Thermal gas mass flowmeter

NegotiableUpdate on 12/14

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Nature of the Manufacturer: Producers

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Online Consult

Overview

Accurate measurement of gas flow is crucial for ensuring process stability, cost control, and achieving green development in fields such as industrial production, energy monitoring, and environmental governance. As a direct instrument for measuring gas mass flow, the thermal gas mass flowmeter has become the core equipment for gas flow monitoring in many industries due to its advantages such as no temperature and pressure compensation, high measurement accuracy, and convenient maintenance.

Product Details

In the fields of industrial production, energy management, environmental monitoring, etc., accurate measurement of gas flow is a key link to ensure production efficiency, control costs, and achieve green development.Thermal gas mass flowmeterAs a high-precision flow measurement device based on the principle of heat conduction, it has become the mainstream choice to replace traditional differential pressure and volumetric flow meters due to its advantages of no temperature and pressure compensation, fast response speed, and wide measurement range. It is widely used in various industries such as petrochemicals, biomedicine, new energy, and environmental protection.

1、 Product definition and working principle: Accurate measurement logic based on heat conduction

Thermal gas mass flowmeterIt is an instrument that directly measures gas mass flow rate, and its core principle is based onLaw of heat conductionandfluid mechanicsThe combination. Equipment typically consists of two key components: a platinum resistor (heat source) for heating and a temperature sensor for detecting temperature changes (detecting gas temperature and temperature near the heat source, respectively).

During operation, the instrument will apply a constant power to the heat source to maintain a stable high temperature state. When gas flows through the sensor, it will take away some heat, causing a decrease in the temperature of the heat source; At the same time, the temperature sensor will monitor the temperature difference between the gas itself and the heat source in real time. Due to the fixed proportional relationship between the heat carried away by gas and the mass flow rate of gas - the larger the mass flow rate, the more heat carried away, and the smaller the temperature difference - the instrument can use a built-in high-precision algorithm to calculate the real-time mass flow rate of gas in reverse based on the temperature difference, and convert the data into standard signals (such as 4-20mA current signal, RS485 digital signal) for output, which facilitates subsequent display, recording, and control.

Compared with traditional volumetric flow meters such as orifice flow meters and vortex flow meters,Thermal gas mass flowmeterWithout the need for additional temperature or pressure sensors for compensation calculations, mass flow data can be directly obtained, avoiding measurement errors caused by temperature and pressure fluctuations, especially suitable for scenarios with complex working conditions and easily changing parameters.

2、 Core technological advantage: Performance highlights that adapt to multiple scenarios

Thermal gas mass flowmeterThe reason why it stands out among numerous flow measurement devices is due to its outstanding performance in accuracy, adaptability, stability, etc., which can be summarized as the following five advantages:

1. High measurement accuracy, no need for compensation

Due to the direct measurement of gas mass flow rate rather than volume flow rate, the equipment is not affected by changes in environmental parameters such as temperature, pressure, and humidity, and does not require additional compensation calculations. Under normal operating conditions, the measurement accuracy can reach ± 1% FS (full range), which can meet the needs of high-precision measurement scenarios such as natural gas trade settlement and chemical raw material proportioning.

2. Wide range of measurement, suitable for multiple flow rates

Thermal gas mass flowmeterThe range ratio (the ratio of the maximum measured value to the minimum measured value) can reach 100:1 or even higher, covering a wide range from low flow velocity (0.1m/s) to high flow velocity (100m/s). Whether it is monitoring small flow rates (such as laboratory gas sampling) or controlling large flow rates (such as industrial boiler combustion gas supply), it can work stably, avoiding the measurement failure problem caused by traditional instruments due to range mismatch.

3. No mechanical moving parts, low maintenance cost

The equipment adopts a fully electronic structure, with no mechanical moving parts such as gears or impellers inside, and there are no problems such as wear and blockage. The service life can reach 5-10 years. Meanwhile, sensor probes are usually made of corrosion-resistant and high-temperature resistant materials (such as 316L stainless steel, Hastelloy), which can adapt to measurement environments with corrosive gases (such as hydrogen sulfide, chlorine gas) or high-temperature gases (up to 400 ℃), reducing the frequency and cost of daily maintenance.

4. Fast response speed and good dynamic tracking performance

Thanks to *'s signal processing technology,Thermal gas mass flowmeterThe response time can be as low as 0.1 seconds, which can quickly capture instantaneous changes in gas flow rate. In scenarios that require real-time control, such as gas feed regulation in chemical reactors and gas protection systems in new energy batteries, equipment can provide timely feedback on flow data to help control systems achieve precise adjustments and improve the stability of the production process.

5. Easy installation, compatible with various pipelines

The device supports multiple installation methods, including plug-in, pipeline, flange, etc., which can be flexibly selected according to the pipeline diameter (from DN10 to DN2000) and installation space. Plug in installation does not require cutting off the pipeline, and only requires opening holes on the pipeline to complete the installation, greatly reducing the difficulty and downtime of on-site construction; Pipeline installation is suitable for high-precision measurement scenarios, ensuring the stability and consistency of measurements.

