An apparatus may include a liquid container and a sense unit mounted to the liquid container. The sense unit may include a substrate, a liquid level sensor supported by the substrate and a pressure sensor. The sense unit may further include an electrical interconnect, wherein the liquid level sensor and a pressure sensor are to each communicate through the electrical interconnect.

A gauge system and method for monitoring well pressure at temperatures in excess of 300 C. used in permanent monitoring of oil and gas wellbores. The gauge system includes an analog output transducer and a long cable which is an extruded mineral insulated multi-core cable with a seam welded corrosion resistant metal outer sheath. The transducer is enclosed in a pressure tight corrosion resistant housing and the housing is pressure sealed to the metal outer sheath. The method includes applying signal conditioning and processing to the measurements to compensate for characteristics of the transducer, the cable and the environment and thereby provide continuous monitoring of the wellbore.

A wireless pressure sensor for sensing pressure of a liquid in a tank includes a hermetically sealed housing, at least one sensor, at least one photocell array, at least one communication device, and at least one energy storage device. At least a portion of the hermetically sealed housing has a diaphragm. The at least one sensor within the hermetically sealed housing is configured to sense the pressure of the liquid. The at least one photocell array is configured to receive light and generate power from the light. The at least one communication device is configured to transmit data corresponding to the sensed pressure using wireless radio frequency signals. The at least one energy storage device is configured to store power generated by the at least one photocell array and provide power to the at least one sensor and the at least one communication device.

A pressure measurement system is provided. The system includes a pressure sensing probe extendable into a process fluid and having a pressure sensor with an electrical characteristic that varies with process fluid pressure. A mineral insulated cable has a metallic sheath with a distal end attached to the pressure sensing probe and a proximal end. The mineral insulated cable includes a plurality of conductors extending within the metallic sheath and being spaced from one another by an electrically insulative dry mineral. The proximal end of the metallic sheath is configured to be sealingly attached to a process fluid vessel.

A sensor is provided for measuring a flow of a fluid in a physiological environment, such as within a vessel of a human or animal subject. The sensor comprises an interrogation light guide extending from a proximal end to a distal end of the sensor. The interrogation light guide is configured to transmit interrogation light to, and receive reflected interrogation light from, the distal end of the sensor. The sensor further comprises an excitation light guide configured to transmit excitation light to the distal end of the sensor. The excitation light is provided for heating the fluid (directly or indirectly). The sensor further comprises a sensing element located at the distal end of the sensor. The sensing element comprises at least two etalons for reflecting interrogation light back along the interrogation light guide towards the proximal end of the sensor. Each etalon has a respective optical path length and further has at least one reflective surface external to the interrogation light guide. The sensing element is configured to be in thermal contact with the fluid such that the optical path length of at least one etalon is dependent on a temperature of the fluid. The reflected interrogation light forms an interferogram which is dependent on the optical path lengths of the respective etalons.

The present invention relates to a device for measuring aerodynamic magnitudes (1) intended to be placed transversally in a flow passage (12, 13) of a turbine engine comprising: an upstream body (2) having a profile of general cylindrical shape defining a leading edge (5) a plurality of sensors (4), the instrumentation lines (45) of the sensors being placed in the body (2), the sensitive elements (41) of the sensors extending at the leading edge (5); a downstream fairing (3) mounted on the upstream body (2) and defining a trailing edge (6); the downstream fairing (3) comprising, in the longitudinal direction of the upstream body (2), several sections (35) fixed independently of each other to the body (2), two successive sections (35) being connected by a flexible junction (37).

Examples provide an apparatus including a relative pressure sensor that includes a substrate and a cavity in a face of the substrate. The cavity has a floor in the substrate. A passage extends from the cavity. A membrane supports a pressure sensing device and is mounted to the substrate opposite the floor.

The invention relates to a sensor device particularly for maritime applications, comprising a housing (1) that has a pressure connection (7) leading to a pressure sensor (9) that transmits measurement data using a transmission device (17, 19), and at least one closeable passage opening (31) for connecting the surroundings to at least parts (33) of the housing interior in which the pressure sensor (9) is arranged, characterised in that said pressure sensor (9) is surrounded by an incompressible medium that is separated from the surroundings by an elastically-yielding, media-tight separating arrangement (49).

Provided is a method, system, and sensor device for identifying and detecting presence of a leak in a fluid conduit. The sensor device freely flows with a fluid within the fluid conduit. The sensor device includes an outer capsule that is free flowing within the fluid and provides fluid-tight containment to an interior compartment, at least one acoustic sensor mounted within the interior compartment, wherein the at least one acoustic sensor senses acoustic properties of the fluid to detect the presence of the leak, and a conductor for activating the at least one acoustic sensor to sense the acoustic properties of the fluid and the fluid conduit, wherein the conductor passes from the interior compartment and through to the outer capsule.

Provided is a method, system, and sensor device for collecting fluid data and fluid conduit data. The sensor device includes an outer capsule that is free flowing within the fluid and provides fluid-tight containment to an interior compartment, at least one sensor mounted within the interior compartment, wherein the at least one sensor senses fluid data and fluid conduit data, the sensed fluid properties being the collected fluid data, and a conductor for activating the at least one sensor to sense fluid data and fluid conduit data, wherein the conductor passes from the interior compartment and through the outer capsule.