To provide an airflow amount measuring device capable of accurately measuring a flow amount of air without occurrence of warpage in a thin film portion when an airflow measuring element is mounted on a lead frame to form a resin-sealed package in which the airflow amount measuring element and the lead frame are sealed. A chip package includes a lead frame, an element mounted on the lead frame and having a detection portion, and a structure for sealing the lead frame and the element such that at least the detection portion is exposed. Then, the curvature radius ρ of the exposed portion of the element exposed from the sealing resin member is 2.13 or less.

A measurement control device includes: a sensing unit that outputs a signal according to an air flow rate; a pulsation state calculation unit that calculates a pulsation state of pulsation generated in the air flow rate using an output value of the sensing unit; and a pulsation error correction unit that corrects the air flow rate. The pulsation state calculation unit has an upper extreme value determination unit and a frequency calculation unit. The upper extreme value determination unit cancels the upper extreme value that has presently appeared, when the output value remains to be more than a predetermined lower threshold. The upper extreme value determination unit updates the lower threshold on a basis of at least one of air flow rate, pulsation frequency, or pulsation amplitude specified on the basis of the output value.

A flow meter is shown. The flow meter includes a housing extending along an axis and defining an interior volume, the interior volume extending between an inlet port and an outlet port. The flow meter further includes an insert positioned within the interior volume and spaced apart from the housing, the insert extending along the axis. A first region between at least part of the insert and the housing along the axis defines a first flow pathway, and a second region within the insert and along the axis defines a second flow pathway.

A flow rate regulator s provided that decouples regions (7) of a regulating body (2) of a flow rate regulator (1) such that one of the decoupled regions (7) forms a low-pressure region (9) while another of the decoupled regions (7) defines a high-pressure region (8).

An equal mixture of gas flows from multiple inputs is provided to gas analysis instrumentation, despite the unequal gas flow properties of the inputs often seen in practice. E.g., due to unequal input sample line lengths. We provide gas flow symmetry into a gas manifold that provides the output(s) to the gas analysis instrument(s). Such symmetry has two parts—equal gas flow properties from a set of reference points (one reference point for each input) to the manifold, and equal pressures at the reference points. Such equal pressures can be provided for unequal input gas flow properties by having a bypass valve for each input controlled so as to equalize the pressures.

There is described a fluid flow measuring and control device for installation within plumbing. The device comprises a main flow channeling system having an inlet and an outlet for connection to the plumbing, and a bypass channeling system in parallel from the main flow channeling system. A flowmeter is provided in the bypass channeling system for measuring the fluid flow in the bypass channeling system and thereby estimating the fluid flow at the inlet or at the outlet of the main flow channeling system. The flowmeter may comprise a wheel and a pair of movement sensors. A valve such as a solenoid valve can be provided as an on/off control for the plumbing. Using a microcontroller, the device can identify which appliance is used and determine consumption, or detect abnormal use or leaks and close the valve and/or notify a user mobile device.

There is described a fluid flow measuring and control device for installation within plumbing. The device comprises a main flow channeling system having an inlet and an outlet for connection to the plumbing, and a bypass channeling system in parallel from the main flow channeling system. A flowmeter is provided in the bypass channeling system for measuring the fluid flow in the bypass channeling system and thereby estimating the fluid flow at the inlet or at the outlet of the main flow channeling system. The flowmeter may comprise a wheel and a pair of movement sensors. A valve such as a solenoid valve can be provided as an on/off control for the plumbing. Using a microcontroller, the device can identify which appliance is used and determine consumption, or detect abnormal use or leaks and close the valve and/or notify a user mobile device.

The design and structure of a vortex flow meter with large dynamic range utilizing a micro-machined thermal flow sensing device for simultaneously measurement of volumetric flowrate via vortex street frequency as well as mass flowrate is exhibited in this disclosure. The micro-machined thermal flow sensing device is placed at the central point of a channel inside the bluff body where the channel direction is not perpendicular to the direction of fluid flow in the conduit. The thermal flow sensing device is operating in a time-of-flight principle for acquiring the vortex street frequency such that any surface conditions of the device shall not have significant impact to the measured values. With a temperature thermistor on the same micro-machined thermal flow sensing device, the vortex flow meter shall be able to output the fluid temperature as well as the fluid pressure.

A sensor device for determining at least one parameter of a fluid medium flowing through a duct, e.g., an intake air mass flow of an internal combustion engine, includes: a sensor housing, e.g., a sensor plug that is placed or that can be placed into a flow tube, in which the duct is fashioned; and at least one sensor chip situated in the duct for determining the parameter of the fluid medium. The sensor chip has a sensor area. The sensor housing has an inlet into the duct that is oriented opposite a main direction of flow of the fluid medium, and has at least one outlet from the duct. The sensor area is covered at least partly by an electrically conductive layer.

A sensor device for determining at least one parameter of a fluid medium flowing through a duct, e.g., an intake air mass flow of an internal combustion engine, includes: a sensor housing, e.g., a sensor plug that is placed or that can be placed into a flow tube, in which the duct is fashioned; and at least one sensor chip situated in the duct for determining the parameter of the fluid medium. The sensor chip has a sensor area. The sensor housing has an inlet into the duct that is oriented opposite a main direction of flow of the fluid medium, and has at least one outlet from the duct. The sensor area is covered at least partly by an electrically conductive layer.