, and regasification, to GIIGNL standards.
  • Hydrogen and CO2 transport measurement.
  • CCUS flow measurement and verification.
  • Environmental and emissions measurement.
  • KCCL integration and EnergySys implementation.
  • Measurement training and long-term support partnerships.

Working with a partner 

Kelton is a Reseller partner. They sell both services and software, so everything can be invoiced under one contract. You receive first and second-line support from Kelton directly. EnergySys provides third-line support for the platform. 

Need a partner for your project? Fill in the form, and we’ll take it from there. Every enquiry starts with a review call with EnergySys, where we get to understand your goals, your timeline, and your specific requirements. From there, we’ll match you to the partner in our network best placed to help, and introduce you directly. No cold handovers.