Waters Investments Limited

University of Delaware

Peter Foster

Nigel Doe

Norman Joseph Wagner

Matthew Liberatore

An optical rheometer system includes a rheometer chamber that can retain a fluid sample to be measured. A light source is provided that creates a light beam incident on the fluid sample. A Peltier heating plate is provided that has a channel region located within the plate. The channel region is configured to substantially transmit a light beam emitted from the light source and incident on the Peltier heating plate. In one embodiment, a rotating optical plate is provided opposed to a first surface of the Peltier plate. The rotating optical plate is substantially transparent such that light from a light beam emerging from the channel region of the Peltier plate can pass through the optical plate and be recorded at a detector. Peltier elements in the Peltier heating plate are arranged to provide uniform heating of sample fluid located on the first surface of the Peltier heating plate. The Peltier elements are further arranged to permit light to pass through the channel substantially unattenuated.

System for in-situ optical measurement and sample heating during rheometric measurements

A rotary rheometer having a an upper heating/cooling assembly and a lower heating/cooling assembly located opposite one another opposite a sample gap. The lower heating/cooling assembly may comprise a Peltier heater and the upper heating/cooling assembly preferably comprises a heating element that mates with a heat spreader for heating and cooling the area above the sample and providing more uniform heating and cooling across the sample gap while also minimizing any chimney effect within the rheometer and/or providing heating/cooling capability that is insensitive to changes in the gap between an upper geometry and the lower heating/cooling assembly. The upper heating/cooling assembly may further comprise a cooling channel for cooling the upper heating/cooling assembly.

Heat spreader for rotary rheometer

A rotary rheometer having a magnetic thrust bearing. The thrust disk of the magnetic thrust bearing being situated between a pair of magnetic actuator assemblies and extending beyond the circumference of the actuator assemblies so as to encompass the magnetic flux lines generated by the actuator assemblies, thus minimizing likelihood of an undesirable preferential position or side load.

Rotary rheometer magnetic bearing

A system and method for automatic identification of a detachable component of an instrument is disclosed. The detachable component includes a machine-readable device that contains information associated with the detachable component. The machine-readable device can be a bar code, a variable depth pattern, a magnetic stripe, or the like. The information contained within the machine-readable device can include one or more of serial number, type, material, dimensions, and calibration data of the detachable component. The instrument includes a reader that is configured to obtain the information from the machine-readable device.

System and method for automatic identification of a detachable component of an instrument

A rotary rheometer having a concentric cylinder control jacket and a sample cup. The sample cup fits snugly inside the control jacket, such that the sample cup is in substantial thermal contact with the control jacket along at least the greater part of the length of the sample cup. A heating/cooling assembly such as a Peltier plate, positioned, for example, beneath the control jacket, is used to heat and/or cool the control jacket, thus heating and cooling the sample cup. The sample cup includes a generally annular chamber, which ensures that the sample experiences a uniform temperature. The rheometer reaches steady-state sample temperature more quickly, and the steady-state temperature reached is closer to the actual desired sample temperature than with prior art rheometers, due to the much greater thermal contact between the sample cup and the control jacket.

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Lingfield, United Kingdom

Peter Foster