A flow meter includes two parts, a flow unit which can be fitted between fluid pipes and a detection unit snapped on the flow unit. The flow unit has a housing which accommodates a measuring chamber in which there is a rotating measuring ball. The detection unit is snapped on the measuring chamber and has a C-shaped housing part. Inside the housing part there is a printed circuit board which is also C-shaped and is present at a distance from the inner wall of the housing part. When the detection unit is snapped on the measuring chamber, the ends of the housing part will be bent outward. As a result of the clearance between the inner wall of the housing part and the printed circuit board and the fact that the housing part is slidable relative to the printed circuit board, the printed circuit board is not bent.

A flow meter includes two parts, a flow unit which can be fitted between fluid pipes and a detection unit snapped on the flow unit. The flow unit has a housing which accommodates a measuring chamber in which there is a rotating measuring ball. The detection unit is snapped on the measuring chamber and has a C-shaped housing part. Inside the housing part there is a printed circuit board which is also C-shaped and is present at a distance from the inner wall of the housing part. When the detection unit is snapped on the measuring chamber, the ends of the housing part will be bent outward. As a result of the clearance between the inner wall of the housing part and the printed circuit board and the fact that the housing part is slidable relative to the printed circuit board, the printed circuit board is not bent.

A system and method of controlling and monitoring a cementing process injecting a cement slurry down a well that causes a return of a drilling fluid includes a first and second flowmeters disposed in the primary return conduit configured to generate a flow rate measurements of the returned drilling fluid, a first control valve receiving control signals from a microprocessor to regulate conducting the returned drilling fluid to a reservoir, a choke valve disposed downstream from the first and second flowmeters receiving control signals from a microprocessor to regulate diverting the returned drilling fluid in the primary return conduit in response to a detection of the presence of gas in the returned drilling fluid, and a mud-gas separator disposed in the primary return conduit configured to receive the diverted drilling fluid and separate the diverted drilling fluid into a mud component for return to the reservoir and a gas component for controlled burn off.

A system and method of controlling and monitoring a cementing process injecting a cement slurry down a well that causes a return of a drilling fluid includes a first and second flowmeters disposed in the primary return conduit configured to generate a flow rate measurements of the returned drilling fluid, a first control valve receiving control signals from a microprocessor to regulate conducting the returned drilling fluid to a reservoir, a choke valve disposed downstream from the first and second flowmeters receiving control signals from a microprocessor to regulate diverting the returned drilling fluid in the primary return conduit in response to a detection of the presence of gas in the returned drilling fluid, and a mud-gas separator disposed in the primary return conduit configured to receive the diverted drilling fluid and separate the diverted drilling fluid into a mud component for return to the reservoir and a gas component for controlled burn off.

A flow rate measurement system outputs a measurement value which represents a magnitude of a flow rate and a flow direction of a fluid that flows through a particular main passage. The system includes a bypass passage disposed in the main passage, a detection unit disposed in the bypass passage that outputs a detection value corresponding to a magnitude of a flow rate and a flow direction of the fluid flowing through the bypass passage, and a calculation unit that, by using the detection value, calculates the measurement value by compensating as needed for a delay in the change in flow rate in the bypass passage with respect to the change in flow rate in the main passage. The compensation is based on whether a change of flow direction has occurred in the main passage or the bypass passage.

The invention relates to an arrangement of a flow measuring device with a testing device. The flow measuring device comprises an inlet section and an outlet section. A rotor is arranged between the inlet section and the outlet section. The rotor is designed for a rotational movement in the event of a fluid flow between the inlet section and the outlet section. At least one indicator element is arranged on the rotor. The flow measuring device further comprises a measuring element, which is adapted to detect a movement of the indicator element. The indicator element comprises a magnetic material. The testing device is designed to set the rotor in rotational motion, preferably without contact. The invention further relates to a method for the functional testing of a flow measuring device.

A photonic integrated circuit comprises a silicon nitride waveguide, an electro-optic modulator formed of a III-nitride waveguide structure disposed on the silicon nitride waveguide, a dielectric cladding covering the silicon nitride waveguide and electro-optic modulator, and electrical contacts disposed on the dielectric cladding and arranged to apply an electric field to the electro-optic modulator.

A water heater including an inflow terminal for connecting a tankless water heater to a cold water supply and an outflow terminal for connecting the tankless water heater to a tap. A fluid channel proves a fluid connection from the inflow terminal to the outflow terminal. A heat element arrangement is arranged at or within at least a section of the fluid channel for transferring heat to fluid present within the fluid channel. An electronic controller is configured to control a heating power provided to the heat element arrangement. A flow sensor is arranged at or within the fluid channel downstream the heat element arrangement. The electronic controller is further configured to detect the presence of air bubbles within the fluid channel based on a change of a flow signal provided by the flow sensor and to adapt the heating power provided to the heat element arrangement in reaction to the determination of air bubbles.

A water heater including an inflow terminal for connecting a tankless water heater to a cold water supply and an outflow terminal for connecting the tankless water heater to a tap. A fluid channel proves a fluid connection from the inflow terminal to the outflow terminal. A heat element arrangement is arranged at or within at least a section of the fluid channel for transferring heat to fluid present within the fluid channel. An electronic controller is configured to control a heating power provided to the heat element arrangement. A flow sensor is arranged at or within the fluid channel downstream the heat element arrangement. The electronic controller is further configured to detect the presence of air bubbles within the fluid channel based on a change of a flow signal provided by the flow sensor and to adapt the heating power provided to the heat element arrangement in reaction to the determination of air bubbles.

The invention relates to an arrangement of a flow measuring device with a testing device. The flow measuring device comprises an inlet section and an outlet section. A rotor is arranged between the inlet section and the outlet section. The rotor is designed for a rotational movement in the event of a fluid flow between the inlet section and the outlet section. At least one indicator element is arranged on the rotor. The flow measuring device further comprises a measuring element, which is adapted to detect a movement of the indicator element. The indicator element comprises a magnetic material. The testing device is designed to set the rotor in rotational motion, preferably without contact. The invention further relates to a method for the functional testing of a flow measuring device.