Anton Paar GmbH | Date: 2016-07-29
A method and a measuring device determine the density of liquids. The measuring device has a flexural resonator, at least one sensor for at least one environmental parameter that influences a measurement to be performed and a condition monitoring unit. The measured values from the respective sensor are fed to the condition monitoring unit. The condition monitoring unit has a memory unit with stored forecasts for environmental parameters to be expected in the course of the measurement, and that, by using the condition monitoring unit, on the basis of the stored forecasts and the initial measured values selected for the measurement, it is determined whether the planned measurement can be carried out under the selected trial conditions without any impairment or with a permissible impairment by the forecast changes in the environmental parameters.
Anton Paar GmbH | Date: 2016-08-18
A fixing device selectively fixes a measuring probe of a scanning probe microscope. The fixing device comprises an inserting unit in which the measuring probe is insertable and a master force unit for selectively exerting a master force onto a fixing mechanism. The fixing mechanism is actuatable without a tool. The fixing mechanism is enabled or disabled to controllably detach or fix the measuring probe when the measuring probe is inserted in the inserting unit.
Anton Paar GmbH | Date: 2016-03-11
A rotational rheometer for measuring powdery or granular materials has a measuring container for receiving the product to be measured and a cover for the measuring container. A measuring body is held by a measuring shaft. The measuring body and the container are rotatable relative to one another. The measuring shaft is guided through the cover with low friction, or without contact altogether. An evaluation unit is arranged outside the measurement container to evaluate the measured values received by the measuring shaft. To seal the bearing gap or the passage of the measuring shaft in or through the cover in the measuring container, both a fluid seal with a sealing fluid inlet and at least a geometric seal cooperating with the fluid seal are provided as a powder barrier.
Anton Paar GmbH | Date: 2015-04-09
A deflecting prism for electromagnetic radiation, in particular for refractometer- and/or ATR-measurements, is part of a measuring configuration. The deflecting prism has a body produced in one piece from a mono-crystal. The body has at least two beam conductive surfaces on a side of the body opposite each other or circumferentially about the body and a measuring surface lying between the beam conductive surfaces or surrounded by the latter. The body further has at least one beam entry surface or a beam exit surface. Accordingly, the measuring surface lies on an elevation formed on the body, which crosses over via a ledge surrounding the elevation into the remaining part of the body. On the remaining part, the beam conductive surfaces and/or the beam entry surface or exit surface lie.
Anton Paar GmbH | Date: 2015-05-13
A device determines information indicative for a zeta potential at the interface between a solid phase and a liquid phase. The device includes a pressure vessel, in which the liquid phase can be accommodated and a measuring cell, downstream of the pressure vessel and such that it can be brought into fluid communication with the pressure vessel and in which the solid phase can be accommodated. A storage vessel is downstream of and in fluid communication with the measuring cell. A pressure loading apparatus, loads the pressure vessel with a pressure profile with a temporally continuous pressure change so a liquid phase can be conveyed out of the pressure vessel through the measuring cell into the storage vessel. A detection apparatus detects the information indicative for the zeta potential at the measuring cell during the loading of the pressure vessel with the pressure profile.
Anton Paar GmbH | Date: 2015-03-25
An optical measuring system measures polarization optical properties of a sample. The system includes (a) a light source that emits measuring light along an optical axis of an analysis beam path, (b) a polarization state generator, arranged downstream with respect to the light source in the analysis beam path which provides light with a defined polarization state, (c) a sample holder, arranged downstream with respect to the polarization state generator in the analysis beam path which accommodates the sample, (d) a polarization state analyzer, arranged downstream with respect to the sample holder in the analysis beam path which measures the polarization state of the measuring light after passing through the sample, and (e) a mechanical support structure, at which at least the polarization state generator, the sample holder and the polarization state analyzer are directly attached. Also described is a method for producing such an optical measuring system.
Anton Paar GmbH | Date: 2015-04-01
There is described a microwave heating system, comprising a bowl, a dome adapted to be fit to the bowl, such that a volume is formed by the bowl and dome, and a rotor device adapted to support at least one reaction vessel and being rotatably supported by the bowl, the rotor device comprising a base plate comprising at least one through-hole, and at least one tubular member having a longitudinal axis and being adapted to receive a reaction vessel and to be coupled to the base plate in such a way that the longitudinal axis of the at least one tubular member passes through the at least one through-hole, wherein the base plate and the at least one tubular member comprise metal, and wherein the bowl is adapted to be connected to a microwave source, such that a microwave field can be supplied to the volume, whereby the microwave field is attenuated in a region between the rotor device and the dome compared to a region between the bowl and the rotor device.
Anton Paar GmbH | Date: 2016-05-20
A measuring instrument for studying fluid samples contains a flexural vibrator. A vibrator tube of which is fixed at at least one clamping position and forms on one side of the clamping position, in particular a carrier unit, a freely projecting vibrator section and on the other side a fluid feed tube section with a feed opening and a fluid discharge tube section with a fluid discharge opening. Accordingly, the vibrator tube is fixed or retained both at its fluid discharge tube section and at its fluid feed tube section with at least one independent holding device provided in addition to the clamping position.
Anton Paar GmbH | Date: 2016-05-17
A rotary rheometer has two measurement parts which delimit a measurement gap and can be moved relative to one another in a predetermined movement direction by an adjustment device. At least one switching unit is provided, which responds to changes in a force flow in a force circuit of the rotary rheometer delimited by the measurement parts and has switching contacts for the activation of an adjustment device, which stops the adjustment device when a predetermined limit force value is exceeded for the force flow in the positive or negative direction, optionally without relative movement of the measurement parts, or with the measurement parts remaining in the same position.
Anton Paar GmbH | Date: 2016-05-25
A dynamic light scattering apparatus (10) comprises a source (1) for irradiating a sample (5) with primary electromagnetic radiation (2), a detector (7) for detecting secondary electromagnetic radiation (6) generated by scattering the primary electromagnetic radiation (2) at the sample (5), a refraction index determination unit (20) comprising a movable optical element (4) and configured to determine information indicative of a refraction index of the sample (5) based on measurements of the secondary electromagnetic radiation for a plurality of different positions of the movable optical element, and a particle size determining unit (22) configured to determine information indicative of particle size of particles in the sample (5) by analyzing the detected secondary electromagnetic radiation (6) and taking into account the refraction index determined by the refraction index determination unit.