Mechatest and GGS Oil & Gas Systems

    Sampling systems

    From closed-loop crude oil samplers to ISO 10715 gas conditioning panels - Mechatest engineers sampling systems where representativity is the deliverable.

    Overview

    Representative sampling for liquid, gas and LPG - engineered to ISO and API.

    Mechatest specialises in representative sampling systems for fiscal, custody-transfer and quality applications across oil, gas and chemicals. Every system is engineered around the actual process conditions - phase, viscosity, pressure, temperature and contaminants - to ensure the sample reaching the analyser or laboratory cylinder is unchanged from the bulk fluid.

    Our scope spans closed-loop liquid sampling (ISO 3171, API MPMS Ch. 8), natural and process gas conditioning (ISO 10715), constant-pressure LPG sampling (ISO 4257), and full sonic-nozzle test rigs. Systems are delivered as fully assembled, leak-tested panels with documentation packages ready for site integration.

    Key specifications
    Headline performance data
    Standards
    ISO 3171 · 10715 · 4257 · API 8
    Pressure
    up to 250 bar
    Materials
    316L SS · Hastelloy · Monel
    ATEX
    Zone 1 / 2 certified
    Applications & industries

    Where it's used

    Sampling systems from the Gas Measurement Group are deployed across the global energy value chain - from transmission networks to industrial end-users.

    Crude & refined products

    Closed-loop samplers at refineries, terminals and pipeline custody transfer points.

    Natural gas & GC feed

    Sample probes and conditioning panels feeding gas chromatographs at custody transfer stations.

    LPG, NGL & ethylene

    Constant-pressure sampling for liquefied gas trade documents and quality control.

    Petrochemical & specialty

    Engineered conditioning for analysers in aggressive or high-purity service.

    Range

    Available products & solutions

    Supplied by Mechatest and GGS Oil & Gas Systems

    [Photo: Liquid & gas sampling systems]
    Mechatest
    Liquid & gas sampling systems
    Manual and automatic sampling systems for liquid hydrocarbons and process gases – from probe to analyser, designed to ISO 3171, ISO 10715 and API MPMS Ch. 8.
    Standards
    ISO 3171 · 10715 · API 8
    Phases
    Liquid & gas
    Pressure
    up to 250 bar
    Material
    316L SS
    LiquidGasCustody transfer
    [Photo: FPSO sampling systems]
    Mechatest
    FPSO sampling systems
    Offshore sampling systems for FPSO, FSO and FLNG platforms – representative sample collection for crude oil, produced water and gas under marine conditions.
    Application
    FPSO / FSO / FLNG
    Media
    Crude · gas · produced water
    Type
    Manual & automatic
    Standard
    ISO 3171 · API 8
    OffshoreFPSOMarine
    [Photo: Automatic sampling systems]
    Mechatest
    Automatic sampling systems
    Automatic sampling systems for continuous, representative grab and spot sampling of crude oil, refined products and chemicals into laboratory containers.
    Type
    Automatic grab / spot
    Media
    Crude · diesel · jet · chemicals
    Standard
    ISO 3171 · API 8
    Volume
    0.5–2 L typical
    AutomaticBottleOEM
    [Photo: Steam & water sampling (SWAS)]
    Mechatest
    Steam & water sampling (SWAS)
    Steam and water analysis systems for power and process plants – continuous sampling, conditioning and analysis of boiler feedwater, steam and condensate to ASME and VGB guidelines.
    Application
    Power / process
    Parameters
    pH · conductivity · SiO₂
    Standard
    ASME · VGB
    Type
    Rack / panel
    SWASPowerWater
    [Photo: Sampling components]
    Mechatest
    Sampling components
    Sampling components including spring-return handles for Swagelok, Hoke and Fitok valves, sample cylinders, fittings and panels for building and maintaining sampling systems.
    Components
    Handles · cylinders · fittings
    Compatibility
    Swagelok · Hoke · Fitok
    Material
    316L SS
    Function
    Shut-off · transport
    ComponentsValvesOEM
    [Photo: Analyser systems]
    GGS
    Analyser systems
    Analyser integration and conditioning systems for hydrogen measurement, oxygen measurement and SWAS applications – from sample conditioning to analyser shelter integration.
    Parameters
    H₂ · O₂ · Wobbe · CV
    Systems
    SWAS · conditioning
    Standards
    ISO 6974 · 6976
    Integration
    Panel to shelter
    HydrogenOxygenAnalyserGGS
    [Photo: Sampling probe systems]
    GGS
    Sampling probe systems
    Engineered probes for representative gas sampling at custody transfer stations.
    Pressure
    up to 100 bar
    Material
    316L SS
    Standards
    ISO 8943
    ATEX
    Yes
    SamplingProbeGGSGIIGNLEN 12838ISO 8943
    [Photo: ISO8943 Intermittent LNG sampling systems]
    GGS
    ISO8943 Intermittent LNG sampling systems
    Intermittent sampling systems for LNG custody transfer and quality measurement, designed and built to ISO 8943 with integrated vaporization and conditioning for laboratory analysis.
    Standard
    ISO 8943
    Application
    LNG custody transfer
    Type
    Intermittent
    Integration
    Vaporizer · conditioning
    LNGISO 8943SamplingGGSCryogenic

    Discuss your sampling systems requirement

    Our team will scope, quote and (if needed) prototype the right solution for your site.

    The complete gas measurement chain - six specialist companies covering precision components, flow meters, metering systems, and calibration.

    Group

    Onderzeel 6, 2920 Kalmthout, Belgium
    info@gmg-group.com
    +32(0)3 217 97 70
    © 2026 Gas Measurement Group · Belgium & Netherlands