Four positions Pulp viscometer PSL-Rheotek

Four positions Pulp viscometer PSL-Rheotek

RPV-1 (4) Pulp

RPV-1 (4) Pulp Request Quotation

The PSL Rheotek RPV-1 (4) four position Pulp and Cellulose viscometer system is suitable for measuring a wide range of pulp and cellulose products including bleached wood (paper pulp), bleached chemical pulp, digester samples, cotton linters, regenerated cellulose, aged electrical papers and pharmaceutical bulking materials.
RPV-1 Pulp & Cellulose viscometer systems are configured with a unique nitrogen purge system in order to ensure that samples are protected from oxidation during both the sample preparation and viscosity test.

The RPV-1 Pulp Viscometer is designed to be integrated with the iSP-2 Pulp Sample Preparation system for pulp & cellulose.

Other options include Pulp stirring block and RSS Rheotek Smart Sampler.

Part No. RPV-1 (4) Pulp



Product Description


The PSL Rheotek RPV-1 Pulp & Cellulose viscometer system automatically measures the viscosity of a solution of pulp, paper or cellulose dissolved in cupriethylenediamine (also known as CED or Cuene).
The RPV-1 Pulp & Cellulose viscometer 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 agitation 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 including relative viscosity, intrinsic viscosity (Limiting Viscosity Number), degree of polymerization (DP), K value, kinematic viscosity (mm²/s) and dynamic viscosity (mPa.s).

PSL Viscometer tube types: AKV Ubbelohde or AKV Cannon Fenske Routine

Test Methods Pulp and Cellulose:
SCAN-CM 15:99 Viscosity in Cupriethylenediamine Solution
ISO 5351 Determination of limiting Viscosity Number in Cupriethylenediamine (CED) Solution
ASTM D1795 Standard Test Method for Intrinsic Viscosity of Cellulose
TAPPI T 230 Viscosity of Pulp (capillary viscometer method)
PACTAC G.24P Cupriethylenediamine Viscosity of Pulp
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


Typical applications and configurations 
Test Method Solvent Concentration Temperature RPV-1 Pulp measuring positions
ISO 5351 CED solution 0.2-0.5% 25°C 2 to 4
ASTM D1795 CED solution 0.1-1% 25°C 1 to 4
T230 CED solution 0,5% 25°C 1 to 4
G.24P CED solution 0,5% 25°C 1 to 4

Part No. Ordering information
RPV-1 (4) Pulp
PSL Rheotek Polymer Viscometer – four positions complete with viscometer bath, chiller, control module, nitrogen purge system, two measuring heads, two filling stations, PC control system and PIAB vacuum system.


Part No. Other options
RPVS011 RPV start up kit including glass vials (144 pcs), plastic caps (500 pcs) and copper strips (10 pcs)
SIL-OIL Silicone bath oil
MIN-OIL Mineral bath oil
STATPACK RPV StatsPack extraction of results to PC or LIMS
 F100/A/CAL-4  Digital Thermometer with one probe and calibration