A measuring device for measuring flow velocity includes a measuring tube, a measuring transducer for registering a measured variable and outputting a first measured value representing the measured variable, a temperature sensor, and an electronic measuring/operating circuit. The temperature sensor has a sensor element and electrically conductive leads. Each lead is connected with the sensor element and has a first section following on the connection location. The sensor element has a maximum periphery. The first section has a separation of less than 5% of a measuring tube radius from a measuring tube wall, wherein a length of each lead in the first section is at least 25% of the maximum periphery. The leads are guided in their first section at least in certain regions along the maximum periphery, and in their first section are in certain regions in thermal contact with the measuring tube.

Various embodiments are generally directed to techniques for monitoring chromatographic fluid flows, such as the flow to and/or from one or more reservoirs used in chromatographic operations, for instance. In many embodiments, the chromatographic operations may include one or more of High Performance Liquid Chromatography (HPLC), Ultra Performance Liquid Chromatography (UPLC), Ultra Performance Convergence Chromatography (UPC2), and the like. Several embodiments are particularly directed to a chromatographic fluid flow device (CFFD) for monitoring a change in density of a chromatographic fluid in a tube, such as by detecting the presence or absence of gas in the tube with an ultrasonic bubble detector. In various embodiments, the chromatographic fluid may include a solvent, a sample, or waste associated with a chromatographic operation.

Various embodiments are generally directed to techniques for monitoring chromatographic fluid flows, such as the flow to and/or from one or more reservoirs used in chromatographic operations, for instance. In many embodiments, the chromatographic operations may include one or more of High Performance Liquid Chromatography (HPLC), Ultra Performance Liquid Chromatography (UPLC), Ultra Performance Convergence Chromatography (UPC2), and the like. Several embodiments are particularly directed to a chromatographic fluid flow device (CFFD) for monitoring a change in density of a chromatographic fluid in a tube, such as by detecting the presence or absence of gas in the tube with an ultrasonic bubble detector. In various embodiments, the chromatographic fluid may include a solvent, a sample, or waste associated with a chromatographic operation.

The invention provides a method, and apparatus, for determining the degree of separation (DOS) of a polymer solution into a polymer-rich stream and a solvent-rich stream, said method comprising the following: adding to a liquid-liquid separation vessel the polymer solution, which comprises a polymer, a solvent and an anti-solvent; separating the polymer solution into a polymer-rich stream and a solvent-rich stream; removing at least some the polymer-rich stream from at least one outlet P on the vessel, and measuring the actual solution density of this polymer-rich stream using at least one flow meter; removing at least some of the solvent-rich stream from at least one other outlet S on the vessel, and measuring the actual density of the solvent-rich stream using at least one flow meter; and wherein the degree of separation (DOS) is determined by the following equation (Eqn. 1):
DOS=[actual solution density (polymer-rich steam)−actual solution density (solvent-rich stream)]/[theoretical solution density (polymer-rich stream)−theoretical solution density (solvent-rich stream)]  (Eqn. 1).

The invention provides a method, and apparatus, for determining the degree of separation (DOS) of a polymer solution into a polymer-rich stream and a solvent-rich stream, said method comprising the following: adding to a liquid-liquid separation vessel the polymer solution, which comprises a polymer, a solvent and an anti-solvent; separating the polymer solution into a polymer-rich stream and a solvent-rich stream; removing at least some the polymer-rich stream from at least one outlet P on the vessel, and measuring the actual solution density of this polymer-rich stream using at least one flow meter; removing at least some of the solvent-rich stream from at least one other outlet S on the vessel, and measuring the actual density of the solvent-rich stream using at least one flow meter; and wherein the degree of separation (DOS) is determined by the following equation (Eqn. 1):
DOS=[actual solution density (polymer-rich steam)−actual solution density (solvent-rich stream)]/[theoretical solution density (polymer-rich stream)−theoretical solution density (solvent-rich stream)]  (Eqn. 1).

The disclosure provides a measurement set-up for a return cement suspension, a construction site arrangement with a measurement set-up, and a method which can be carried out inexpensively, reliably, and easily.

The disclosure provides a measurement set-up for a return cement suspension, a construction site arrangement with a measurement set-up, and a method which can be carried out inexpensively, reliably, and easily.

A mass flow controller assembly includes a housing defining a cavity, a plurality of internal passages, a first inlet, a first outlet, a second inlet, and a second outlet. A valve is connected to the housing, has an inlet fluidly coupled to the second outlet of the housing and an outlet fluidly coupled to the second inlet of the housing. The valve is configured to control fluid flow from the second outlet of the housing to the second inlet of the housing. A microelectromechanical (MEMS) Coriolis flow sensor is arranged in the cavity, includes an inlet fluidly coupled by at least one of the plurality of internal passages to the first inlet of the housing and is configured to measure at least one of a mass flow rate and density of fluid flowing through the MEMS Coriolis flow sensor. An outlet of the MEMS Coriolis flow sensor is fluidly coupled by at least one of the plurality of internal passages to the second outlet of the housing. The second inlet of the housing is fluidly coupled by at least one of the plurality of internal passages to the first outlet of the housing.

A mass flow controller assembly includes a housing defining a cavity, a plurality of internal passages, a first inlet, a first outlet, a second inlet, and a second outlet. A valve is connected to the housing, has an inlet fluidly coupled to the second outlet of the housing and an outlet fluidly coupled to the second inlet of the housing. The valve is configured to control fluid flow from the second outlet of the housing to the second inlet of the housing. A microelectromechanical (MEMS) Coriolis flow sensor is arranged in the cavity, includes an inlet fluidly coupled by at least one of the plurality of internal passages to the first inlet of the housing and is configured to measure at least one of a mass flow rate and density of fluid flowing through the MEMS Coriolis flow sensor. An outlet of the MEMS Coriolis flow sensor is fluidly coupled by at least one of the plurality of internal passages to the second outlet of the housing. The second inlet of the housing is fluidly coupled by at least one of the plurality of internal passages to the first outlet of the housing.

A dual core flooding apparatus and process are disclosed that provide for testing of two core plugs using different orientations and multiple fluids. The dual core flooding apparatus includes at least two core holders each configured to contain a core plug. The dual core flooding apparatus includes a fluids delivery system configured to inject one or more fluids into the core holders and core plugs. The dual core flooding apparatus includes an image capture system, a density and viscosity measurement system, and at least two oil/water separators. The dual core flooding apparatus also includes at least two back pressure regulators and an automated confining pressure system. A dual core flooding process may include introducing at least one fluid into the core holders, maintaining confining pressure and back pressure, and measuring density and viscosity of existing fluids.