A capillary viscometer is disclosed for measuring the relative viscosity of a solute in a solvent. The capillary viscometer consists of a single fluid flow circuit having a measuring capillary and a thermal flow sensor connected in series for in-situ velocity measurement. Relative viscosity is determined by measuring the flow velocity ratio of pure solvent compared to that of a sample. Two different differential viscometers are also disclosed. The first differential viscometer has two fluid flow circuits with one of the circuits also having a large volume vessel to allow for sample dilution. Another configuration of the differential viscometer is disclosed where four fluid flow circuits are configured in a Wheatstone bridge configuration.

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.

Systems and methods for determining fluid rheological characteristics of a fluid used in a subsurface operation are provided. The methods include measuring temperature, pressure, and at least one of a flow rate and a flow velocity of the fluid in a first fluid circuit. A model is based on the temperature, the pressures, and the flow rate or flow velocity. The fluid rheological characteristic of the fluid in a second fluid circuit is determined by measuring a temperature and flow rate and/or flow velocity in the second fluid circuit. The rheological characteristic of the fluid is calculated based on the model employing the temperature and the flow rate/flow velocity of the second fluid circuit.

A method for screening a large design space of compositions with possible application as binders in cermet and powder metallurgy applications allows rapid elimination of large portions of the design space from contention so that resource intensive procedures, such as computationally intensive modeling techniques and experimental testing, can be focused on potential binder compositions with a high likelihood of being used successfully. The method relies on parameters such as surface tension, contact angle, viscosity, a special capillary metric that is used to characterize capillary behavior, and melting point, which are relatively easy to calculate or determine, to screen out large portions of the design space. Exemplary binder compositions are obtained using the method.

A method and system for sensing and controlling temperature with magnetic fields are provided. The method comprises placing a compound in thermal communication with a number of temperature or heat sources and placing a number of magnets in thermal communication with the compound. A number of magnetic sensors are placed in electromagnetic communication with the number of magnets. Changes in the magnetic field of the magnets are detected by the sensors and used to determine the temperature of the compound according to a model that maps magnetic field characteristics to temperature. The amount of cure of the compound can then be estimated from the temperature. The temperature or heat sources are controlled in response to the temperature measurement and the estimated amount of cure of the compound.

A system includes a flow tube configured to receive a flow measured by an ultrasonic flow measurement, wherein a center region of the flow tube is configured to have a drop in pressure. The system also includes a heat source/hot wire and temperature sensors configured to enable a flow measured by a thermal massflow measurement. In the system, a controller is configured to compare the flow measured by the ultrasonic flow measurement to the flow measured by the thermal massflow measurement. The controller determines a ratio of the flow measured by an ultrasonic flow measurement to the flow measured on by the flow measurement based on thermal massflow. The controller also calculates a density, a thermal conductivity and an energy and/or gas content of the gas.

The method for monitoring the condition of the hydraulic system for predicting the risk of failure is designed for hydraulic systems, whose components include at least one pump (1) for transporting fluid through the distribution system of the hydraulic system. The hydraulic system simultaneously detects at least one current magnitude of pressure and the current value of speed of the pump (1), whereupon the current speed value is compared with the trend speed value obtained from the statistically processed archived data of speed from the previous operation of the pump (1) and/or with the reference speed value of the pump (1), whereupon the comparison result provides the condition and risk of failure of the hydraulic system.

Rheometer systems and related methods are provided. In accordance with an example, a rheometer system includes a rheometer and a platform supporting the rheometer and movable between a lowered position and a raised position. The rheometer system includes a fluid receptacle defining an opening. The rheometer system includes a receptacle housing having a housing side and adapted to receive the fluid receptacle. The opening of the fluid receptacle facing the rheometer when the fluid receptacle is received by the receptacle housing. The rheometer system includes a thermoelectric device coupled adjacent to the housing side. The rheometer system includes a controller in communication with the thermoelectric device and adapted to control a temperature of the thermoelectric device.

Lubricity of a sample of lubricant may be determined by precisely measuring temperature from friction generated between two or more moving parts in contact under force. For example, to carry this out, a rotatable pin and vee block test apparatus set forth in ASTM D2760-95 (Reapproved 2010) can be provided, and modified to provide its rotating pin with a hole longitudinally along an axis of the pin about which the pin rotates during testing. The hole is configured to receive, and for the testing receives, a thermocouple to measure temperature during the testing.

A method for measuring the oil content of a lithium battery separator by using DSC includes the following steps: taking 5-10 mg of an oil-containing separator sample from the lithium battery separator, and taking 5-10 mg of an oil-free separator sample from an oil-free separator; performing an enthalpy test on the oil-free separator sample at room temperature by using a differential scanning calorimeter to obtain a first enthalpy value, and performing an enthalpy test on the oil-containing separator sample by using the differential scanning calorimeter to obtain a second enthalpy value; subtracting the second enthalpy value from the first enthalpy value to obtain a difference, and then dividing the difference by the first enthalpy value to obtain the oil content of the oil-containing separator sample.