Methods and apparatuses for determining the swell of a subterranean formation sample when contacted with a fluid at subterranean conditions.

Powder flow conveying from a powder feeder to a process (i.e. thermal spray gun) can have instabilities that can be detected and diagnosed using the hose back pressure. Incorporating a pressure transducer in the powder hose line at the connection of the powder line to the feeder allows the back pressure to be measured in real time at a high sample rate to detect instability and aid in diagnosing the cause of the instability. Diagnosis includes identifying periodic oscillations in the hose such as acoustics as well as detecting hose clogging and hose rupture conditions. Once detected proper corrective actions can be recommended to correct the cause of the instability.

A method and a measuring apparatus for determining specific quantities for the gas quality in which the gas or gas mixture flows through an ultrasonic flow sensor as well as through a microthermal sensor, and the former is used for determining the sound and flow velocity and the latter for determining the thermal conductivity and the thermal capacity of the gas or gas mixture. The sound velocity, the thermal conductivity and the thermal capacity are subsequently used for the correlation of the specific quantities for the gas quality.

A method and a measuring apparatus for determining specific quantities for the gas quality in which the gas or gas mixture flows through an ultrasonic flow sensor as well as through a microthermal sensor, and the former is used for determining the sound and flow velocity and the latter for determining the thermal conductivity and the thermal capacity of the gas or gas mixture. The sound velocity, the thermal conductivity and the thermal capacity are subsequently used for the correlation of the specific quantities for the gas quality.

Methods and apparatus for reduction of non-linearity errors in automotive pressure sensors. A pressure sensor includes a pressure sensing element including a pair of parallel electrodes, a pair of ceramic plates, rigid glass seals and a connection between the pair of parallel electrodes and an integrated circuit (IC). The IC executes a linear mapping function of a 1/C.sub.X value after a C.sub.X value is captured from the pressure sensing element, C representing a capacitance, the linear mapping function reducing a non-linearity error to enable two point calibration of a relationship between pressure and capacitance.

A pressure indicator for a hydraulic hammer is provided. The pressure indicator includes a sleeve member configured to couple to an opening defined in a wall housing of an accumulator of the hydraulic hammer. The pressure indicator further includes a plunger slidably disposed within the sleeve member and movable between a first position and a second position with respect to the sleeve member. The plunger includes a first end disposed outside the wall housing of the accumulator. The plunger further includes a flange coupled to a second end. The pressure indicator further includes an elastic member inserted over the plunger and disposed between the wall housing of the accumulator and the flange. A position of the first end of the plunger with reference to an outer end of the sleeve member provides a visual indication of the pressure of the gas within the accumulator.

A pressure indicator for a hydraulic hammer is provided. The pressure indicator includes a sleeve member configured to couple to an opening defined in a wall housing of an accumulator of the hydraulic hammer. The pressure indicator further includes a plunger slidably disposed within the sleeve member and movable between a first position and a second position with respect to the sleeve member. The plunger includes a first end disposed outside the wall housing of the accumulator. The plunger further includes a flange coupled to a second end. The pressure indicator further includes an elastic member inserted over the plunger and disposed between the wall housing of the accumulator and the flange. A position of the first end of the plunger with reference to an outer end of the sleeve member provides a visual indication of the pressure of the gas within the accumulator.

An air source device includes: a tank; a compressor; an intake valve; and an ECU configured to acquire an intake amount, which is an amount of air sucked from an outside and supplied to the tank by the compressor, based on an increasing amount of a tank pressure, which is a pressure of the air accommodated in the tank, the increasing amount being an increasing amount from a time point when the intake valve is estimated to be changed from a closed state to an opened state.

An air source device includes: a tank; a compressor; an intake valve; and an ECU configured to acquire an intake amount, which is an amount of air sucked from an outside and supplied to the tank by the compressor, based on an increasing amount of a tank pressure, which is a pressure of the air accommodated in the tank, the increasing amount being an increasing amount from a time point when the intake valve is estimated to be changed from a closed state to an opened state.

An apparatus for providing a liquid polymer component with a predefined air content, in particular for producing a plastic foam, includes a pressure vessel receiving the liquid polymer component through an opening, a pipeline at the bottom of the pressure vessel having a multiplicity of air outlet nozzles, a motor-operated stirring device, a circulation line, a pump between the inflow and outflow, and an outlet valve between the pump and the outflow. An oxygen sensor in the circulation line measures an actual value of the oxygen saturation of the air-charged polymer component, and an electronic control device modifies the pressure and/or amount of the compressed air supplied to the air outlet nozzles based on the actual value of the oxygen saturation measured by the oxygen sensor, such that the oxygen saturation of the liquid polymer component circulated in the circulation line assumes a predefined setpoint value.