3、 Industry application scenarios: comprehensive coverage from industrial production to environmental monitoring

Thermal gas mass flowmeterIts excellent performance makes it play a key role in multiple industries. The following is a specific introduction to typical application scenarios:

1. Petrochemical industry: Ensuring production safety and efficiency

In petrochemical production, precise control of gas flow rate is directly related to reaction efficiency and production safety. For example, in an ethylene cracking unit,Thermal gas mass flowmeterCan be used to monitor the flow rate of cracking gas, ensuring stable reaction temperature and pressure; In natural gas transmission pipelines, equipment can achieve trade settlement measurement of natural gas with an accuracy of ± 0.5% FS, meeting the requirements of national measurement standards; In addition, sensors made of corrosion-resistant materials can ensure long-term stable operation during the treatment of corrosive gases such as hydrogen sulfide and ammonia, avoiding production interruptions caused by equipment failures.

2. Environmental Protection Industry: Assisting in Monitoring Pollutant Emissions

With the increasingly strict environmental regulations, real-time monitoring of industrial waste gas emissions has become an important requirement for enterprise compliance.Thermal gas mass flowmeterIt can be used for flue gas flow measurement in scenarios such as garbage incineration plants, steel plants, and power plants, and can be used in conjunction with gas analyzers to achieve collaborative monitoring of "flow+concentration", accurately calculating the emissions of pollutants such as particulate matter, sulfur dioxide, and nitrogen oxides. The wide range and fast response characteristics of the equipment can adapt to the large fluctuations in flue gas flow, ensuring the accuracy and real-time monitoring data, and providing reliable basis for the supervision of environmental protection departments.

3. Biomedical industry: meeting high cleanliness requirements

The production of biopharmaceuticals requires high environmental cleanliness and precision in processes,Thermal gas mass flowmeterCan be used for monitoring clean air supply in sterile workshops, controlling oxygen/nitrogen flow in fermentation tanks, and other scenarios. The surface of the sensor has undergone special treatment to prevent microbial growth and comply with GMP (Good Manufacturing Practice) requirements; At the same time, high-precision measurement capability can ensure the stability of gas ratio during the fermentation process, improving the production quality and qualification rate of drugs.

4. New energy industry: supporting the improvement of new energy production efficiency

In the field of new energy,Thermal gas mass flowmeterThe application is equally widespread. For example, in the production of photovoltaic cells, equipment can be used to monitor the flow rate of inert gases (such as argon) during the silicon wafer coating process to ensure coating uniformity; In the hydrogen energy industry, equipment can be used for flow measurement in hydrogen transmission pipelines. Due to the low density and easy leakage of hydrogen, the high-precision and fast response characteristics of thermal flow meters can detect flow abnormalities in a timely manner, ensuring the safety of hydrogen transmission; In addition, in the drying workshop of lithium battery production, the equipment can also be used for flow control of drying gas to avoid moisture affecting battery performance.

4、 Selection and maintenance suggestions: Ensure long-term stable operation of the equipment

1. Key parameters for selection

in the selectionThermal gas mass flowmeterWhen doing so, it is important to pay close attention to the following parameters:

medium characteristicsClearly determine the composition of the measured gas (whether it contains corrosive, flammable, and explosive components), temperature, and pressure, and select suitable sensor materials and instrument ranges;

measurement rangeSelect an instrument with an appropriate range ratio based on the maximum and minimum actual flow rates, ensuring that the flow rate is between 20% and 80% of the range under normal operating conditions to ensure measurement accuracy;

Installation requirementsAccording to the diameter of the pipeline, installation space, and process requirements, choose the insertion type, pipeline type, or flange type installation method, while paying attention to whether there are eddies, impurities, etc. inside the pipeline to avoid affecting measurement accuracy.

2. Key points of daily maintenance

regular cleaningFor measurement scenarios involving dusty gases, the sensor probe should be cleaned every 3-6 months to avoid dust adhesion affecting thermal conductivity efficiency;

Calibration and verificationIt is recommended to conduct on-site calibration or factory verification once a year to ensure that the instrument accuracy meets the requirements;

troubleshootingIf there is abnormal measurement data, you can first check whether the power and signal lines are normal, then check whether the sensor is blocked or damaged, and if necessary, contact the manufacturer's technical personnel for repair.

5、 Summary: The core assistance of precise measurement

Thermal gas mass flowmeterWith its advantages of high precision, wide range, low maintenance, and fast response, it has become a core measuring equipment in modern industrial production, energy management, environmental monitoring, and other fields. With the continuous improvement of industrial automation level and increasingly strict environmental protection requirements,Thermal gas mass flowmeterThe application scenarios will be further expanded, and its technology will also develop towards higher precision, wider temperature and pressure range, and more intelligent direction (such as integrating IoT functions to achieve remote monitoring and data analysis).

For enterprises, choosing the right oneThermal gas mass flowmeterNot only can it improve the accuracy and reliability of flow measurement, reduce production and maintenance costs, but it can also provide strong support for optimizing the production process, efficient energy utilization, and environmental compliance, which is an important guarantee for achieving high-quality development of enterprises.