The system and method for wireless water leak detection provides for manual prevention of external action, such as an external alarm and/or valve shut-off, if a leak sensor can be reached by a respondent within a pre-set time threshold. Upon detection of a leak by a leak sensor, a local alarm, such as an audible alarm or the like, is initiated. Additionally, at the time of detection, a first time is recorded. A first alarm signal is transmitted from the leak sensor to a base station. The first alarm signal includes data representative of the recorded first time. If manual input is not received by the leak sensor within a pre-set time threshold measured from the first time, then the base station transmits a second alarm signal to at least one external device, and may further wirelessly transmit a shut-off signal to a valve controller for closing an associated valve.

A detector unit for use in an aspirating detection system. The detector unit includes an aspirator for drawing air along at least one sampling pipe and into the detector unit; a sensor chamber for analysing a sample of the air drawn into the detector unit; a Venturi conduit through which the air is moved by the aspirator, the Venturi conduit including a first portion of the Venturi conduit and a second portion of the Venturi conduit, a cross-sectional area of the first portion being smaller than a cross-sectional area of the second portion; a pressure sensor configured to detect a differential pressure between the air in the first portion and the air in the second portion of the Venturi conduit; and a controller configured to determine a leak and/or a blockage in the aspirating detection system based on the detected differential pressure.

A system for water-flow monitoring comprising at least one micrometer, a gateway and a server, wherein the micrometer comprising: a housing, an inner tubular member, a rotating member, a sensing module, a transmission module, a power unit, a memory, and a processor, and wherein the tubular member is located inside the housing, and have an in and out connecting means and wherein the connecting means is connected to a distributing conduit on one side and associated with a water-flow outlet on the other side, and wherein the rotating member is designed to rotate upon the flow of water through said tubular member, and the sensing module is sensing the amount of water flow through the micrometer to said water-flow outlet, with accordance to the rotation of said rotating member, and wherein the micrometer is designed to have a hibernation mode, said hibernation mode starts according to a predefined condition and is terminated upon the sensing of water flow.

A method of testing the structural integrity of a rigid container comprises performing a sampling process on the rigid container comprising sampling a volume of sample gas from a sampling region associated with the rigid container, wherein the method further comprises performing a detection process comprising producing one or more laser beams for excitation of one or more materials that may be in the volume of sample gas, wherein the one or more materials are representative of a gas and/or vapour and/or a liquid leak from the rigid container and detecting light that has passed through the volume of sample gas, and determining the presence and/or absence and/or amount of said one or more materials in the volume of sample gas based on detected light.

Disclosed herein is a method of determining the nature of a fault in a radiotherapy device comprising a linear accelerator. The radiotherapy device is configured to provide therapeutic radiation to a patient. The radiotherapy device comprises a vacuum tube comprising an electron gun, a waveguide configured to accelerate electrons emitted by the electron gun toward a target to produce said radiation, and a flight tube. The electron gun is located at a first end of the vacuum tube and the flight tube is located at a second end of the vacuum tube. The radiotherapy device further comprises a first and a second sensor. The first sensor is configured to provide signals indicative of pressure at a first region inside the vacuum tube and the second sensor is configured to provide signals indicative of pressure at a second region inside the vacuum tube. The first region is closer to the first end of the vacuum tube than the second region is. The method comprises processing a first value derived from signals from the first sensor and a second value derived from signals from the second sensor. The first value is indicative of pressure at the first region inside the vacuum tube, and the second value is indicative of pressure at the second region inside the vacuum tube. Processing the first and second value comprises comparing the first value with a first threshold and comparing the second value with a second threshold; and, based on the processing of the signals, determining that the nature of the fault is associated with the flight tube.

Methods, systems, and apparatuses are provided for detecting and determining conditions of and conditions within a fluid conduit.

Valves, internal combustion engines including such valves, and methods of on-board diagnostic leak detection for a crankcase ventilation system using such valves are disclosed. Each valve has a housing defining a first port and a second port in fluid communication with one another and defining a valve seat therebetween. A biasing member biases a poppet sealing member into a normally open position (defining unrestricted flow through the valve) and a commanded actuator is connected to the poppet sealing member. The poppet sealing member has an orifice therethrough defining a restricted flow path, and, upon command, the commanded actuator moves the poppet sealing member from the open position to a restricted flow position in which the poppet sealing member is seated against the valve seat for restricted flow thorough the orifice in the poppet sealing member.

Systems, devices, and methods for leak testing surgical conduit grafts or valved conduits such as aortic-valved conduits with a pressurized gas such as air. Air is non-destructive and especially useful for leak testing conduits that have coatings or sealants that may be functionally impacted when exposed to fluids such as water or saline. Open ends of the conduit are clamped and sealed, and a pressurized gas introduced into an inner lumen thereof. A change in mass flow rate is measured to quantify the leakage. One end of a tubular conduit may be clamped to a fixed manifold, and the opposite end to a manifold slidably mounted to accommodate any conduit elongation when pressurized. The clamping and sealing structure may be pneumatic and/or mechanical, and complementary contoured clamp members may be used to seal a scalloped external sealing ring of an aortic conduit.

An inspection device includes an output unit, a storage unit, and an inspection unit. The output unit outputs a control signal for controlling a water supply valve to control supply and no supply of irrigation water from a water supply pipe in an open farm field, between an open state and a closed state. The storage unit stores water pressures of irrigation water as detected in a period from a state where the water supply valve becomes in the open state and irrigation water is supplied from the water supply pipe until an expected time elapses after the water supply valve becomes in the closed state and the water supply pipe is expected to be filled with irrigation water. The inspection unit calculates a time constant of water pressure based on the water pressures and inspects the water supply pipe based on the time constant.

An inspection device includes an output unit, a storage unit, and an inspection unit. The output unit outputs a control signal for controlling a water supply valve to control supply and no supply of irrigation water from a water supply pipe in an open farm field, between an open state and a closed state. The storage unit stores water pressures of irrigation water as detected in a period from a state where the water supply valve becomes in the open state and irrigation water is supplied from the water supply pipe until an expected time elapses after the water supply valve becomes in the closed state and the water supply pipe is expected to be filled with irrigation water. The inspection unit calculates a time constant of water pressure based on the water pressures and inspects the water supply pipe based on the time constant.