Viscometers and Viscometry methods are disclosed. In one general aspect a capillary bridge viscometer comprises an input port an output port a first capillary tubing arm in a first hydraulic path between the input port and a first differential detection point, a second capillary tubing arm in a second hydraulic path between the first differential detection point and the output port, a third capillary tubing arm in a third hydraulic path between the input port and a second differential detection point, a fourth capillary tubing arm in a fourth hydraulic path between the second differential detection point and the output port, an adjustable mechanical flow restrictor in one of the first, second, third, and fourth hydraulic paths, wherein the adjustable mechanical flow restrictor is operative to mechanically adjust a resistance to flow of a fluid while the fluid flows through the adjustable mechanical flow restrictor.

Thermal conductivity measurements of a wellbore fluid may be used to derive the sag of the wellbore fluid (i.e., the inhomogeneity or gradation in particle distribution in the fluid as a result of the particles settling). For example, a method may include measuring a thermal conductivity of a fluid at two or more locations along a height of a vessel containing the fluid that comprises particles dispersed in a base fluid; and calculating a sag of the fluid based on the thermal conductivity at the two or more locations. In some instances, the temperature and pressure of the wellbore fluid may be changed and/or the wellbore fluid may be sheared to investigate their effects on sag.

A viscosity measuring apparatus is mounted on a vehicle provided with an engine, a cylinder pressure sensor configured to detect cylinder pressure which is inner pressure of a cylinder of the engine, a fuel injection valve configured to supply fuel to the engine, and a temperature sensor configured to detect temperature of a coolant of the engine. The viscosity measuring apparatus is provided with: an estimating device configured to calculate a cooling loss from a heating value of the cylinder based on the cylinder pressure detected by the cylinder pressure sensor and an input heating value of the cylinder, and to estimate viscosity of the coolant on the basis of the calculated cooling loss.

A thermal flow sensor comprising at least one first element (2) suspended with respect to a support, said first suspended element (2) being of an electrically conductive material, first means (6) for biasing said suspended element (2) and first means (8) for measuring the variation of the electric voltage at the terminals of the suspended element (2), said first suspended element (2) being formed by a nanowire and said first biasing means (6) are formed by an alternating current source the intensity of which provides heating of the first suspended element (2) by Joule effect.

A system includes a fluid conduit, a fluid chamber in communication with the fluid conduit, a rheology sensor in communication with the fluid chamber, and an electric temperature controller in communication with the fluid chamber. The fluid chamber is cooled in response to a first control signal from the electric temperature controller.

With increasing demands for cost reductions, profitability, tighter construction deadlines and potential liabilities construction companies, raw material suppliers, infrastructure owners, etc. are seeking cost effective systems, method and processes relating to the quality control of said construction materials. Accordingly processes, systems and methods are disclosed relating to concrete and other construction materials such as automatic slump measurement, automatic load measurement, artificial intelligencemachine learning optimization of material mixes, and automatic ingestion of data from unstructured documents to provide data to artificial intelligencemachine learning processes.

A system includes a fluid conduit, a fluid chamber in communication with the fluid conduit, a rheology sensor in communication with the fluid chamber, and an electric temperature controller in communication with the fluid chamber. The fluid chamber is cooled in response to a first control signal from the electric temperature controller.

An analytical device includes a fluid compartment configured to accommodate a solvent, a blocking device configured to close an input and/or an output of the fluid compartment, a flow sensor and/or a pressure sensor coupled to the fluid compartment and configured to perform a measurement with respect to the solvent, a temperature change device coupled to the fluid channel and configured to perform a temperature change with respect to the fluid compartment, and a determination device, configured to determine a thermal property of the solvent based on the measurement and the temperature change.

An apparatus for measuring properties of a thermosetting polymer includes a body having a first chamber and a second chamber each filled with the thermosetting polymer material. A first FBG sensor is disposed in the polymer material within the first chamber and a second FBG sensor is disposed in the polymer material within the second chamber. A first dielectric constant sensor is in the first chamber, and a second dielectric constant sensor is in the second chamber. A computing device is configured to measure properties of the thermosetting polymer based on wavelength data measured using the first FBG sensor and the second FBG sensor, and a loss coefficient of the polymer material measured using the first dielectric constant sensor and the second dielectric constant sensor, while the thermosetting polymer solidifies in the first chamber and the second chamber.

Provided herein is a surface acoustic wave resonator-based viscosimeter with capable of measuring viscosity and temperature of fluids at high temperatures. The viscosimeter utilizes interdigitated electrodes of a heat-resistant conductive metal disposed on a piezoelectric material. The resonance frequency and quality factor of the resonator vary with temperature and viscosity of the surrounding fluid, allowing both to be derived from measured resonator characteristics. The viscosimeter is capable of measuring and monitoring viscosity at temperature in the range from 500 C. to 900 C. and higher.