There are two types of thermal mass flow meters in industry.

This type is most widely used for thermal mass flow meters in industry.

Fluid is being pumped through the mass flow meter.

The animation on the right represents how curved tube mass flow meters are designed.

A second type is the capillary-tube type of thermal mass flow meter.

Thermal mass flow meters are used almost entirely for gas flow applications.

As the name implies, thermal mass flow meters use heat to measure flow.

The primary reason thermal mass flow meters are popular in industrial applications is the way they are designed and built.

However, it was not until the 1960s and 1970s that industrial-grade thermal dispersion mass flow meters finally emerged.

Thus air flow meters are simply an application of mass flow meters for a special medium.

It is difficult to get a strong signal using thermal mass flow meters in liquids, due to considerations relating to heat absorption.

We use mass flow meters which have the advantage of yielding flow rates independent of temperature and air pressure.

Needle valves plus mass flow meters provides a cost-effective means to achieve desired flow rates.

The actual frequency of the vibration depends on the size of the mass flow meter, and ranges from 80 to 1000 vibrations per second.

Thermal mass flow meters using this method also have a heated sensor and another one that senses the temperature of the flow stream.

Thermal mass flow meters introduce heat into the flow stream and measure how much heat dissipates using one or more temperature sensors.

Needle valves: Mass flow meters may be purchased with mass flow controllers which permit setting flow rates.

Many mass flow controllers (MFC) which combine a mass flow meter, electronics and a valve are based on this design.

Thermal mass flow meter (also called thermal dispersion flowmeter) technology is used for compressed air, nitrogen, helium, argon, oxygen, and natural gas.

A mass flow meter, also known as an inertial flow meter is a device that measures mass flow rate of a fluid traveling through a tube.

A practical application of the Coriolis effect is the mass flow meter, an instrument that measures the mass flow rate and density of a fluid flowing through a tube.

Mass flow meters: The equations required for calculating rates of oxygen consumption or carbon dioxide production assume that the flow rates into and out of the chambers are known exactly.

The sample flush air is measured by a mass flow meter to ensure that a sufficient volume passes through the manifold and flask before the downstream valve is closed and pressurization begins.

Gas mass flow rate can be directly measured, independent of pressure and temperature effects, with thermal mass flow meters, Coriolis mass flow meters, or mass flow controllers.

This is because thermal mass flow meters monitor variations in one or more of the thermal characteristics (temperature, thermal conductivity, and/or specific heat) of gaseous media to define the mass flow rate.