Automatic Sampling Systems for
Refined and Intermediate Products

Automatic Sampling Systems for a wide variety of liquid petroleum products

Flow MD’s Programmable Automatic Sampling Systems draw a representative sample of hydrocarbon products to determine the products compositional quality. When combined with a metered quantity, sampling results are used to calculate the product volume for process control, allocations, and financial transactions.

For enhanced performance, optional instrumentation such as densitometers, flow meters, and water cut meters can be added, creating a customized combined fast loop sampling and analysis package.

Utilizing a precision electric servo pump ensures a consistent sample size every stroke without the worry of line pressure, pneumatic, or hydraulic pressure. Adjustable sample grabs can range in size from 1 to 75 ccs.

FMD Sampler System Applications

Refined and Intermediate Products

  • Gasoline
  • Jet Fuel
  • Kerosene
  • Diesel
  • Fuel Oil
  • Naphtha
  • Reformate
  • Gas Oils
  • Transmix

FMD Sampler System Features

  • Pneumatic, hydraulic or all-electric configurations available
  • Variable Sample grab sizes
    • Programmable from 1 cc to 75 ccs per stroke
    • Software configurable
    • Can be changed on the fly for different flow rates or batch sizes
  • Scalable design can be configured from 1 to 16 sample vessels per unit
  • Automated purge system to prevent cross-contamination between batches
  • Fully customizable operation, easily adaptable for any application
  • Intelligent self-diagnostics
  • Class I Div 1 Hazardous Area classification
  • Meets all API MPMS Chapter 8.2 requirements for automatic sampling

FMD Sampler System Options

  • System can be configured with various online analytical equipment including:
    • Densitometers
    • BS&W / Water cut meters
    • Optical Interface Detection
    • Flow meters to ensure proper fast loop performance
  • Weigh scale system for real-time verification of system operation
  • System can be controlled by an external source (control room, flow computer, PLC etc…) or can be fully autonomous
  • Can be installed in a sampling building or stand-alone cabinet

FMD Sampler System Specifications 


  • Fast Loop – Refined and Intermediate Products

Electric Sample Pump:

  • Precision Servo Controlled

Variable Sample Size

  • Up to 75 cc with standard pump
  • Programmable index grab sizes (ex: 10, 15, 25, 50 cc etc…)

Pulse Input:

  •  Simulates pneumatic solenoid sequence

Inputs & Outputs:

  • Analog and/or digital

Communication Methods:

  • Contact us with your requirements


  • Custom options available – Contact us with your requirements

Valving Control Options:

  • All-electric offering the lowest maintenance and trouble-free operation
  • Pneumatic and hydraulic valve operator options available

System Integration:

  • Programmable for existing PLC
  • Can be purchased with optional PLC controller

Scales for Sample Verification:

  • Optional


  • Standard: Up to ANSI 600 # Service
  • Optional: Higher pressure options are available – Contact us with your requirements

Input Voltage:

  • Standard: 115 – 230 VAC
  • Optional: 3 phase DC

Hazardous Area Use:

  • Class 1 Div 1

Sample Retention Vessels:

  • Systems are customizable to work with almost any container type 

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