A flow meter for measuring a flow rate of a fluid may include a cartridge containing certain components such as a flow sensor. The cartridge is removable from the flow meter such that it may be replaced with a new cartridge, allowing calibration of the flow meter while enabling the flow meter to continue to be operated with another cartridge in the place of the removed cartridge. The flow meter may be configured to direct fluid flow away from selected components of the flow meter.

A viscosity measurement system and method of fabrication thereof, the system comprising a measuring element and a housing, the measuring element comprising a base and a counterweight, forced oscillation generating means, a tube, and a rod; the base, the counterweight and the forced oscillation means being sealed in the housing; the tube extending out of the housing through an opening in a bottom wall of the housing; the forced oscillation generating means being connected to an electric board secured to a top wall of the housing opposite the bottom wall for excitation of the rod; and the rod extending within the tube and immerging of the housing for immersion, at least in part, in a fluid to be measured, wherein the counterweight is distant from the top wall and from lateral walls of the housing, and the base is supported by the bottom wall of the housing in such a way to simultaneously provide a rigid attachment on an outer circumference of the bottom wall and on a circumference of the opening in the bottom wall, and a flexible dampening attachment on a remaining interface between a bottom surface of the base of the measuring element and an upper surface of the bottom wall of the housing.

A viscosity measurement system and method of fabrication thereof, the system comprising a measuring element and a housing, the measuring element comprising a base and a counterweight, forced oscillation generating means, a tube, and a rod; the base, the counterweight and the forced oscillation means being sealed in the housing; the tube extending out of the housing through an opening in a bottom wall of the housing; the forced oscillation generating means being connected to an electric board secured to a top wall of the housing opposite the bottom wall for excitation of the rod; and the rod extending within the tube and immerging of the housing for immersion, at least in part, in a fluid to be measured, wherein the counterweight is distant from the top wall and from lateral walls of the housing, and the base is supported by the bottom wall of the housing in such a way to simultaneously provide a rigid attachment on an outer circumference of the bottom wall and on a circumference of the opening in the bottom wall, and a flexible dampening attachment on a remaining interface between a bottom surface of the base of the measuring element and an upper surface of the bottom wall of the housing.

A flow sensor chip includes a substrate in which a cavity having an opening is formed, a membrane provided on a surface of the substrate so as to cover the opening, a heater provided inside the membrane, a first thermopile and a second thermopile provided in the membrane, and a heat conduction member for heat conduction between the substrate and the membrane. A first hot junction and a first cold junction of a thermocouple provided in the first thermopile and a second hot junction and a second cold junction of a thermocouple provided in the second thermopile are arranged at positions overlapping with the opening in a plan view. The heat conduction member includes a first heat conduction member for heat conduction between the first cold junction and the substrate and a second heat conduction member for heat conduction between the second cold junction and the substrate.

The invention relates to a metering device for adjusting and/or controlling a gas flow, characterised in that the metering device comprises an electrically controllable valve, wherein the gas flow through the metering device can be adjusted and/or controlled by means of the electrically controllable valve, wherein the metering device has a pressure sensor, wherein a gas pressure difference across a gas-outlet opening in the metering device can be measured by means of the pressure sensor, wherein the electrically controllable valve can be adjusted according to the measured gas pressure difference; and/orwherein the metering device comprises an adjustable pressure-control device, wherein a maximum gas pressure difference between an inlet region of the metering device and an outlet region of the metering device can be set by means of the adjustable pressure-control device, wherein the gas flow through the metering device, which gas flow can be adjusted by means of the electrically controllable valve, is limited by the maximum gas pressure difference between the inlet region of the metering device and the outlet region of the metering device which is set by means of the adjustable pressure-control device.

The invention relates to a metering device for adjusting and/or controlling a gas flow, characterised in that the metering device comprises an electrically controllable valve, wherein the gas flow through the metering device can be adjusted and/or controlled by means of the electrically controllable valve, wherein the metering device has a pressure sensor, wherein a gas pressure difference across a gas-outlet opening in the metering device can be measured by means of the pressure sensor, wherein the electrically controllable valve can be adjusted according to the measured gas pressure difference; and/orwherein the metering device comprises an adjustable pressure-control device, wherein a maximum gas pressure difference between an inlet region of the metering device and an outlet region of the metering device can be set by means of the adjustable pressure-control device, wherein the gas flow through the metering device, which gas flow can be adjusted by means of the electrically controllable valve, is limited by the maximum gas pressure difference between the inlet region of the metering device and the outlet region of the metering device which is set by means of the adjustable pressure-control device.

A viscosity measurement system and method of fabrication thereof, the system comprising a measuring element and a housing, the measuring element comprising a base and a counterweight, forced oscillation generating means, a tube, and a rod; the base, the counterweight and the forced oscillation means being sealed in the housing; the tube extending out of the housing through an opening in a bottom wall of the housing; the forced oscillation generating means being connected to an electric board secured to a top wall of the housing opposite the bottom wall for excitation of the rod; and the rod extending within the tube and immerging of the housing for immersion, at least in part, in a fluid to be measured, wherein the counterweight is distant from the top wall and from lateral walls of the housing, and the base is supported by the bottom wall of the housing in such a way to simultaneously provide a rigid attachment on an outer circumference of the bottom wall and on a circumference of the opening in the bottom wall, and a flexible dampening attachment on a remaining interface between a bottom surface of the base of the measuring element and an upper surface of the bottom wall of the housing.

A viscosity measurement system and method of fabrication thereof, the system comprising a measuring element and a housing, the measuring element comprising a base and a counterweight, forced oscillation generating means, a tube, and a rod; the base, the counterweight and the forced oscillation means being sealed in the housing; the tube extending out of the housing through an opening in a bottom wall of the housing; the forced oscillation generating means being connected to an electric board secured to a top wall of the housing opposite the bottom wall for excitation of the rod; and the rod extending within the tube and immerging of the housing for immersion, at least in part, in a fluid to be measured, wherein the counterweight is distant from the top wall and from lateral walls of the housing, and the base is supported by the bottom wall of the housing in such a way to simultaneously provide a rigid attachment on an outer circumference of the bottom wall and on a circumference of the opening in the bottom wall, and a flexible dampening attachment on a remaining interface between a bottom surface of the base of the measuring element and an upper surface of the bottom wall of the housing.

A liquid dosing device for a container includes a dosing chamber having a front end and a back end. An outlet passage is located at the front end. A plunger is located in the dosing chamber, divides it in a front and a back space, and is moveable between a forward position in which the plunger closes off the outlet passage, and a backward position, in which the front space has a maximal volume. An inlet passage provides fluid communication between the front space and the container. A timer passage provides fluid communication between the container and the back space. A release passage, being greater than the timer passage, provides fluid communication between the back space and the container. A valve assembly at the release passage includes a valve seat located at the back end of the dosing chamber.

A liquid dosing device for a container includes a dosing chamber having a front end and a back end. An outlet passage is located at the front end. A plunger is located in the dosing chamber, divides it in a front and a back space, and is moveable between a forward position in which the plunger closes off the outlet passage, and a backward position, in which the front space has a maximal volume. An inlet passage provides fluid communication between the front space and the container. A timer passage provides fluid communication between the container and the back space. A release passage, being greater than the timer passage, provides fluid communication between the back space and the container. A valve assembly at the release passage includes a valve seat located at the back end of the dosing chamber.