Custody-Transfer / Fiscal Gas Metering
Fiscal/custody gas measurement only when selected configuration and calibration qualify.
Engineering custody-Transfer / Fiscal Gas Metering for the real process
Custody-transfer or fiscal gas metering is a controlled measurement duty because the commercial value of the transferred gas depends on the agreed metering system, uncertainty, calibration, installation, diagnostics, compensation, data handling, and applicable standards. The meter must be evaluated as part of the complete metering system, not as an isolated flow sensor.
Blue Dragon can review suitable ultrasonic configurations, but final fiscal use depends on the exact model/configuration, calibration and approval basis, pipe and flow conditions, pressure/temperature compensation, gas properties, flow computer or supervisory system, contractual requirements, and the authority responsible for acceptance.
What the application needs to establish
Fiscal/custody gas measurement only when selected configuration and calibration qualify. Define the required range, units, response, accuracy or uncertainty, alarm/use case, and comparison or reference basis before configuration.
Why the measurement matters
Process visibility
Measure gas movement for operation, balancing, control, and troubleshooting.
Energy and utility management
Quantify natural gas, fuel gas, process gas, or other qualified services.
Flare and vent monitoring
Provide flow information across low, variable, or demanding gas conditions where a suitable configuration is available.
Measurement confidence
Match meter geometry, signal quality, installation, compensation, calibration, and verification to the required uncertainty.
How the measurement is approached
A gas-flow meter can be used for custody-transfer or fiscal duty only when the exact meter configuration, metrological performance, calibration, installation, diagnostics, applicable standards, contractual requirements, and approval basis qualify it for that service. This page does not establish blanket fiscal approval.
Typical operating locations
- Pipeline metering stations
- Gas transfer and allocation systems
- City gates and terminal interfaces
- Contractual gas-transfer points where the exact meter configuration is approved
Instrument-selection considerations
- Pipe size, schedule, material, internal condition, and available access
- Gas composition, pressure, temperature, density or speed-of-sound basis
- Minimum, normal, and maximum flow or velocity
- Required accuracy, repeatability, turndown, response, and reporting basis
- Straight run, upstream/downstream disturbances, flow conditioning, and acoustic path quality
- Inline or insertion installation, hazardous area, power, communications, pressure/temperature compensation, and calibration or verification
Where this application is used.
Natural Gas & LNG
Measurement solutions for gas processing, sweetening, liquefaction, LNG quality, gas flow, utilities, and materials verification.
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Pipelines & Midstream
Application-focused instrumentation for Pipelines & Midstream, covering Pipeline gas quality, dew point, H2S and sulfur, flow, and portable verification across Transmission pipelines, compressor stations, meter stations, and terminals.
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Petrochemicals
Measurement systems for petrochemical feedstocks, reaction processes, fired equipment, utilities, effluent, gas flow, and material quality.
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Chemical Processing
Application-focused instrumentation for Chemical Processing, covering Trace moisture, H2S and sulfur, TOC, flow, and multipoint temperature across Reactors, columns, specialty gas systems, and utilities.
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Hydrogen & Syngas
Application-focused instrumentation for Hydrogen & Syngas, covering Ultra-trace moisture, dew point, gas flow, H2S where relevant, and temperature across Electrolysis, reforming, purification, and compression.
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Biogas & Renewable Gas
Application-focused instrumentation for Biogas & Renewable Gas, covering H2S, moisture, gas flow, and pipeline-quality verification across Digesters, upgrading, compression, and injection.
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Coal & Coal Chemical
Application-focused instrumentation for Coal & Coal Chemical, covering Gas moisture, H2S and sulfur, gas flow, XRF coal/ash, and water quality across Gasification, coke oven gas, syngas, and coal chemicals.
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Power Generation
Measurement systems for fuels, boiler and high-purity water, fired equipment, gas flow, materials, and conventional or nuclear generation.
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Cement, Glass & Ceramics
Application-focused instrumentation for Cement, Glass & Ceramics, covering XRF composition, kiln temperature, flue-gas flow, and research QC across Raw mix, kiln, clinker, and glass batch.
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Environmental Monitoring & Compliance
Application-focused instrumentation for Environmental Monitoring & Compliance, covering Oil-in-water, turbidity, TOC, emissions flow, and XRF soil screening across Wastewater discharge, emissions, contaminated land, and compliance labs.
Explore →Relevant measurement capabilities.
Explore the permanent Blue Dragon capability areas associated with this industry or application.
Blue Dragon BDT Flow Measurement Series
Ultrasonic gas-flow measurement instruments engineered and manufactured by Lauris Technologies, Canada, and supplied and supported by Blue Dragon Technology.
Explore series →Instruments connected to this application.
Available
Lauris FF1225-A Single-Path Inline Ultrasonic Gas Flow Meter
Single-path inline ultrasonic gas flow meter for flare gas, vent gas, associated gas, flue gas, natural gas and industrial process-gas measurement across an exceptionally wide velocity range.
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Available
Lauris FF2225-A Dual-Path Inline Ultrasonic Gas Flow Meter
Dual-path inline ultrasonic gas flow meter for flare gas, natural gas, blended gas, associated gas and industrial process streams requiring greater accuracy and measurement confidence.
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Available
Lauris FF1225-G Vertical-Port Insertion Ultrasonic Gas Flow Meter
Vertical-port insertion ultrasonic gas flow meter for low-velocity flare, vent, natural gas, biogas and process-gas applications where side access is limited.
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Available
Lauris FF1225-XT Extreme-Temperature Ultrasonic Gas Flow Meter
Extreme-temperature waveguide ultrasonic gas flow meter for cryogenic and high-temperature flare, process-gas, furnace, refinery, petrochemical and power-generation applications.
View instrumentRelevant verified references.
Applicability depends on the instrument configuration, sample matrix, method scope, and project requirements. Confirm the final method basis during application review.
- Applicable fiscal/custody-transfer metering standards, approvals, calibration requirements, uncertainty limits, contractual rules, and local regulatory requirements must be confirmed for the exact project. A Blue Dragon relationship or web page does not establish blanket custody-transfer approval.
Related applications.
Industrial Gas Flow Measurement
Ultrasonic gas-flow measurement for inline and insertion applications across natural gas, process gas, fuel gas, flare, vent, and high-temperature services.
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Extreme-Temperature Gas Flow Measurement
Gas-flow measurement at cryogenic or high process temperatures.
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Wet / Dirty Gas Flow Measurement
Ultrasonic flow measurement in gas with liquid/solid contamination after review.
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Application questions.
Does this page mean every Lauris meter is custody-transfer approved?
No. Fiscal or custody-transfer suitability is configuration-, calibration-, installation-, standard-, and project-specific.
What should be supplied for a fiscal metering review?
Provide the governing standard/contract, required uncertainty, flow range, pipe details, gas composition, pressure and temperature, metering architecture, calibration/verification requirements, communications, diagnostics, and approval process.
Is the meter the whole custody-transfer system?
No. Pressure and temperature measurement, flow computation, gas properties, calibration, diagnostics, data handling, seals/security, documentation, and station design may all be part of the metering system.
Who accepts the final measurement system?
Acceptance is governed by the buyer, seller, project specification, metrology authority or regulator where applicable, and the agreed contractual/technical procedure.
Discuss your custody-transfer / fiscal gas metering requirement.
Provide the process or sample, expected range, pressure and temperature where relevant, composition or matrix, installation conditions, required outputs, reference method, documentation, and project timeline.