A fluid flow meter with configuration of flow generation and flow sensor is intended for measuring a flow rate of working fluid (a gas or a liquid) passing through an inner cavity. The meter is a compact measuring apparatus of a small size, resistant to disturbances and distortions in the structure of the measured fluid flow. The fluid flow meter with configuration of flow generation and flow sensor is comprised of the following components: a housing (1) having an inner chamber (2) and a depression (3) configured to generate the flow; a flow sensor (4) arranged inside the housing (1) of the gas meter for measuring the flow velocity of the fluid; an adapter (5) to adjust different diameters of flow sensors and an outlet of the meter; a flow preparation device (6) intended for dissipating and stabilizing the flow of the fluid; an inlet (7) of the flow of the measured fluid; an outlet (8) for fluid flow out of the meter; an electronics unit (9); a coarse filter (10); a shut-off valve (11); a fluid leak detection sensor (12).

The invention is directed towards methods, compositions, and apparatus for accurately detecting the presence and amounts of contaminants in wastewater. The method comprises the steps of adding to a volume of wastewater at least one tracer molecule, observing the tracer for indications of particular contaminants, conducting at least one second form of contamination detection, and interrelating the two measured properties to identify the specific composition of the contamination. Using a tracer molecule allows for the detection of otherwise hard to detect oils and grease. Use of the second method however compensates for tracer interfering contaminants and allows for more accurate readings. The invention includes feeding of functional chemicals in response to the detections and conducting the detections online and continuously.

An ageing and dust detection system, comprising: a data collection unit configured to collect a plurality of parameters of a gas meter; and a processing unit, configured to: receive the plurality of the parameters of the gas meter; calculate a numerical value of the plurality of the parameters; compare the calculated numerical value of the plurality of the parameters with a corresponding predefined higher range of values and a predefined lower range of values for the plurality of parameters; determine a reason of a fault in the gas meter based on the compared values, wherein the reason of the fault in the gas meter is at least one of, a presence of a dust, an ageing of the gas meter, or a combination thereof.

A filter arrangement with a top element and a bottom element and a filter element therebetween captures oversized particles on the upper surface of the filter element and tangentially rinses these particles using an elution fluid to provide a concentration of particles in a relatively low volume of fluid for further analysis. A configuration using a slider valve may also be utilized. Additionally, an arrangement of supply and receiving containers may be used to minimize the number of containers required. A mass flow meter may be incorporated to measure the flow of elution fluid. Finally, a wash stage of the filtering process may be used to introduce stain onto the particles for further analysis, such as that associated with Gram staining and these stained particles may be further analyzed.

A filter arrangement with a top element and a bottom element and a filter element therebetween captures oversized particles on the upper surface of the filter element and tangentially rinses these particles using an elution fluid to provide a concentration of particles in a relatively low volume of fluid for further analysis. A configuration using a slider valve may also be utilized. Additionally, an arrangement of supply and receiving containers may be used to minimize the number of containers required. A mass flow meter may be incorporated to measure the flow of elution fluid. Finally, a wash stage of the filtering process may be used to introduce stain onto the particles for further analysis, such as that associated with Gram staining and these stained particles may be further analyzed.

A minimal-amount powder metering device (1) for pharmaceutical or chemical applications, for metering powder volumes of less than 1 cm.sup.3, comprising a metering chamber (3) which is delimited by a surrounding wall (9) and which can be connected to a vacuum source (28) for suctioning powder in order to fill the metering chamber (3) with powder to be metered, filter means for retaining powder in the metering chamber (3) during a suctioning process being associated with the metering chamber (3), including the filter means are formed by the surrounding wall (9) and including at least one suction opening (12, 13) which serves to retain the powder in the metering chamber (3) and through which a vacuum can be applied to the metering chamber (3) is formed in the surrounding wall (9).

Dust filter (12), arranged to be installed in a gas meter upstream of a measuring module measuring a flow rate of a gas, the filter (12) comprising a housing (20) inside which a first chamber (23) and a second chamber (24) are defined, the first chamber being located above the second chamber when the filter is installed in the meter, the housing comprising an inlet opening (28) and outlet openings (34) formed at the first chamber, a filtering medium (50) being installed in the first chamber, the filter is arranged such that, when installed in the meter, gas enters the filter via the inlet opening, passes through the filtering medium, and exits the filter via the outlet openings, dust particles contained in the gas are then deposited on the base of the second chamber (24).

Dust filter (40) for a gas meter (1) which comprises an inlet channel (41) and an outlet channel (42) passing through one same first plane (P1), the dust filter comprising a filtering medium (43) wherein a hole is made, a cross-section of the filtering medium and a cross-section of the hole, along a second plane (P2) perpendicular to a thickness of the filtering medium, having for shapes, the shapes of a cross-section of the inlet channel and of the outlet channel along the first plane, the dust filter (40) thus being arranged such that, when it is installed in the meter (1), the gas, before entering into the measuring module, passes into the inlet channel through the filtering medium, and after exiting the measuring module, passes into the outlet channel through the hole.

A filter arrangement with a top element and a bottom element and a filter element therebetween captures oversized particles on the upper surface of the filter element and tangentially rinses these particles using an elution fluid to provide a concentration of particles in a relatively low volume of fluid for further analysis. A configuration using a slider valve may also be utilized. Additionally, an arrangement of supply and receiving containers may be used to minimize the number of containers required. A mass flow meter may be incorporated to measure the flow of elution fluid. Finally, a wash stage of the filtering process may be used to introduce stain onto the particles for further analysis, such as that associated with Gram staining and these stained particles may be further analyzed.

An arrangement for installation in a fluid line network contains a fluid meter having a housing with a fluid inlet and a fluid outlet, and a volume measuring part. At least one connector, which is intended for connection to the housing of the fluid meter, is either equipped with an additional function or configured for the adaptation of an additional function on the connector. The connector has a connector inflow and a connector outflow. The fluid meter and the connector form a modular unit that can be installed in the fluid line network.