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gas mass flowmeters types
Gas mass flow meters are widely used in various scientific research experiments, industrial equipment, and high-precision instruments due to their ability to be equipped
with various communication modes (analog, Modbus, DevicNet, EtherCAT and other industrial bus protocols), comparable standard data, high accuracy, precision, and
repeatability, simple installation method, and good controllability.
with various communication modes (analog, Modbus, DevicNet, EtherCAT and other industrial bus protocols), comparable standard data, high accuracy, precision, and
repeatability, simple installation method, and good controllability.
There are three main principles used in mainstream gas mass flow meters: 1. Thermal principle, 2. Differential pressure principle, and 3. Coriolis principle;
1. The thermal principle is mainly divided into three types: capillary heating, insertion heating, and microelectronics (MEMS flow chip) heating. Although these three types
of heating have different structures, the principle is to use sensors to perceive the amount of heat carried away by the gas and convert it into the mass flow rate of the gas.
of heating have different structures, the principle is to use sensors to perceive the amount of heat carried away by the gas and convert it into the mass flow rate of the gas.
Among these three types of thermal mass flow meters, capillary thermal technology is the most mature and widely applicable.
2. The principle of differential pressure is to use Poisson's law for compensation calculation. By measuring the pressure difference before and after the gas passes through
a certain section of the pipeline, the volumetric flow rate of the gas is calculated, and then converted to the flow rate under standard operating conditions.
a certain section of the pipeline, the volumetric flow rate of the gas is calculated, and then converted to the flow rate under standard operating conditions.
3. The Coriolis mass flow meter is based on the principle that when a fluid flows through a sensor circuit, the Coriolis force causes a variable phase shift, which is
proportional to the mass of the fluid; In fact, the flow data provided by the Coriolis mass flowmeter is pure mass flow with high accuracy. In practical applications, it is more
commonly used for measuring and controlling various liquid flow rates, mixed gases with unknown specific components, ultra-high pressure and high viscosity gases, or
gas-liquid mixed fluids.
proportional to the mass of the fluid; In fact, the flow data provided by the Coriolis mass flowmeter is pure mass flow with high accuracy. In practical applications, it is more
commonly used for measuring and controlling various liquid flow rates, mixed gases with unknown specific components, ultra-high pressure and high viscosity gases, or
gas-liquid mixed fluids.
If you want to know how to choose a gas flow controller for gas mass flow meters and pricing issues, please feel free to consult winny: sales01@cxflowmeter.com
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