Thermal Gas Mass Flow Meter for Air Natural Gas Biogas Flow Measurement
Working Principle
The MEMS sensor consists of two patch platinum resistors, one measuring the temperature of the gas in the pipe and the other heated by an electric current, keeping the temperature difference between the two thermal resistors constant. As the gas flows through the thermal resistance, there is a cooling effect. As the flow rate increases, the cooling effect increases and the sensor power required to keep the temperature difference between the two thermal resistors constant increases.The power added to the heating resistance is proportional to the mass flow rate
Product features
A true mass flow meter can measure gas flow without the need for temperature and pressure compensation, making measurement convenient and accurate. It can provide the gas's mass flow or standard volumetric flow.Ø
Wide measurement range, capable of measuring gas flow rates from as high as 120 Nm/s to as low as 0.1 Nm/s, suitable for gas leak detection.
Good seismic performance and long service life. The sensor has no moving parts or pressure-sensing components, so its measurement accuracy is not affected by vibrations.
Installation and maintenance are simple. When site conditions permit, installation and maintenance can be carried out without stopping production.
Digital design. Overall digital circuit measurement, accurate measurement, and easy maintenance.
Using RS-485 communication, factory automation and integration can be achieved.
Measurement of oxygen, nitrogen, hydrogen, chlorine, and multi-component gases.
Measurement of blast furnace gas and coke oven gas.
Measurement of gas flow for natural gas, liquefied gas, flare gas, and other gases.
Measurement of primary air and secondary air flow in the power plant blast furnace.
Measurement of airflow in underground mine ventilation or exhaust systems.
Flue gas measurement.
Compressed air measurement.
Technical parameters
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Performance |
Technical Specifications |
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Structural form |
Insert type |
Pipeline-style |
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Measuring medium |
Common stable gases (unstable substances such as acetylene and boron trichloride cannot be measured) |
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Pipe diameter range |
DN65～4000mm |
DN10～300mm |
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Flow rate range |
0.1～100Nm/s |
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Accuracy |
±1～2.5% |
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Operating temperature |
Sensor：-40～+200℃ Converter：-20～+45℃ |
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Work pressure |
Medium Pressure ≤ 1.6 MPa |
Medium Pressure ≤ 1.6 MPa |
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Power supply |
(DC 24V or AC 220V) ≤ 18W |
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Response speed |
1s |
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Output signal |
4-20mA (photoelectric isolation, maximum load 500 ohms), RS-485 (photoelectric isolation requires custom order) |
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Alarm |
1-2 normally open contacts, 24V/0.5A |
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Supply Type |
Integrated structure |
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Pipe material |
Carbon steel, stainless steel, plastic, etc. |
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On-site display |
Four-line Chinese character LCD display |
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Display content |
Mass flow, standard volumetric flow, cumulative flow, standard flow velocity, etc. |
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Protection level |
IP65 |
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Sensor material |
Stainless steel |
Stainless steel |
Product detail
