Topic
Thermal mass flow meter
About: Thermal mass flow meter is a research topic. Over the lifetime, 1759 publications have been published within this topic receiving 21878 citations.
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TL;DR: In this paper, the authors investigated the response of commercial Coriolis meters to a step change in mass flow rate with a view to establishing the ultimate limits of the overall meter response.
31 citations
Patent•
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19 Nov 1973
TL;DR: In this paper, a mass flow air meter for use in a mass air flow type electronic fuel injection system for an engine to measure air flow through an air induction system including a scheduled area valve consisting of a butterfly valve cooperating with scheduled valve throat area openings whereby the pressure drop in the induction passage through this valve is held approximately constant during changes in fluid flow by allowing the valve throat opening to vary.
Abstract: A mass flow air meter for use in a mass air flow type electronic fuel injection system for an engine to measure mass air flow through an air induction system including a scheduled area valve consisting of a butterfly valve cooperating with scheduled valve throat area openings whereby the pressure drop in the induction passage through this valve is held approximately constant during changes in fluid flow by allowing the valve throat area openings to vary.
31 citations
TL;DR: In this article, a calibration facility based on the gravimetric method has been developed at NRLM for small mass flow rates of gas and two differently sized sonic venturis were tested using this facility and the results show that they can work well as a flow transfer standard for up to 5 g/min.
31 citations
Patent•
03 Apr 1997
TL;DR: In this article, an electric circuit is coupled to each of the multiple secondary flow paths for measuring the corresponding flow rate in the primary flow path as a function of temperature of the fluid flowing in the secondary flow path.
Abstract: A multi-channel mass flow transducer (10) having a single laminar flow element (24) in a primary fluid flow path (14) and multiple secondary flow paths (16) in parallel with and in fluid communication with the primary flow path. An electric circuit (18) is coupled to each of the multiple secondary flow paths for measuring the corresponding flow rate in the primary flow path as a function of temperature of the fluid flowing in the secondary flow paths. A circuit (18) coupled to each of the secondary flow paths includes at least one temperature responsive element (20) in thermal communication with the fluid in the corresponding secondary flow path.
31 citations
Patent•
22 Feb 1990
TL;DR: In this article, a mass-flow meter with temperature sensors is designed for measuring mass flow rates of liquids or gases, containing a heat conductive tube through which the mass flow to be measured occurs and of which the beginning (3) and the end (4) are kept at the same temperature, as well as one or more means to raise the temperature in the tube and means to measure the temperature of the mass in different places.
Abstract: Mass-flow meter with temperature sensors, designed for measuring mass flow rates of liquids or gases, containing a heat conductive tube (1), through which the mass flow to be measured occurs and of which the beginning (3) and the end (4) are kept at the same temperature, as well as one or more means (56) to raise the temperature in the tube and means to measure the temperature of the mass in the tube in different places. In or on the tube one or more facilities are applied with which the zero-offset of the means to measure the temperature can be eliminated in a physical instead of an electronic way.
31 citations