This article needs additional citations for verification. Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed. Find sources: "Mass flow controller" – news · newspapers · books · scholar · JSTOR(September 2018) (Learn how and when to remove this message)
A mass flow controller (MFC) is a device used to measure and control the flow of liquids and gases.[1] A mass flow controller is designed and calibrated to control a specific type of liquid or gas at a particular range of flow rates. The MFC can be given a setpoint from 0 to 100% of its full scale range but is typically operated in the 10 to 90% of full scale where the best accuracy is achieved. The device will then control the rate of flow to the given setpoint. MFCs can be either analog or digital. A digital flow controller is usually able to control more than one type of fluid whereas an analog controller is limited to the fluid for which it was calibrated.
All mass flow controllers have an inlet port, an outlet port, a mass flow sensor and a proportional control valve. The MFC is fitted with a closed loop control system which is given an input signal by the operator (or an external circuit/computer) that it compares to the value from the mass flow sensor and adjusts the proportional valve accordingly to achieve the required flow. The flow rate is specified as a percentage of its calibrated full scale flow and is supplied to the MFC as a voltage signal.
Mass flow controllers require the supply gas or liquid to be within a specific pressure range. Low pressure will starve the MFC of fluid and cause it to fail to achieve its setpoint. High pressure may cause erratic flow rates. There are many different technologies which can help to measure the flow of the fluids and eventually help in controlling flow. Those technologies define the types of Mass Flow Controllers, and they include differential pressure (ΔP), differential temperature (ΔT), Coriolis, Ultrasonic, electromagnetic, turbine, etc.
^Tison, S. A. (1996). "A critical evaluation of thermal mass flow meters" (PDF). Journal of Vacuum Science & Technology A: Vacuum, Surfaces, and Films. 14 (4): 2582–2591. Bibcode:1996JVSTA..14.2582T. doi:10.1116/1.579985. ISSN 0734-2101. S2CID 39546958. Archived from the original (PDF) on 2019-03-02.
and 27 Related for: Mass flow controller information
A massflowcontroller (MFC) is a device used to measure and control the flow of liquids and gases. A massflowcontroller is designed and calibrated to...
mass energy of a system. Energy flow rate has SI units of kilojoule per second or kilowatt. Continuity equation Fluid dynamics Massflowcontroller Mass...
A mass (air) flow sensor (MAF) is a sensor used to determine the massflow rate of air entering a fuel-injected internal combustion engine. The air mass...
ultrasonic flow meters, thermal mass flowmeters, Coriolis mass flowmeters, or massflowcontrollers. For liquids, various units are used depending upon the...
Many massflowcontrollers (MFC) which combine a massflow meter, electronics and a valve are based on this design. Furthermore, a thermal massflow meter...
compression fittings. Flow control valve Massflowcontroller Needle valve Supercritical fluid chromatographic detection by use of a parallel flow restrictor What...
acquired 2007 Dressler site closed 2010 PV Powered acquired 2010 Massflowcontroller business and gas cabinet business sold to Hitachi Metal (Japan)....
Density, and Flow Units Used in MassFlow Meters and MassFlowControllers. SEMI. Retrieved March 24, 2024. Spitzer, D. W. (1991). Flow Measurement: Practical...
unspecified amount. Its products include thermal massflowcontrollers/meters, Coriolis massflowcontrollers/meters, variable area meters (aka rotameters)...
industry, such as with a vaporizer, vaporizer with a bubbler, or a mass-flowcontroller. Originally the precursor was just thermally cracked, but suitable...
reactor chamber during the production of high brightness LEDs. Description of a Bubbler System Liquid injection system based on MassFlowController v t e...
A programmable logic controller (PLC) or programmable controller is an industrial computer that has been ruggedized and adapted for the control of manufacturing...
Bluetooth headsets, the host stack and controller stack can be run on the same microprocessor to reduce mass production costs; this is known as a hostless...
pressures. Constant massflow supply: Precision massflowcontrollers are used to control the flow rate of each gas for blending. Massflow meters may be installed...
Instrumentation details Minor bypass lines Instrumentation Controllers like Level Control or Flow Control Isolation and shutoff valves Maintenance vents and...
discernible flow instabilities, such as compressor surge or rotating stall. When the massflow rate drops to a critical value at which discernible flow instabilities...
regulating the supply of these co-reactants to the reactor is using a massflowcontroller attached between the source and the reactor. They can also be diluted...
Flight controllers work at computer consoles and use telemetry to monitor various technical aspects of a space mission in real-time. Each controller is an...
Needle valves: Mass flow meters may be purchased with massflowcontrollers which permit setting flow rates. These are expensive, however. Respirometry research...
will vary if its mass is changed. This difference in resting location is the offset error. The proportional band is the band of controller output over which...
control fluid flow by varying the size of the flow passage as directed by a signal from a controller. This enables the direct control of flow rate and the...
components of rap include "content" (what is being said, e.g., lyrics), "flow" (rhythm, rhyme), and "delivery" (cadence, tone). Rap differs from spoken-word...