A leak detecting device for a fluid filled vessel including a housing, a solid shaft, an anchoring attachment, and a resilient member. The housing has a continuous perimeter edge sized to extend around an underwater surface, forms a hollow interior, and includes a first aperture formed through a wall of the housing and a second aperture formed through the wall of the housing. The solid shaft extends through the first aperture of the housing and has a first end on an interior side of the housing and a second end on an exterior side of the housing. The anchoring attachment is secured to the first end of the solid shaft. The resilient member is secured to the perimeter edge of the housing.

A leak detecting device for a fluid filled vessel including a housing, a solid shaft, an anchoring attachment, and a resilient member. The housing has a continuous perimeter edge sized to extend around an underwater surface, forms a hollow interior, and includes a first aperture formed through a wall of the housing and a second aperture formed through the wall of the housing. The solid shaft extends through the first aperture of the housing and has a first end on an interior side of the housing and a second end on an exterior side of the housing. The anchoring attachment is secured to the first end of the solid shaft. The resilient member is secured to the perimeter edge of the housing.

The invention relates to a film chamber for receiving a test object to be tested for the presence of a leak, including at least two film layers and at least two frame elements, each of which has a sealing surface so that the two frame elements lie against each other in a gas-tight manner in order to hermetically seal the film chamber. Each of the two film layers has at least one retaining profile in a wall region, and each of the two frame elements has at least one retaining groove in the frame element sealing surface in order to receive a retaining profile such that the two film layers are held between the two frame elements substantially by a formfitting connection.

The invention relates to a film chamber for receiving a test object to be tested for the presence of a leak, including at least two film layers and at least two frame elements, each of which has a sealing surface so that the two frame elements lie against each other in a gas-tight manner in order to hermetically seal the film chamber. Each of the two film layers has at least one retaining profile in a wall region, and each of the two frame elements has at least one retaining groove in the frame element sealing surface in order to receive a retaining profile such that the two film layers are held between the two frame elements substantially by a formfitting connection.

The glass panel unit includes: a first glass panel; a second glass panel; a seal; an evacuated space; and a gas adsorbent. The seal with a frame shape hermetically bonds the first glass panel and the second glass panel to each other. The gas adsorbent is placed in the evacuated space. The gas adsorbent includes a getter. The gas adsorbent is visible through at least one of the first glass panel and the second glass panel. The gas adsorbent has properties of changing its color when adsorbing gas.

The glass panel unit includes: a first glass panel; a second glass panel; a seal; an evacuated space; and a gas adsorbent. The seal with a frame shape hermetically bonds the first glass panel and the second glass panel to each other. The gas adsorbent is placed in the evacuated space. The gas adsorbent includes a getter. The gas adsorbent is visible through at least one of the first glass panel and the second glass panel. The gas adsorbent has properties of changing its color when adsorbing gas.

A method for analyzing a fluid that flows from a chamber, in particular a combustion chamber, of an internal combustion engine into a fluid guide. The internal combustion engine includes at least one element, in particular an injector, for the supply of fuel. The analysis takes place with the aid of a sensor, in particular a lambda sensor, on which the fluid in the fluid guide acts. The analysis takes place during cranking of the internal combustion engine, and the fluid acting on the sensor is not influenced by fuel that is supplied in a controlled manner.

The invention relates to a method for detection of a leak from a tank for liquid gas, said tank comprising a membrane surrounding the liquid gas, the membrane being surrounded by an insulation space which separates the membrane from a wall, the insulation space being filled an inert gas which is injected and extracted by at least one duct. The detection method comprises the following steps: determining 921 a first variation of mass of inert gas ΔM1 between two moments by measuring the gas added and removed by the duct; calculating 922 a second variation of mass of inert gas ΔM2 corresponding to a difference between two masses of inert gas measured in the insulation space; and comparing 931 the first variation with the second variation, and triggering an alarm if a difference E1 between the first variation and the second variation of mass of inert gas is greater than a first threshold S1.

The invention relates to a method for detection of a leak from a tank for liquid gas, said tank comprising a membrane surrounding the liquid gas, the membrane being surrounded by an insulation space which separates the membrane from a wall, the insulation space being filled an inert gas which is injected and extracted by at least one duct. The detection method comprises the following steps: determining 921 a first variation of mass of inert gas ΔM1 between two moments by measuring the gas added and removed by the duct; calculating 922 a second variation of mass of inert gas ΔM2 corresponding to a difference between two masses of inert gas measured in the insulation space; and comparing 931 the first variation with the second variation, and triggering an alarm if a difference E1 between the first variation and the second variation of mass of inert gas is greater than a first threshold S1.

The disclosed embodiments describe a method, apparatus, and system for water management. At least one smart aquameter may be used to connect to a plumbed water system. The smart aquameter may measure a variety of sensor data, process, analyze, store, report, or control information related to the water system. The acoustic, pressure, and temperature characteristics of water in a plumbed system, amongst other things, may be used to identify which outlet is using water, for how long, and how much. This information, along with other relevant information, may be utilized to report, alert, optimize, inform, educate, and regulate the water system, for consumers, utility companies, and resource agencies.