Rheoceptor™ Overview

 Dielectric
    Analyzers

 Viscometers

 Rheometers

 Company
    Information
 

To deliver materials with acceptable performance, viscosity needs to be carefully controlled. To control viscosity, it must be measured. Although viscosity can and should periodically measured in the lab, it's preferable to continuously measure viscosity in-line. Real-time monitoring allows better understanding and control of processes, and helps improve yields and profits. It also gives you 100% inspection and reporting of product quality.

Previously there were problems with in-line viscometers for polymer melts. They were maintenance intensive, subject to shifts in calibration, or both.

Now there's a stable, affordable in-line viscometer.

Announcing the new Rheoceptor™ family of process viscometers...
CEP is pleased to announce that it is has received an exclusive license to manufacture and sell a family of process viscometers that DuPont developed for its own internal use.

Dr. Safwat Tadros, who is now with GE Plastics, invented the instrument, previously called the "wedge rheometer", and Dr. McBrearty of CEP worked extensively on developing and commercializing several versions of it during his years at DuPont.

The viscometers work by measuring the lift pressures associated with squeezing flows. These pressures are similar to the lubrication pressures that help our automobile crankshafts avoid rubbing against the journal bearings. The viscometers come in two major types - cam types and disk types.

The cam type viscometers have a cam rotating inside a cylindrical, fluid filled cavity with a pressure transducer flush-mounted on the inside wall. The cavities may be located inside gear pumps or extruders, with the cams keyed to the rotating shafts of the machines. Each time the cam lobe passes the pressure transducer, a pressure pulse is recorded. The amplitude of the pulse is proportional to the viscosity of the liquid, consistent with lubrication theory. The shear rate of the measurement is an adjustable parameter given by the ratio of the tangetial speed of the cam divided by the average gap between the cam and the wall.

Rheoceptor™ viscometers are available in four configurations:

Rheoceptor In-line Gear Pump Viscometer

Rheoceptor In-line Extruder Viscometer

Rheoceptor Side Stream Gear Pump

Rheoceptor Disk Viscometer

Just call us and discuss your application. If it sounds promising, we'll help you install a Rheoceptor™ squeezing flow viscometer. We'll also help you calibrate the instrument, verify it and use it for real-time monitoring.