Abstract: A mass flowmeter employing thermal dispersion technology, and method for determining mass flow of a fluid throughout a range beyond that which possible for a constant ?T instrument at increasing power, and below that with which a constant power instrument can provide rapid ?T readings.

Abstract: A mass flowmeter employing thermal dispersion technology, and method for determining mass flow of a fluid throughout a range beyond that which possible for a constant ?T instrument at increasing power, and below that with which a constant power instrument can provide rapid ?T readings.

Abstract: A device and method for conditioning media flowing within a conduit enabling sensors placed within short straight run distances to measure media flow with improved accuracy employing a thermal flow instrument. A flow conditioner downstream of a media flow measuring transducer has walls that diverge in the flow direction to optimize readings of the media flow from the transducer.

Abstract: A device and method for conditioning media flowing within a conduit enabling sensors placed within short straight run distances to measure media flow with improved accuracy employing a thermal flow instrument. A flow conditioner downstream of a media flow measuring transducer has walls that diverge in the flow direction to optimize readings of the media flow from the transducer.

Abstract: A device and method for conditioning media flowing within a conduit enabling sensors placed within short straight run distances to measure media flow with improved accuracy employing a thermal flow instrument. A flow conditioner downstream of a media flow measuring transducer has walls that diverge in the flow direction to optimize readings of the media flow from the transducer.

Abstract: A calibration system includes a tube or other conduit, a gas source, and a computational device. The tube has an end positioned relative to a flow sensor, and is in communication with the gas source. The tube and gas source introduce calibration gas into the tube at a repeatable mass flow. During a calibration operation, the conduit directs at least a portion of the calibration gas onto the flow sensor. The computational device is used to calculate an estimated flow rate of the calibration gas based upon the measurements obtained from the flow sensor.

Abstract: A compensated flowmeter having a probe adapted to project into flowing media within a conduit. The probe includes a thermal dispersion sensor, and a compensating gas properties sensor contained within a no-flow chamber of the probe. The thermal flow sensor has active and reference sensor elements that responsively provide output signals relating to a flow rate of the media. The compensating gas properties sensor has compensating active and reference sensor elements that responsively provide output signals relating to the heat transfer of the media. A suitable processor is typically implemented for adjusting the measured flow rate detected by the thermal dispersion sensor to compensate for changes in heat transfer detected by the compensating gas properties sensor.

Abstract: A flow meter having reference and active thermal sensing elements and a pressure transducer configured to be placed in a conduit of flowing fluid. Appropriate computation apparatus is employed to modify the flow velocity reading resulting from normal comparison of the thermal sensors in accordance with pressure differences reflected by the pressure transducer.