Waters Technologies Corporation

Other

Ta Instruments-Waters LLC

Waters Corporation

Rubotherm Gmbh

Cornelia Will

Joseph D Michienzi

Dieter Bathen

Frieder Dreisbach

Sornanathan Meyyappan

Tatjana Hayn

Jürgen Helmut Neumann

Described is a thermogravimetric analyzer system. The system includes an evaporator having first and second fluidic channels and a thermally controlled heater assembly. The first fluidic channel has a first channel inlet in fluidic communication with a gas supply module, a first channel outlet and an end portion extending from the first channel outlet. The second fluidic channel has a second channel inlet in fluidic communication with a source of liquid and a second channel outlet disposed on the first fluidic channel at a merge location between the first channel inlet and the first channel outlet. The end portion of the first fluidic channel includes a bend to redirect a flow within the first fluidic channel and improve a mixing of the gas and liquid received by the first and second fluidic channels, respectively.

Evaporator for a thermogravimetric analyzer

Described is a convection reducer. The convection reducer may be used in a thermogravimetric analysis apparatus to reduce convection in fluid surrounding a sample container. The convection reducer includes multiple baffle plates and at least one spine member. Each baffle plate has an edge with at least one slot and each spine member has multiple slots. Each slot in a baffle plate is received in a corresponding slot of the at least one spine member so that the baffle plates are arranged substantially parallel to each other along the at least one spine member. The reduction in convection results in undesired forces on the apparatus that may disturb the sample weight measurement.

Thermogravimetric analysis components

The aim of the invention is to provide a commercially usable and inexpensive device and method with which a sorption enthalpy can be measured in a simple manner. This is achieved by a device for calorimetrically measuring sorption processes, comprising a sorption cell for receiving a sample, the sorption cell having a volume for filling with a sorption gas, and comprising a reference cell likewise for filing with the sorption gas. A measurement gas volume is arranged around the sorption cell for receiving a reference gas, and the reference cell is surrounded by a reference gas volume, which is likewise provided for receiving the reference gas. A gas connection is provided between the sorption cell and the reference cell in order to conduct sorption gas into the sorption cell and the reference cell such that a sorption reaction occurs with the sample in the sorption cell. Furthermore, a device is provided for measuring pressure differences between the measurement gas volume and the reference gas volume in order to carry out a calorimetric measurement of the sorption process on the sample in the sorption cell on the basis of a volume change of the reference gas in the measurement gas volume.

Device and method for calorimetrically measuring sorption processes

A magnetic bearing assembly () comprises a first magnet assembly () for generating a first quadrupole magnetic field in a first plane and a second magnet assembly () for generating a second quadrupole magnetic field in a second plane. The second plane is arranged parallel to the first plane. The quadrupole magnetic fields exhibit in each case in the planes magnetic field axes arranged at an angle to one another between four poles. A longitudinal axis (A) is defined at right angles hereto by the centres of the quadrupole magnetic fields. At least one diamagnetic element () is arranged on the longitudinal axis (A). The first and second magnet assemblies () are arranged relative to one another in such a way that the first and the second quadrupole magnetic fields are rotated towards one another about the longitudinal axis (A) by an angular amount which is not a whole-number multiple of 90&#xb0;. Such a bearing arrangement can be used in particular in a magnetic levitation assembly () with a lifting assembly ().

Bearing, in particular for a magnetic levitation assembly

A magnetic bearing assembly () comprises a first magnet assembly () for generating a first quadrupole magnetic field in a first plane and a second magnet assembly () for generating a second quadrupole magnetic field in a second plane. The second plane is arranged parallel to the first plane. The quadrupole magnetic fields exhibit in each case in the planes magnetic field axes arranged at an angle to one another between four poles. A longitudinal axis (A) is defined at right angles hereto by the centers of the quadrupole magnetic fields. At least one diamagnetic element () is arranged on the longitudinal axis (A). The first and second magnet assemblies () are arranged relative to one another in such a way that the first and the second quadrupole magnetic fields are rotated towards one another about the longitudinal axis (A) by an angular amount which is not a whole-number multiple of 90&#xb0;. Such a bearing arrangement can be used in particular in a magnetic levitation assembly () with a lifting assembly ().

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Bochum, Germany

Cornelia Will