A system is described for reliably detecting leaks in a distributed manner in intermittent use pipelines by making use of thermal or acoustic events triggered by the leak. The system can work in pressurized or unpressurized pipelines and in high flow or no flow conditions.

An apparatus for detecting acoustic signals in housing is disclosed. The housing may be housing of a wellbore, riser, tubular or pipeline or the like for transporting fluids or housing of a vessel for storing fluids. The apparatus comprises a longitudinally extending tube having an internal surface and an external surface, a longitudinally extending fiber optic cable disposed within the tube, and one or more than one longitudinally extending outer fins radially extending outwards from and coupled with the external surface of the tube. The outer fin is configured to project towards the housing and allows fluid between the external surface of the tube and the housing when the apparatus is positioned in the housing. The apparatus may alternatively comprise a longitudinally extending fiber optic cable coated with a coating and one or more than one longitudinally extending outer fin radially extending outwards from and coupled with the coated fiber optic cable.

A multiple layer composite material having fluid breach detection features provides indication of a failure in a fluid barrier. The indication of breach of fluid is provided before failure of a final layer of the composite material. The multiple layer composite material includes more than one fluid impermeable layer with an intermediate layer sealed between the fluid impermeable layers. Failure of one of the fluid impermeable layers is detected by fluid contact in the intermediate layer. The intermediate layer includes a reagent and/or detection device to indicate that the fluid has reached the intermediate layer.

A leakage detection system configured to detect hydrocarbon leakage from an underwater pipeline in a body of water having a sensor configured to acquire signals related to the temperature of a liquid inside a chamber that is not watertight and which, in use, is full of water and extends along a portion of underwater pipeline susceptible to leakage, and a control unit, which is connected to the sensor and is configured to control if the temperature of the liquid in the chamber is within an expected range and emit a leakage signal when the temperature of the liquid in the chamber is outside the expected range.

The invention relates to a device for detecting a leak in a sealed enclosure, comprising an organic light-emitting diode intended to be placed inside the enclosure; and a device for measuring a value representative of at least one of the following parameters: a) the luminous efficacy of the diode; and b) the impedance of the diode.

A multiple layer composite material having fluid breach detection features provides indication of a failure in a fluid barrier. The indication of breach of fluid is provided before failure of a final layer of the composite material. The multiple layer composite material includes more than one fluid impermeable layer with an intermediate layer sealed between the fluid impermeable layers. Failure of one of the fluid impermeable layers is detected by fluid contact in the intermediate layer. The intermediate layer includes a reagent and/or detection device to indicate that the fluid has reached the intermediate layer.

A method of manufacturing a semiconductor device includes moving a nozzle from a standby location to a dispensing location, wherein the nozzle is connected to a liquid supply pipe and is configured to dispense a processing liquid to a surface of a substrate, and an end portion of the liquid supply pipe adjoined to the nozzle is covered with a pipe casing. The method further includes illuminating the end portion of the liquid supply pipe prior to dispensing of the processing liquid. The method further includes determining whether the liquid supply pipe is leaking based on an intensity of refracted from the end portion of the liquid supply pipe.

A hose leakage detection system includes a ring configured to be disposed within a hose. The ring has a lateral slot formed in an outer surface, defining a first slot wall and a second slot wall. A sensor is disposed on one of the first slot wall and the second slot wall and a power source is electrically connected to the leakage detection system.

An optical liquid detection system for detecting liquid intrusion and/or liquid leakage inside a battery pack of an electrical vehicle includes: at least one optical refractive index sensor that includes a polymer optical fiber cable that includes an optical input, an optical output and at least one optical sensing region; an optical transmitter providing an optical signal at the optical input of the polymer optical fiber cable; and an optical receiver for receiving the response of the optical signal at the optical output of the polymer optical fiber cable. The at least one optical refractive index sensor outputs a response of the optical signal at the optical output of the polymer optical fiber cable based on a refraction index of a fluid covering at least partly the at least one optical sensing region. The response is indicative of a liquid intrusion and/or liquid leakage inside the battery pack

A fluid detection system includes a wicking material to draw fluid away from a first location with space limitations and proximate to a fluid device or a fluid interface. The wicking material draws the fluid to a remote fluid indicator at a second location. Contact between fluid and the remote fluid indicator produces a detectable alteration to the remote fluid indicator, and a non-contact optical sensor detects the alteration.