Poulten Selfe & Lee Limited, operating under the brand name PSL Rheotek, specializes in manufacturing automated polymer viscometer systems for solvent-based viscosity measurement. With a focus on glass capillary viscosity, they offer a range of products including glass viscometers, viscometer baths, and custom solutions. Their core services involve developing automated viscometer systems, glassblowing high precision viscometer tubes, and calibrating viscosity reference standards. Poulten Selfe & Lee serves a global clientele in industries such as recyclers, compounders, petrochemical, pulp mills, and pharmaceutical manufacturers, providing them with the right configuration of instrumentation for continuous viscosity testing.