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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Patent•
29 Jul 1999
TL;DR: In this paper, a flow meter with an ultrasonic fluid sensor mounted therein is used to sense the presence or absence of liquid flowing through the flow meter so that air flow is not erroneously measured as liquid flow.
Abstract: A system is provided that accurately measures the quantity of liquid that is transferred through a flow meter The system is composed of a flow meter with an ultrasonic fluid (liquid) sensor mounted therein that operates to sense the presence or absence of liquid flowing through the flow meter so that air flow is not erronecously measured as liquid flow When there is substantially no liquid flow through the meter, the ultrasonic fluid (liquid) sensor interrupts the transmission of an output signal from a signal-conditioning circuit to a totalizer that operates to process the signal and total the amount of liquid so that any non-liquid material passing through the meter is not included in the total amount of removed liquid by the totalizer Also provided are methods of using the system to accurately measure the amount of liquid flowing through a flow meter, such as in a grease trap pumping operation
9 citations
Patent•
23 May 2003TL;DR: In this article, a flow restrictor for a mass flow metering device formed of a solid material and slots originating from an outer surface towards inward is presented. But this restrictor is not suitable for large-scale systems.
Abstract: A flow restrictor (30) for a mass flow metering device formed of a solid material and slots (32) originating from an outer surface towards inward.
9 citations
Patent•
23 Sep 2004TL;DR: In this paper, a volumetric flow device, a momentum device, and a data processing device are used to measure the density and mass flow rate of a fluid stream, and the present invention also provides methods for using such system.
Abstract: A system for measuring the density and mass flow rate of a fluid stream. The system generally comprises a volumetric flow device, a momentum device, and a data processing device. The present invention also provides methods for using such system.
9 citations
Patent•
30 Oct 2006
TL;DR: In this article, a vibration transducer and carriers are respectively fastened to measuring tubes, where a vibration exciter or a vibration sensor is provided as the vibration transducers, and a passively effecting equalization mass is provided on the side which is on opposite side of the sensor.
Abstract: The device has a vibration transducer, and carriers (2), which are respectively fastened to measuring tubes (1), where a vibration exciter or a vibration sensor is provided as the vibration transducer. The exciter or the sensor effects actively on both sides of the measuring tube between the carriers. A passively effecting equalization mass is provided on the side which is on the opposite side of the sensor.
9 citations
TL;DR: In this paper, the development and the realization of three measurement systems based on this principle are presented, and they can measure liquid flows below 0.2 L/h using an air bubble in the form of a stopper.
9 citations