A method is provided for monitoring a flow behavior of mixed components without requiring additional instrumentation or sampling. The method is carried out by determining ratios of the power required to rotate a mixing impeller at different rotational speeds and then comparing the ratios. Characteristics about the mixed components are determined based on differences between the ratios.

A viscometer includes a viscosity sensor with a liquid flow channel for measuring a viscosity of a liquid flowing through the liquid flow channel, a manifold with an inlet and an outlet for receiving a liquid sample through the inlet of the manifold and providing the received liquid sample through the outlet of the manifold to the viscosity sensor, and a pump coupled with the manifold for causing an in-flow of the liquid sample into the manifold through the inlet of the manifold and an out-flow of the received liquid sample from the manifold through the outlet of the manifold. Also disclosed is a viscosity sensor module with two or more viscosity sensors.

This disclosure relates to cold cranking simulator viscosity (CCSV) boosting base stocks that allow flexibility for engine oil formulations to meet both high and low temperature viscosity requirements while maximizing fuel efficiency. The CCSV-boosting base stocks can include C28-C60 hydrocarbon materials, linear esters, tertiary amides, dialkyl carbonates, aromatic alcohols, and aromatic ethers. This disclosure also relates to lubricating oil formulations containing the CCSV-boosting base stocks, and a method for determining the CCSV-boosting efficacy of a base stock.

A magnetic-inductive flow meter includes: a measuring tube for conducting a flowable medium, the measuring tube having a wall; at least three measuring electrodes arranged in the wall to form a galvanic contact with the flowing medium; a magnetic field-generating device for generating a magnetic field that passes through the medium; a measuring circuit designed to ascertain at least one first measurement variable, wherein measured values of the first measurement variable are ascertained at a first measuring electrode pair; and an analysis circuit designed to ascertain a Reynolds number and/or a kinematic viscosity value of the medium in the measuring tube using measured values for the first measurement variable and a second measurement variable, which differs from the first measurement variable, the measured values of the second measurement variable being ascertained at a second measuring electrode pair.

A method for evaluating signals of a sensor unit including at least two sensors. The method includes reading in a first sensor value of a first of the sensors and a second sensor value of a second sensor, the first and second sensor value each representing one parameter of a substance to be measured by the sensors or a linking of the parameters. A threshold value range is read in, which maps a range of combinations of at least the first and second sensor values, which represents the presence or a value of the substance to be measured in surroundings of the first and second sensors. A combination of the read-in first and second sensor values is recognized as being outside the threshold value range. The threshold value range is changed into a changed threshold value range so that the combination is situated within the changed threshold value range.

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.

Improved rheometry is provided using an autonomous swimming robot that can be driven at least in an angular velocity mode and in a torque mode. The resulting improved capability can enable measurement of multiple rheological parameters, such as both normal stress components .sub.1 and .sub.2, by observing motion of the robot in the fluid. The robot is preferably rotationally symmetric. but with a fore-aft head-tail asymmetry that enables propulsion in complex fluids when the head and tail are driven to rotate opposite each other about the rotational axis of symmetry.

Process for evaluating the mechanical performance of a filler gel, comprising the step consisting in subjecting a sample of this gel to oscillating mechanical stresses making it possible to determine the elastic modulus G and to deliver a score representative of the integration of G over the stress and/or the deformation strain within a stress and/or strain interval that includes values of the modulus G encountered beyond the linear viscoelasticity plateau.

A viscosity measuring method includes: immersing a plunger into a sample contained in a cylindrical container by an initial depth L.sub.0; further immersing the plunger at a velocity v.sub.p1 by a distance L.sub.1, and measuring a force applied to the plunger; obtaining first peak value F.sub.T1 and a first convergent value F.sub.Te1 of the force; returning the plunger to the initial depth L.sub.0; further immersing the plunger at a velocity v.sub.p2 by a distance L.sub.2, and measuring a force applied to the plunger; obtaining a second peak value F.sub.T2 and a second convergent value F.sub.Te2 of the force; obtaining a flow behavior index n; and calculating an apparent viscosity .sub.a of the sample based on Expression (1).

The present disclosure relates to systems and methods for determining a fluid characteristic of a fluid flowing within a flow region.