We disclose herein a CMOS-based flow sensor comprising a substrate comprising an etched portion; a dielectric region located on the substrate, wherein the dielectric region comprises a dielectric membrane over an area of the etched portion of the substrate; a p-n junction type device formed within the dielectric membrane, wherein the p-n junction type device is configured to operate as a temperature sensing device.

An air data probe includes a probe body and an air data sensing port disposed in the probe body. The probe body includes a barrel region, a tapered head region extending forward from the barrel region, and a tip at a forward-most end of the tapered head region. The air data sensing port is disposed in the probe body at a port location aft of the tip. The probe body has a turbulence-producing geometry originating at the tip that produces a turbulent boundary layer of airflow that extends from the tip to the port location.

An air data probe includes a probe body and an air data sensing port disposed in the probe body. The probe body includes a barrel region, a tapered head region extending forward from the barrel region, and a tip at a forward-most end of the tapered head region. The air data sensing port is disposed in the probe body at a port location aft of the tip. The probe body has a turbulence-producing geometry originating at the tip that produces a turbulent boundary layer of airflow that extends from the tip to the port location.

A fuel assembly inspection system that utilizes a pressure transducer mounted to a utility's spent fuel handling tool to detect a relative change in depth of a fuel assembly during fuel inspections. The system then wirelessly transmits the signal to a fuel inspection recording system, which converts the signal to a relative height along the fuel assembly being viewed by a camera, and displays the relative height along with the applicable fuel assembly feature being viewed by the camera (e.g., nozzle, grid, span) via a text overlay on the video image of the inspection.

A semiconductor pressure sensor for measuring an external pressure exerted on the sensor, including: a membrane; a first resistor connected between a first bias node and a first output node; a second resistor connected between the first bias node and a second output node; a first and second current source connected to the first resp. second output node for generating a differential voltage signal indicative of the external pressure to be measured. The resistors including piezo-resistive strips arranged in particular crystallographic directions. The circuit may have a third and four resistor pair for compensating package stress. The Piezo-resistive strips may be formed as p-doped regions within an n-well, the biasing node being electrically connected to the n-well.

A semiconductor pressure sensor for measuring an external pressure exerted on the sensor, including: a membrane; a first resistor connected between a first bias node and a first output node; a second resistor connected between the first bias node and a second output node; a first and second current source connected to the first resp. second output node for generating a differential voltage signal indicative of the external pressure to be measured. The resistors including piezo-resistive strips arranged in particular crystallographic directions. The circuit may have a third and four resistor pair for compensating package stress. The Piezo-resistive strips may be formed as p-doped regions within an n-well, the biasing node being electrically connected to the n-well.

A method for reading pressure may include reading, by a first device, an acceleration of a pressure sensor, wherein the pressure sensor is encapsulated in a medium, and wherein the acceleration alters a reading of the pressure sensor and reading, by a second device, a pressure reading from the pressure sensor. If an output criteria is met, an adjusted pressure reading is produced. A system for reading pressure includes a first device coupled to the pressure sensor and configured to read an acceleration of the pressure sensor. A second device may be configured to read a pressure from the pressure sensor wherein, if an output criteria is met, to adjust the measured pressure of the pressure sensor, based on the measured acceleration, to produce an adjusted pressure reading. An output device is configured to receive an output of the second device and to output an output pressure reading.

Methods and extracorporeal blood treatment systems reposition a diaphragm of a pressure measurement apparatus (e.g., a pressure pod apparatus of an extracorporeal blood set) by, for example, controlling an air pump apparatus to move the diaphragm toward a target measuring position based on a calculated target air volume (e.g., wherein the calculated target air volume is representative of the air volume necessary to move the diaphragm to the target measuring position based at least on a monitored air pressure). For example, after the diaphragm is bottomed out or topped out, as air is added to or removed from the transducer side cavity of a pressure pod apparatus, the target air volume may be iteratively calculated until it is determined that the diaphragm is repositioned in the target measuring position.

Methods and extracorporeal blood treatment systems reposition a diaphragm of a pressure measurement apparatus (e.g., a pressure pod apparatus of an extracorporeal blood set) by, for example, controlling an air pump apparatus to move the diaphragm toward a target measuring position based on a calculated target air volume (e.g., wherein the calculated target air volume is representative of the air volume necessary to move the diaphragm to the target measuring position based at least on a monitored air pressure). For example, after the diaphragm is bottomed out or topped out, as air is added to or removed from the transducer side cavity of a pressure pod apparatus, the target air volume may be iteratively calculated until it is determined that the diaphragm is repositioned in the target measuring position.

Methods of compensating for undesired influences in a pressure transmitter wherein the pressure transmitter comprises a body for housing a low-pressure sensor and a high-pressure sensor each of which is in fluid communication with a port and in further fluid communication with each other through a connector tube containing a fill fluid. Various embodiments of the compensation process use one of the high-pressure and the low-pressure sensor as a common reference, compensating for changes in calibration, such as changes in the effective areas or spring rates of the non-reference sensor.