The disclosure is directed to a pressure sensor of an implantable medical device. The pressure sensor may utilize detect fluid pressure based on a changing capacitance between two capacitive elements. The pressure sensor may define at least a portion of a fluid enclosure of the IMD. In one example, the pressure sensor has a self-aligning housing shape that occludes an opening in the pump bulkhead of the IMD. An operative surface of the pressure and the portion of the fluid enclosure may be formed of a corrosion resistant and/or biocompatible material. A first capacitive element of the pressure sensor may be a metal alloy diaphragm that deflects in response to external fluid pressure. A second capacitive element of the pressure sensor may be a metal coating on a rigid insulator sealed from the fluid by the diaphragm and a housing of the sensor.

In an example, this document discloses an apparatus for insertion into a body lumen, the apparatus comprising an optical fiber pressure sensor. The optical fiber pressure sensor comprises an optical fiber configured to transmit an optical sensing signal, a temperature compensated Fiber Bragg Grating (FBG) interferometer in optical communication with the optical fiber, the FBG interferometer configured to receive a pressure and modulate, in response to the received pressure, the optical sensing signal, and a sensor membrane in physical communication with the FBG interferometer, the membrane configured to transmit the received pressure to the FBG interferometer.

In one implementation, an electronic device includes: a display; a sensor configured to measure information to be used for determining whether the electronic device is underwater; and at least one processor configured to determine, based on results of the measurement by the sensor, whether the electronic device has fallen into the water. Upon determining that the electronic device has fallen into the water, the at least one processor displays maintenance operation information for guiding a user to maintenance operations for the electronic device on the display. The electronic device is capable of, when the electronic device has fallen into the water, guiding a user so as to prompt the user to perform self-maintenance on the electronic device so that a breakdown or the like of the electronic device due to moisture left in the electronic device can be prevented.

A sensor system for sensing pressure of a first fluid (e.g. a liquid and/or gas) comprises an optical sensing fiber that is configured for sensing pressure, and at least one sensor housing embedding the optical sensing fiber. The sensor housing is filled with a second fluid. The sensor housing comprises a non-hermetic pressure transfer medium comprised in the sensor system and positioned in the sensor housing such that a pressure of the first fluid can be transferred via the pressure transfer medium onto the second fluid towards the optical sensing fiber for determining based thereon a pressure of the first fluid.

The invention relates to a sensor unit (100) for an implant system for medical support of a patient, wherein the sensor unit (100) comprises a carrier material (110) in which a recess (120) is formed and, furthermore, the sensor unit (100) comprises a semiconductor component (130) for forming a sensor, wherein the semiconductor component (130) is arranged in the recess (120) and, lastly, the sensor unit (100) comprises a substrate layer (140), which covers at least partially the recess (120) and/or comprises an opening (150) on at least one side of the sensor unit (110), as well as a diffusion barrier, by means of which at least the semiconductor component (130) is at least partially covered or coated in order to ensure a medium access (150) to the sensor.

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.

A system that monitors toilets for leaks using in-toilet monitors with pressure sensors that are placed underwater in toilet tanks. Monitors can be dropped into tanks without additional wiring or installation; they may be battery powered and may transmit data wirelessly. Data may be analyzed by a server that detects leaks or other malfunctions. Pressure data may be filtered to remove the effect of barometric pressure, to measure the height of water in the tank. The system may learn the flush pressure change pattern for each toilet; pressure changes that do not match this pattern may indicate problems such as leaks. Data may indicate the type of leak, such as an open flapper or a leaking valve. Toilet monitors may measure temperature, and the system may generate alerts when freezing appears imminent. The system may keep flush counts for each toilet to support maintenance and water consumption measurement.

A diaphragm pressure gauge includes: a structure disposed under pressure to be measured; two diaphragms attached to the structure so as to oppose each other; and a detection element that is fixed to the two diaphragms to detect displacements of the two diaphragms. In each of the two diaphragms, when one of two surfaces is designated an opposing surface and the other surface is designated a non-opposing surface, the structure and the two diaphragms set a space faced by one of the opposing surface and the non-opposing surface as an airtight space to be kept in a reference vacuum, and the other of the opposing surface and the non-opposing surface is subjected to the pressure to be measured.

In an example, this document discloses an apparatus for insertion into a body lumen, the apparatus comprising an optical fiber pressure sensor. The optical fiber pressure sensor comprises an optical fiber configured to transmit an optical sensing signal, a temperature compensated Fiber Bragg Grating (FBG) interferometer in optical communication with the optical fiber, the FBG interferometer configured to receive a pressure and modulate, in response to the received pressure, the optical sensing signal, and a sensor membrane in physical communication with the FBG interferometer, the membrane configured to transmit the received pressure to the FBG interferometer.

An example method for installing optical sensors for a fuel level measurement system includes mounting a plurality of fittings through a wall of a fuel tank, positioning a plurality of optical sensors within the plurality of fittings and a respective optical sensor includes a first pressure sensing end inserted through the fitting and internally into the fuel tank and a second end extending externally from the fuel tank, and mounting an optical fiber bundle external to the fuel tank. The optical fiber bundle has an optical fiber connected to each of the plurality of optical sensors for guiding light to each of the plurality of optical sensors.