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psl rheotek United Scientific supplies Rheotek Viscosity Testing and Measurement Laboratory Equipment in Southern AfricaEstablished in 1850, Poulten Selfe & Lee (PSL), is a manufacturer of high quality glass capillary viscometers as well as the "PSL-RHEOTEK" range of automatic viscometer systems.

PSL provides direct viscosity measurement traceability from an in-house master viscometer scale maintained in accordance with international standards. The PSL Calibration Laboratory is accredited by the United Kingdom Accreditation Service and offers a range of ISO 17025 viscometer calibration services, as well as viscosity reference materials.RHEOTEK is a trademark of Poulten Selfe & Lee Ltd. The PSL-RHEOTEK range of instruments include viscometer baths and automatic viscometers suitable for the precision measurement of petroleum liquids, polymers, pulp and inksTogether with its partners, PSL also offers a range of other physical petroleum testing apparatus including cold properties and sulphur analysis.


RHEOTEK™ Automatic Viscometers are suitable for the measurement of viscosity of a wide range of petroleum products including:

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The RHEOTEK Automatic Viscometer (AV-2) provides a reliable and precise method for measuring lubricants.

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The PSL Rheotek BIOVIS is a fully automated kinematic viscosity system with two measuring positions and visibility bath. Flow times are measured in high precision ASTM Ubbelohde viscometer tubes. Cleaning is carried out automatically in-situ. Reported kinematic viscosity results are in full compliance with ASTM D445, IP71, ISO 3104.

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The RHEOTEK AKV-diesel provides a reliable and precise method for measuring gas oils, distillate fuels and diesels at 40 deg. C.

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PSL supplies a complete range of ASTM, IP and STPTC thermometers. These instruments are used by many leading petroleum laboratories throughout the world and enjoy an excellent reputation for quality workmanship and accuracy of calibration.

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