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Poulten Selfe & Lee Ltd
Russell House
Burnham Business Park
Burnham on Crouch
Essex CM0 8TE
United Kingdom

Tel: +44 (0)1621 787100
Fax: +44 (0)1621 787175
E-mail: info@rheotek.com
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RHEOTEK RPV-1 - 2 Position

  • 2 measurements simultaneously
  • Flow times measured to 0.001s
  • Suitable for ANY polymer
  • Pre-programmed with ASTM & ISO Test Methods
  • Automatic cleaning of viscometer


· Relative Viscosity
· Inherent Viscosity
· Reduced Viscosity
· Kinematic Viscosity
· Dynamic Viscosity
· Intrinsic Viscosity
· Limiting Viscosity Number
· Molecular Weight
· K Value
· Degree of Polymerisation
……………………….and others

Test Methods
ASTM D789, ISO 307, ASTM D4603, ASTM 2857, ASTM D1795, SCAN CM15:99, TAPPI T230-OM94, ASTM D1243, USP<911> Viscosity, ISO1628

The software is updated regularly – taking into account new methods or customer specific requests. Therefore if your method is not mentioned in the above list, then please contact us.

Simple & Safe to use
Improves accuracy
Saves operator time
Reduces exposure to hazardous chemicals
Compliance with test methods 

Typical Measurement Routine
Samples are poured into the viscometer through the unique RPV Funnel Filling Station. Sample data is entered and the Start Test button pressed. After a short thermal equilibrium period, the flow time is measured automatically. Repeat flow times are automatically measured if required.

Automatic Calculations, Results Database & LIMS
Following a successful flow time measurement the RPV software performs many automatic calculations. Results are printed and/or stored in the “user configurable” results database for review at a later date. Results can also be exported automatically for use by a LIMS system.

Automatic “Safe-Vac” Cleaning
Once the measurements are complete the RPV-1 automatically cleans and dries the viscometer tube utilizing our Safe Vac System. This eliminates sample to sample carry over and increases accuracy.

Materials of construction & design
All wetted parts are PTFE or glass, which are highly chemical resistant materials. All parts and components are selected for reliability and serviceability.

Thermostatic Stirred Liquid Bath
One of the secrets to good viscosity measurements is precise temperature control during the measurement of the flow time. The RPV-1 uses a stirred liquid bath which has proven to be the most effective heat transfer medium.

Ubbelohde, Low Volume Ubbelohde or Cannon Fenske Routine viscometer
The RPV-1 standard configuration uses a Ubbelohde type capillary viscometer, manufactured from borosilicate glass to ASTM & ISO standards. The Ubbelohde design is one of the most accurate viscometers available for viscosity measurements. Viscometers are supplied with UKAS Calibration certificates, in accordance with ISO 17025. Other types of viscometer such as Cannon Fenske Routine & Low Volume Ubbelohde are also available for use with the RPV-1.

Flow time measurement & nIR detection system
Viscometers are held in a measuring stand, which has sophisticated near Infra Red sensors [nIR]. Flow times are measured accurately within 0.001 seconds. The use of n-IR sensors also allows the determination of opaque and coloured samples, such as those containing Titanium Dioxide.  The Hagenbach correction can be applied automatically.

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