Abstract:
A system for separating a sample and collecting the separated sample. The system includes an ultracentrifuge having a cylindrical rotor. The system includes a gradient delivery assembly for delivering a gradient solution to the ultracentrifuge rotor, and a sample delivery assembly for delivering the solution containing the sample to the ultracentrifuge rotor, he system includes a fraction collection assembly for collecting discrete volumes of the separated sample. The system includes a processor for controlling operation of the ultracentrifuge, as well as the gradient delivery assembly, the sample delivery assembly, and/or the fraction collection assembly.
Abstract:
A mass flow metering system (1) according to the invention comprises a metered vessel (2) for receiving a flow of froth via a conduit (11). The metered vessel (2) is suspended from mass measuring means in the form of load cells (8, 9) and (10) within a second outer vessel (14). The metered vessel (2) has discharge opening (13) for discharging the froth from the vessel, and a discharge control valve (3) associated with the opening for controlling the discharge of froth from the metered vessel. The metered vessel (2) has a level sensor (5), located in the metered vessel at a predetermined level and associated with the valve (3) for opening the valve when the predetermined froth level is reached. In use, the system operates periodically and in cycles, which alternates between a measuring cycle and a cleaning cycle. There is further provided a method of measuring the mass flow of continuous flowing slurry in line.
Abstract:
The invention relates to a fluid reservoir with level measurement comprising a base body (10) and a channel (12), which is configured in the base body and which is provided with an inlet (14) and an outlet (16), whereby the dimensions of the channel cross-section are selected in such a manner that a fluid (18) that can fill the channel forms a fluid meniscus (20) which separates a section (12b) of the channel filled with fluid from an unfilled section (12a) of the channel in which no fluid is present. The position of the meniscus with regard to the channel is essentially independent from the orientation of the fluid reservoir. The fluid reservoir additionally comprises a detection device (32, 22, 24) for detecting the position of the fluid meniscus or of the channel in order obtain, from the position of the fluid meniscus, the level and/or a change in the level of the fluid reservoir. The inventive fluid reservoir is especially well-suited, in conjunction with a capacitive level detection, as an economical medicament reservoir.
Abstract:
In the production of clean steam, a certain amount of water is removed from the process as a reject stream. To maintain product steam quality, the ratio of the reject stream to the product stream must be above a given threshold value. Measurement of the reject stream by conventional methods is difficult. According to the invention, a shutoff valve is provided in the reject line with two level sensors fitted at higher, separate levels. As the valve opens at the signal from the upper level sensor and closes at the signal from the lower sensor, and the volume corresponding to the tubing between the level sensors is known, the reject flow can be measured. A method and a device providing for measurement according to the invention are disclosed.
Abstract:
A volumetric bath dosing device for lightweight, pourable material, in particular expanded perlite, has a measurement container with an upper material inlet from the storage silo, a lower closable material outlet into the mixer and a measurement probe which closes the upper material inlet when the desired filling height of material is reached. The measurement container consists of two telescopic parts which are vertically adjustable in a reproducible manner. An upper closing device is provided above or below the maximum filling height and the lower part of the measurement container is joined to the mixer in a flexible manner.
Abstract:
Apparatus for measuring the dose of flowable material, preferably liquid, being dispensed comprises a reservoir pot (7) supplied with liquid via feed line (19) and having the surface level of the liquid sensed by two liquid level detectors (27) and (31) which define upper and lower limits of the level of liquid in the pot (7) at the start and finish of a given sequence of dosing operations. A dosing gun (1) is operated to dispense the material (29) by way of a supply line (5) and the number of dispensing doses is counted in order to enable the average dose magnitude to be determined by dividing (i) the quantity defined between the upper and lower liquid levels in the pot (7) by (ii) the counted number of cycles of the gun (1) for dispensing the material (29). The material (29) may for example be liquid compound for lining can ends. A load cell may be used to weigh the reservoir pot and contents, for establishing the magnitude of the batch of dispensed liquid by weight.
Abstract:
A process is disclosed for filling containers with a certain volume of liquid. When an inlet valve (6) is opened, the liquid flows into a volumetric dosing chamber (23), and when an upper switching level (50) is reached the inlet valve (6) is closed. When the outlet valve (7) is opened the liquid flows out of the dosing chamber into a container (1) and when a lower switching level (50) is reached the outlet valve (7) is closed. The top filling level (HO) actually reached after the inlet valve is closed and the bottom filling level (HU) actually reached after the outlet valve is closed are measured. The upper and lower switching levels are corrected by the thus measured values, so that the desired volume of liquid may be accurately respected independently from pressure and flow conditions.
Abstract:
Procédé et dispositif de conditionnement sous atmosphère protectrice d'une boisson (20) stockée dans un réservoir (11) et transportée par un circuit (17) comportant un filtre (13), un organe de sectionnement (16) en aval du filtre, un orifice de sortie (21) par lequel la boisson s'écoule dans un conteneur (19), dans lequel; on équipe le circuit d'un réservoir tampon fermé (14), raccordé entre le filtre et l'organe de sectionnement, et disposé au dessus de l'organe de sectionnement; on maintient la hauteur (23) de la colonne de boisson à une valeur sensiblement constante; et on établit, dans le réservoir tampon, un ciel gazeux inerte (25) maintenu à une pression sensiblement égale à la pression ambiante, de sorte que la boisson puisse s'écouler selon un débit d'écoulement gravitaire sensiblement constant qui ne soit pas influencé par un colmatage du filtre.
Abstract:
A fluid dispensing apparatus is configured to dispense a predetermined volume of fluid, and includes a fluid reservoir to hold a fluid to be dispensed, a dispense tube to dispense the fluid, and an elevator mechanism. The fluid reservoir receives a fluid from a fluid supply. A dispense tube has a dispense outlet, and is connected to an outlet port on the fluid reservoir. The elevator mechanism changes a relative vertical displacement between the dispense outlet and the outlet port. Particularly, a processor controls the elevator mechanism to raise the dispense tube to a raised filling position to prevent fluid flow from the dispense outlet, and lower the dispense tube to a lowered dispensing position to dispense the fluid.
Abstract:
Methods and apparatus for supplying a liquid and controlling its level inside of a container, in particular, the liquid inside of the container may be a liquid material suitable for use in a chemical vapor deposition process, such the liquid is controlled and supplied in a manner which minimizes the introduction of impurities.