An open-cell foam biological indicator for bacteria detection and removal from water or air, and methods of use.

According to the present disclosure, at least two fluid inlet/outlet pipes, each of which is provided with a filter, are installed outside a structure to be bent and an end of each of the fluid inlet/outlet pipes is connected to a pressure sensor provided on the structure. Thus, since a fluid in the state in which low-frequency and high-frequency components of the disturbances generated outside the structure are removed therefrom acts on the pressure sensor, the underwater pressure sensing apparatus is capable of measuring fluid pressure in a stable state.

The present invention describes a sampling system and densitometer system for sampling fluids from a pipeline. A flow loop is set up which continuously collects fluid from the pipeline and then returns the fluid with a minimum fluid flow rate so that the fluid is representative of fluid flowing through the pipeline at the time of sampling. For each sample, pressurized fluid is taken from the flow loop and directed to a pressurized sampling chamber. The sample is then directed by gravity to a removable sample container, which may be pressurized or unpressurized, in each sampling cycle.

A method of particle detection in an aspirated particle detection system having a sampling pipe network and a particle detector. The method includes drawing sample air to the particle detector through the air sampling network; analyzing the sample air with the particle detector; entering an amplification phase, in the event that a concentration of particles in the sample air greater than a predetermined threshold is detected, to create a plurality of sample air packets in the sampling pipe, wherein each sample air packet corresponds to a sampling inlet and includes an amplified concentration of air drawn from the corresponding sampling inlet; transporting the sample air including the plurality of sample air packets through the sampling pipe to the particle detector; and determining through which sampling inlet any particles entered the particle detection system.

A method includes deploying a fluid sampling tool string downhole, the fluid sampling tool string including a control module and a plurality of fluid sampling modules. The method also includes receiving, by the control module, a telemetry signal from a surface interface. The method also includes transmitting, by the control module, a downlink acoustic signal based at least in part on the received telemetry signal. The method also includes initiating a fluid sampling operation, by at least one of the plurality of fluid sampling modules, in response to the downlink acoustic signal.

Method for monitoring the odorous emissions of a plurality of zones (2, 3, 4, 5) of a given site (6); the method provides for the use of an electronic nose, and comprises a plurality of selective feeding steps, during each of which a respective sample coming from a relative zone is selectively conveyed to the electronic nose so as not to convey other gas samples coming from other zones to the electronic nose; according to some aspects of the invention, the selective feeding steps are repeated several times and the order of succession of the selective feeding steps is modified so as to control zones of particular interest more often.

Method for monitoring the odorous emissions of a plurality of zones (2, 3, 4, 5) of a given site (6); the method provides for the use of an electronic nose, and comprises a plurality of selective feeding steps, during each of which a respective sample coming from a relative zone is selectively conveyed to the electronic nose so as not to convey other gas samples coming from other zones to the electronic nose; according to some aspects of the invention, the selective feeding steps are repeated several times and the order of succession of the selective feeding steps is modified so as to control zones of particular interest more often.

A sample system for a fluid tank with an opening includes: a head unit, a sample vessel, a transport mechanism, and a controller. The head unit has a hollow body with a head connection that connects to the opening. The sample vessel includes a first sample chamber with a first sample valve disposed in a vessel body that fits within the hollow body. A first sample valve of the sample mechanism actuates to provide fluid communication to the first sample chamber. The transport mechanism connects to the head unit and the sample vessel, and moves the sample vessel between a home position and a first position. In the home position, the sample vessel is positioned within the hollow body. In the first position the sample vessel is lowered to a first level in the fluid tank, at which point the controller actuates the first sample valve.

An apparatus for collecting a dry material sample flowing in a duct is disclosed. The apparatus includes a sample tube having a closed distal end and a sample-inlet aperture in the wall of the sample tube adjacent the closed distal end, a housing configured as a fluid cylinder with a duct end and an outlet end and a piston mounted around and connected to the sample tube and positioned within the housing. The apparatus also includes first and second sealing sleeves around and slideably supporting the sample tube. The duct end includes the first sealing sleeve and the outlet end includes the second sealing sleeve. A duct-connecting structure extends between the duct end of the housing and the duct. The sample tube is a piston rod within the fluid-cylinder housing, and the fluid-cylinder housing is configured to extend and retract the sample tube within the duct.

An electrically passive device and method for in-situ acoustic emission, and/or releasing, sampling and/or measuring of a fluid or various material(s) is provided. The device may provide a robust timing mechanism to release, sample and/or perform measurements on a predefined schedule, and, in various embodiments, emits an acoustic signal sequence(s) that may be used for triangulation of the device position within, for example, a hydrocarbon reservoir or a living body.