RPV-1 Polymer Viscometer​

RPV-1 Two positions Polymer Viscometer PSL-Rheotek


RPV-1 Polymer Viscometer

The PSL Rheotek RPV-1  (2) Two position polymer viscometer system is suitable for measuring the dilute solution viscosity of a wide range of polymers dissolved in acids, organic solvents or water, including PA, PET, PVC, PLA, PBT, PC, PE, PP, Cellulose Acetate, Inks, bio-polymers and other.


  • RPV-1 systems are designed to be integrated with the SP-1 Sample Preparation system for polymers.
  • Other options include RPV275 Sample dissolution and RSS Rheotek Smart Sampler.
  • The PSL Rheotek RPV-1 (2) provides a reliable and precise system for measuring dilute solutions of polymers.
  • The RPV-1 automates the manual steps set out in standard methods, minimizing the variability of results.
  • Systems can be configured with 1 to 4 measuring positions. Other options include sample preparation,
  • sample dissolution and auto sampler.
  • Flow times are measured automatically using ASTM Ubbelohde viscometer tubes supplied with ISO 17025
  • certificates of calibration.
  • Cleaning is carried out in-situ utilizing solvents and a safe vacuum system.
  • The comprehensive RPV-1 software program records all measurement data as well as calculating a wide
  • range of results.


Standard Practice:

ASTM D2857 Determination of the dilute solution viscosity of polymers.


Test Methods General:

ISO 1628 Part 1 Determination of the reduced viscosity, intrinsic viscosity and K-value of polymers in dilute solution using glass capillary viscometers


Test Methods Polyamides (PA):

ASTM D789 Determination of the Relative Viscosity of Polyamide (PA)

ISO 307 Determination of viscosity number Polyamides


Test Methods Poly (Ethylene Terephthalate) PET:

ASTM D4603 Determination of the Inherent Viscosity of Poly (Ethylene Terephthalate) PET

ISO 1628 Part 5 Determination of the viscosity number (reduced viscosity) of  Poly (Ethylene Terephthalate) PET, poly (butylene terephthalate) PBT, poly (cyclohexylenedimethylene terephthalate) PCT and poly (ethylene naphthalate) PEN.


Test Methods Poly Vinyl Chloride (PVC):

ASTM D1243 Determination of the Inherent Viscosity of vinyl chloride polymers in cyclohexanone.

ISO 1628 Part 2 Determination of the reduced viscosity (viscosity number) and K-value of PVC resins.


Test Methods Cellulose Acetate:

ASTM D871 Testing Cellulose Acetate

ISO 1599 Determination of Viscosity Loss on moulding of Cellulose Acetate.


Other Test Methods:

ASTM D445 Standard Test Method for determination of kinematic viscosity

ISO 3104 Petroleum products – determination of kinematic viscosity

IP 71 Section 1 Kinematic Viscosity


PSL Viscometer tube type: AKV Ubbelohde, or RPVm Ubbelohde


RPV-1 (2)  PSL Rheotek Polymer Viscometer – two positions complete with viscometer bath, chiller, control module, two measuring heads, two filling stations, PC control system and PIAB vacuum system.



RPV start up kit including glass vials (144 pcs) and plastic caps (500 pcs)


Silicone bath oil


Mineral bath oil


Anti-corrosive coating – required for sulfuric acid and DCA applications


Third cleaning option – required for sulfuric acid or custom applications.


Split waste upgrade option


RPV StatsPack extraction of results to PC or LIMS



Polyamide is also known as nylon. Today this is used in airbags, automotive components and much more. Most people will be familiar with the product from consumer textiles. Depending on the grade of nylon, it may be dissolved in Formic Acid, M-Cresol or sulphuric acid.


PET Intrinsic Viscosity

PET a polymer, which is familiar to most of us. It is used world wide for drinks bottles. Under the name of polyester, it is also widely used in the textile industry. Most of the PET resin manufacturing plants in the world test the IV of their output product in compliance with ASTM D4603. The procedure of this test involves dissolving the polymer in highly hazardous chemicals. The automated viscometer from PSL Rheotek, the RPV-1, helps to minimise the operator exposure to the hazardous chemicals.

4 Item(s)


PVC K-Value

PVC is a strong, lightweight polymer commonly used in construction. Most of us will be familiar with it from PVC pipes used for domestic plumbing. In order to test the K-Value of the PVC, it is necessary to dissolve it first. ISO 1628 part 2 is the most common method. The PVC is dissolved in cyclohexanone prior to measurement.

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RPV-1 Polymer Viscometer

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