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Natural Gas Mass Flowmeters

Jan 02, 2019


Gas mass flowmeters


Thermal gas mass flow meters can be used for both gas flow metering and process control.

It introduces advanced technology from the United States,

and measures the mass flow of the fluidm

without temperature and pressure compensation.

Its outstanding features are:

no moving parts;

low pressure loss;

wide range ratio;

high precision;

high reliability;

simple installation and convenient operation.


The thermal gas mass flow meter is used to measure the following media:

blast furnace gas, coke oven gas, gas,

air, nitrogen, acetylene, phosgene,

hydrogen, natural gas, nitrogen,

liquefied petroleum gas, hydrogen peroxide,

flue gas, methane, butane, chlorine,

gas, biogas, carbon dioxide, oxygen,

Air, argon, toluene, benzene, xylene, hydrogen sulfide, sulfur dioxide, ammonia, etc.


The thermal gas flow meter uses the principle of thermal diffusion,

which is a technology with excellent performance and high reliability under severe conditions. Code


The sensing element consists of two thermal resistors (platinum RTD),

one is a speed sensor and the other is a temperature sensor

that compensates for gas temperature changes.


.When two RTDs are placed in the medium,

where the speed sensor is heated to a constant temperature above ambient temperature,

the other temperature is passed


The sensor is used to sense the temperature of the medium.

The mass flow of gas, through the velocity sensor,

is calculated by the amount of heat transfer from the sensing element.

Gas flow rate increase, the amount of heat taken away by the medium increases.

The sensor temperature is reduced accordingly.

To keep the temperature constant,

it is necessary to increase the operating current through the sensor, which is proportional to the flow rate of the medium.


At present, the gas flowmeter used in China,

has a problem of small range ratio,

and the flow below the lower limit of the range is basically lost, yet this is in some collars.


The domain is unacceptable and is even more unbearable in trade settlements such as gas. The thermal gas mass flow meter solves this problem satisfactorily


Application of gas mass flow meters:


This product is widely used in iron and steel plants,

coking plants, petroleum, chemical, thermal,

medical, thermal power plants, environmental protection and other industries.


Can be carried out:


●Steel plant, coking plant gas flow measurement


●Boiler air flow, measuring secondary air volume


● Smoke flow measurement from the chimney


●Measurement of waterfall gas flow in water treatment


●Cement, cigarette, glass flow measurement during production


●Compressed air flow measurement


● Gas flow measurement of natural gas, gas, liquefied gas, flare gas, hydrogen, etc.


There are many types of flowmeters.

By 2015, the differential pressure flowmeters,

that are often used in the market include:

Bitoba flowmeter, orifice flowmeter, V-cone flowmeter, Annubar flowmeter, and Powerbar flowmeter. Toba tube flowmeter, elbow flowmeter, open channel flowmeter, etc.


Flow measurement is the science of material quality change. The law of quality mutual change is the basic law of the connection development of things.

Thus, the measurement object is not limited to the pipeline liquid in the traditional sense.

The flow measurement problem is wherever there is a need to master the quantity change. Flow rate, pressure and temperature are listed as three test parameters. For a certain fluid, as long as you know these three parameters, you can calculate the energy it has. These three parameters must be detected in the energy conversion measurement.

Energy conversion is the basis of all production processes,

and scientific experiments,

so flow is the most widely used as pressure and temperature instruments.


 You may be interested in what is a pressure transmitter.


Natural Gas Mass Flowmeters Should Be Regularly Tested And Maintained

Natural gas mass flow meters are mainly used for

flow measurement of industrial pipeline medium fluids,

such as gases, liquids, steam and other media.

It is characterized by small pressure loss, large measuring range and high precision.

It is almost unaffected by parameters,

such as liquid density, pressure and temperature when measuring the volume flow rate. No moving mechanical parts, so the reliability is high and the maintenance is small. Instrument parameters can be stable for a long time.


The large advantage of the natural gas mass flowmeter,

is that the anti-vibration performance is particularly good,

there is no zero drift, and the reliability is high.

Through a large number of waveform analysis,

and spectrum analysis of the flowmeter for a long time,

a good probe shape, wall thickness, height,

probe rod diameter and matching piezoelectric crystals

are designed, which are processed by an advanced CNC lathe.

The technical parameters,

such as the coaxiality and smoothness of the processing,

combined with special processing,

thus largely overcome the common problem of the inherent,

self-oscillating frequency of the vortex flowmeter on the signal.


Natural gas mass flowmetersshould be tested and maintained during the work process. In the process of using, there will be zero drift, you should learn to analyze the cause of zero drift and find a solution. A zero drift of the flowmeter can result in inaccurate measurement accuracy. So, we often need to test and maintain the mass flow meter.


1, Zero check (zero calibration)

Zero drift is a problem often encountered in the actual operation of the flowmeter:

there are many factors that cause zero drift,

such as the installation stress of the sensor,

the structural asymmetry of the measuring tube,

and the change of the physical property parameters of the measured fluid.

Especially in small flow measurement,

the effect of zero drift on measurement accuracy is more serious. Therefore, it is necessary to perform zero check and adjustment on a regular basis. The zero check should be carried out at least three months.

When the production permits,

the time interval of the zero check should be appropriately shortened for the Coriolis mass flowmeter,

installed at the important monitoring point.

Whether the zero calibration is completed,

is the key to directly affecting

whether the natural gas mass flowmeter operates within the accuracy range.


Natural gas mass flowmeters should be regularly tested and maintained

2. Inspection of working parameters

During the use of natural gas mass flowmeter,

it should always pay attention to whether the set working parameters have changed,

whether the displayed flow, density, and temperature values are normal.

If there is a large difference between the actual and the actual,

it can be described in the instruction manual.

The method re-zeros the flow calibration.

If the above work still does not feel normal after completion,

you should check whether the working parameters set inside the transmitter are correct.


3. Observe the flowmeter's fault indication regularly.

Depending on the model, specifications, and manufacturer of the flowmeter,

the fault display method and contents vary.

For different fault alarm indications,

check the product instruction manual to determine the cause of the fault and handle it.


Natural gas mass flowmeters should be regularly tested and maintained

4, Regular comprehensive inspection and maintenance

For the flowmeter in use,

it should be thoroughly inspected regularly:

from the appearance of the natural gas mass flowmeter sensor,

the degree of installation, the vibration of the process pipeline,

the indication of the transmitter and the display instrument, etc.

It should be handled in time.


High-end flowmeter brand, to meet customer needs first,

quality as the weight, let customers use the rest assured.

Vortex flowmeter is a common choice for natural gas flow.

Huaheng Instrument's reputation in the industry and customer feedback are satisfactory:

high precision, durable, long service life, low failure rate and good after-sales service. Huaheng Instrument is only a boutique, and customer satisfaction is our driving force.


Contact us now:


Email: huahengxa@gmail.com ||


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