Abstract: An apparatus for determining and/or monitoring mass flow of a fluid medium through a pipeline, or through a measuring tube. The apparatus includes two temperature sensors and a control/evaluation unit. The two temperature sensors are arranged in a region of a housing facing the medium and in thermal contact with the medium flowing through the pipeline, or through the measuring tube. A first of the temperature sensors is heatably embodied. A second of the temperature sensors provides information concerning the present temperature of the medium. The control/evaluation unit, on the basis of primary measured variables, such as temperature difference between the two temperature sensors and/or heating power fed to the first temperature sensor, ascertains the mass flow of the medium through the pipeline.

Abstract: The invention relates to an apparatus for determining and/or monitoring mass flow of a fluid medium (3) through a pipeline (2), or through a measuring tube. The apparatus includes two temperature sensors (11, 12) and a control/evaluation unit (10). The two temperature sensors (11, 12) are arranged in a region of a housing (5) facing the medium (3) and in thermal contact with the medium (3) flowing through the pipeline (2), or through the measuring tube. A first of the temperature sensors (11) is heatably embodied. A second of the temperature sensors (12) provides information concerning the present temperature of the medium (3). The control/evaluation unit (10), on the basis of primary measured variables, such as temperature difference (?T=T2?T1) between the two temperature sensors (11, 12) and/or heating power (P) fed to the first temperature sensor (11), ascertains the mass flow of the medium (3) through the pipeline (2).

Abstract: A method for operating a flow meter incorporating thermal loss sensors and an installation adapter to provide known flow conditions upstream of the meter.

Abstract: A method for operating a flow meter incorporating thermal loss sensors and an installation adapter to provide known flow conditions upstream of the meter.

Abstract: A flow meter incorporating thermal loss sensors and an installation adapter to provide known flow conditions upstream of the meter. The installation adapter is in the form of a tubular extension projecting from a flange which in use is sandwiched between a pipeline flange and a flow meter flange. The flanges are configured such that a passageway defined by the adapter extension is located in a predetermined position relative to the flow meter. The flow meter may comprise a sensor array supporting at least three sensors which are not in alignment, one of those sensors being located centrally within the flow meter and the others being distributed at equal distances around the central position. In use, normal readings may be taken from a single one of the sensors, the other sensors being used for initial calibration and subsequent calibration test purposes only.

Abstract: A flow meter incorporating thermal loss sensors and an installation adapter to provide known flow conditions upstream of the meter. The installation adapter is in the form of a tubular extension projecting from a flange which in use is sandwiched between a pipeline flange and a flow meter flange. The flanges are configured such that a passageway defined by the adapter extension is located in a predetermined position relative to the flow meter. The flow meter may comprise a sensor array supporting at least three sensors which are not in alignment, one of those sensors being located centrally within the flow meter and the others being distributed at equal distances around the central position. In use, normal readings may be taken from a single one of the sensors, the other sensors being used for initial calibration and subsequent calibration test purposes only.