A system for monitoring pressure within a volume defined by a wall has a housing and a manometer coupled to the housing having fluid therein. The manometer is coupled to the volume and has a fluid level corresponding to a pressure within the volume. A pressure sensor is coupled to the housing and is coupled to volume. The pressure sensor generates a pressure signal corresponding to the pressure within the volume. A controller is coupled to the pressure sensor and is programmed to compare the pressure signal to a threshold and programmed to generate an indicator based on comparing.

A method and an apparatus for detecting a defect in a sealed container are provided. The method includes: placing the sealed container in a pressure chamber; filling the chamber with a liquid that is saturated by a test gas such that the sealed container is fully submerged; subjecting the chamber to a pressurized volume of a gaseous mixture that includes the test gas, and then removing the sealed container from the chamber; performing a laser-based headspace analysis of the sealed container in order to measure a partial pressure of the test gas; and using a result thereof to determine whether the sealed container has the defect. The defect may be located on a body of the sealed container that is at or below a level of a product that is contained within the sealed container.

Disclosed are a closed loudspeaker box, a display device including the closed loudspeaker box, and a method for testing the closed loudspeaker box. The closed loudspeaker box includes: a housing; a chamber surrounded by the housing; a through hole penetrating the housing and communicating with the chamber; and a plug, at least a part of the plug is inserted into the through hole, wherein the plug includes a plug main body and a vent hole penetrating the plug main body, and the vent hole communicates the chamber and a space outside the housing.

A system and method for detecting leaks in an enclosure having a port and intended to prevent liquid material from exchanging into or out of the enclosure. A vacuum pump is coupled to the port and the enclosure is subjected to an applied vacuum pressure. Measurements of the mass and pressure within the enclosure while subject to the applied vacuum pressure are compared to expected values to detect a leak. In some embodiments, the physical arrangement of a valve of the enclosure is measured and compared to expected values to detect a leak.

The invention relates to an adapter part (9) for connecting a medical hollow body (11) to a tension/compression measuring device (3), comprising a first connecting end (13), which is designed to connect the adapter part (9) to an interior (15) of a medical hollow body (11) in a fluid-tight manner, and comprising a second connecting end (17), which has a pressure chamber (19) and is designed to operatively connect the adapter part (9) to a tension/compression measuring device (3), so that a pressure in the pressure chamber (19) can be adjusted by means of the tension/compression measuring device (3), a hollow channel (21) passing through the adapter part (9) from the pressure chamber (19) to the first connecting end (13).

A device for checking pouches adapted to contain a substance such as a liquid, a powder or a purée, includes at least one carousel adapted to convey the pouches, supporting them along its peripheral region, and at least one duct for supplying a test fluid that is connected to at least one nozzle insertable in a respective pouch conveyed by the carousel. The device further includes elements for detecting a variation in the pressure and/or flow rate of the test fluid in the supply duct after the test fluid has been supplied to, or drawn from, the pouch through the duct and the nozzle.

A transmitter-receiver arrangement for measuring concentration of gas and/or for measuring pressure in a container headspace, wherein the transmitter-receiver arrangement defines a measuring zone accommodating the headspace, and the transmitter-receiver arrangement includes a transmitter to emit electromagnetic radiation covering a wavelength range including an absorption line of gas, a receiver of electromagnetic radiation in the wavelength range, the receiver and transmitter positioned respective to each other defining a path for the electromagnetic radiation from the transmitter to the receiver, a fixating element for fixating the transmitter-receiver arrangement to the apparatus or filling machine, an electrically controllable actuator arrangement causing at least one common shift of the transmitter and receiver, a shift of the transmitter relative to the receiver, a change in spatial orientation of the transmitter and receiver relative to the fixating element, and a change in spatial orientation of the transmitter relative to a spatial orientation of the receiver.

A flexible leak testing machine for tightness testing of a cylinder head, an engine block or similar workpiece has at least one sealing plate, a machine frame with at least one workpiece holding device for the workpiece and an adjusting device with a first drive for bringing together the workpiece and the sealing plate into a test position. The leak testing machine is flexibly usable in that it includes a changeover device for sealing plates. The changeover device has an adjustable holding arrangement on the machine frame, with sealing plate holders and an associated drive for sealing plate changeover.

The present invention relates to instrumentation for underwater use powered by means of a battery and provided with a pressure sensor capable of periodically detecting pressure values inside the main body of the instrumentation.

The present invention also relates to a method for detecting possible pressure drops inside the main body of the instrumentation over time.

The instrumentation of the present invention enables carrying out efficient and inexpensive self-diagnosis of the pressure inside the body of the device, every time the battery is changed or also during manufacture of the instrument.

A leaking tank testing device, including a main body, a tubing system disposed within at least a portion of the main body to receive contents therein from a tank container, a selector rotatably disposed on an outer surface of the main body to select a vacuum testing mode in a first position, and a pressure testing mode in a second position, a vacuum monitor disposed on at least a portion of the main body to display a gradient in pressure between the contents in the tubing system and an external pressure outside of the main body in response to the selector being moved to the vacuum testing mode, and a seal disposed on at least a portion of the main body to cover at least a portion of the tubing system in response to the selector being moved to the pressure testing mode.