Viscometers

JP Selecta viscometers measure fluid viscosity with precision traceable to international standards, a critical rheological property in quality control of paints, adhesives, cosmetics, food products, lubricants, polymers and pharmaceutical formulations. For complementary instrumental analysis in analytical chemistry, see our UV-VIS spectrophotometers.

The operating principle varies by type: rotational viscometers determine viscosity by measuring the torque required to rotate a spindle immersed in the sample at constant speed, while capillary viscometers measure the time taken for a sample volume to flow through a calibrated capillary under gravity. Rheological terminology and symbology is standardized in ISO 3219-1 on vocabulary and symbols for rotational and oscillatory rheometry, and general principles in ISO 3219-2.

The range includes digital rotational viscometers with automatic range selection and direct viscosity calculation in mPa·s, capillary viscometers calibrated per ISO 3105 on specifications and operating instructions for glass capillary kinematic viscometers, and systems for determination of kinematic and dynamic viscosity in petroleum products per ISO 3104.

Applications cover quality control of paints and varnishes, rheological characterization of cosmetics and pharmaceutical emulsions, verification of industrial lubricants by the ASTM D445 method on kinematic viscosity of transparent and opaque liquids, and pharmaceutical acceptance testing following the chapters USP <911> Viscosity Capillary Methods, USP <912> Rotational Methods and USP <913> Rolling Ball Method.

Regarding regulatory compliance, JP Selecta viscometers are designed to meet the requirements of ISO/IEC 17025 on competence of testing and calibration laboratories, with documented traceability of torque calibration and bath temperature. Our calibration service ensures international traceability with certified viscosity standards.

Manufactured in Abrera under triple certification ISO 9001:2015, ISO 14001:2015 and ISO 13485:2018, JP Selecta viscometers include a complete spindle kit, thermostatization system compatible with our thermostatic baths and initial calibration documentation. Request a quote to configure your viscometer for the viscosity range, working temperature and standards applicable to your sector.