Sampler Custody Transfer 34-SAMSS-525

Custody transfer sampling for fiscal metering

For Aramco custody transfer measurement you need custody transfer sampler type 34-SAMSS-525 System, these automatic sampling systems are used to accurately determine the quality of the custody transfer (crude) oil samples. Custody transfer sampler type 34-SAMSS-525 systems are used to collect representative samples on custody transfer to be analyzed in a laboratory.

The custody transfer sampler type 34-SAMSS-525 allows the quality e.g. water and sediment content of a crude oil pipeline transfer to be established. This together with the metered quantity is used to calculate the product volume for commercial and fiscal transactions. The automatic custody transfer sampling is used in Aramco crude oil applications, which commonly contain crude, water and sediment. 


Custody Transfer Crude Oil Sampling Systems are designed conform the Standard Practice for Aramco custody transfer sampler type 34-SAMSS-525, Automatic Sampling of Petroleum and Petroleum Products API 8.2, ASTM D.4177  and ISO-3171 standards with an automatic sampler probe, sample receivers, PLC controller.

The Automatic Probe sampler is the basic and most important integral part of the automatic inline probe sampling systems, it is a heavy duty reliable and accurate sample extraction device, which is designed to be mounted directly on the main pipeline and takes continiously grab crude oil samples of 1 ml volume, the sampler is actuated by a solenoid valve which is driven by a controller, generating either a flow proportional or time based signal, depending on the process. The Automatic Probe sampler is an integral part of the inline probe sampling systems. 

Sample receivers, samples collected with the automatic fast-loop or in-line samplers are transferred to a sample receiver for storage.

Sampler Custody Transfer Standards

There are three well-known sampling standards that are used worldwide for custody transfer sampling of crude oil. Standards both for the automatic liquid sampling in fast loop and inline sampling systems designed and built by Doedijns are based on the API 8.2, ISO-3171 and ASTM D.4177 standards and the equipment totally complies with these. 

  • Aramco custody transfer sampler type 34-SAMSS-525
  • API 8.2: Standard Practice for Automatic Sampling of Petroleum and Petroleum Products 
  • ASTM D.4177: Standard Practice for Automatic Sampling of Petroleum and Petroleum Products
  • ISO-3171: Petroleum liquids - Automatic pipeline sampling
  • Other standards (e.g. GOST) may be specified.

Representative Custody Transfer Crude Oil Sampling Systems

The big advantage of crude oil custody transfer systems conform Aramco custody transfer sampler type 34-SAMSS-525 and API 8.2 is the possibility to take a flow proportional or time based sample. With automatic grab sampling you get an average sample in the sample receivers from a whole blend or pipeline transfer to calculate the product volume for commercial and fiscal transactions. We have improved our automatic sampling systems for crude oil liquids by:

  • Creating closed loop systems emission free which provide a safe, controlled environment
  • Suitable for high pressure process application
  • In-the-line or fast-loop samplers
  • Fixed or variable volume receivers
  • Simplifying designs, making the sampling of liquid and gas more efficient
  • Proper discharge of excess liquid or gas prevents unwanted pressure build-up in the system

These modern solutions simply regard the sampling systems themselves. Our worldwide reputation rests on the combination of excellent systems, and professional services by our team of specialists.


Enjoy the full benefits of an experienced team of passionate professionals

Mechatest employees possess decades of experience and knowledge. All of which is at your disposal when your sampling system needs adaptations, maintenance or repairs. Our staff has high-tech equipment at their disposal, thus increasing their efficiency even more. We are even capable of designing and manufacturing in accordance with foreign codes and standards.


Start improving by sampling process today

Why wait any longer? Improvement starts today if you pick up the phone and call us at +31 (0)15 – 310 51 83. Our staff provides you with all the information you need to make an informed decision and choose the best sampling systems for liquid or liquefied gas.


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Custody Transfer Sampling API 8.2, Crude Oil Liquid Sampler, Automatic liquid sampling, ISO-3171, ASTM D.4177 sampling, Air actuated sample extractor, Automatic sampling, inline probe sampling systems, water and sediment in crude oil sampling,
Custody Transfer Sampling - Crude Oil Liquid Sampler by Doedijns

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