FM330 Thermal gas flow sensor

It can be used for various gas measurements, such as compressed air, coal gas, natural gas, liquefied gas, flare gas, hydrogen, argon, ammonia, etc., and can also be used for gas leak detection.

Thermal gas flow sensors calculate gas flow based on the principle of heat conduction by measuring the cooling effect of gas flow on the heat source. Compared with other types of gas flow sensors, it features high precision, wide measurement range and fast response speed, and plays a significant role in industries such as petrochemicals, power, metallurgy, electronics, HVAC, water treatment and food. ​​

1. Petrochemical Industry

In petrochemical production, thermal gas flow sensors are often used to monitor and control the flow of various process gases. During the petroleum cracking process, it is necessary to precisely control the flow rates of gases such as hydrogen and ethylene to ensure the efficient progress of the cracking reaction and increase the product yield. Thermal gas flow sensors can measure the flow of these gases quickly and accurately, providing data support for the optimization of the production process. In addition, in the process of chemical waste gas treatment, for the flow monitoring of waste gas containing multiple complex components, thermal gas flow sensors, with their advantage of having a small difference in sensitivity to different gas components, can accurately measure the flow of waste gas, helping enterprises reasonably adjust the operating parameters of waste gas treatment equipment to ensure that the waste gas is discharged up to standard.​

2. Electric Power Industry

In thermal power plants, thermal gas flow sensors can be used to measure the air flow required for boiler combustion and the flow of emitted flue gas. Precise control of air flow helps to achieve complete fuel combustion, improve power generation efficiency, and reduce energy consumption and pollutant emissions. Thermal gas flow sensors can monitor the changes in air flow in real time and feed the data back to the control system to adjust the supply air volume in a timely manner. In terms of flue gas emission monitoring, accurately measuring flue gas flow is crucial for calculating the total amount of pollutant emissions and evaluating the treatment effect of environmental protection equipment. Thermal gas flow sensors provide reliable data support for the environmental protection operation and emission management of power plants.​

3. Metallurgical Industry

The metallurgical production process involves the use of a large amount of gas, and thermal gas flow sensors play a crucial role in flow monitoring in it. In the blast furnace ironmaking process of steel smelting, it is necessary to precisely control the flow rate of air and oxygen-enriched gas blown into the blast furnace to ensure the stable progress of reactions inside the furnace and increase the output and quality of molten iron. Thermal gas flow sensors can measure gas flow in real time, helping operators adjust the blower parameters promptly. In the smelting of non-ferrous metals such as copper and aluminum, the flow control of protective gases and reducing gases also relies on thermal gas flow sensors to ensure the precise implementation of the smelting process, improve the recovery rate of metals and product quality.​

4. Electronics Industry

In the field of electronic manufacturing, especially in the production process of semiconductor chips, the accuracy of process gas flow is required to be extremely high. Thermal gas flow sensors are often used to precisely control the flow of special gases such as silane, ammonia, and chlorine. These gases play a decisive role in key processes such as photolithography, etching, and thin film deposition. Even a slight deviation in their flow rate can affect the performance and yield of chips. The high precision and rapid response characteristics of thermal gas flow sensors can meet the strict requirements of the chip manufacturing process for gas flow control, ensuring the stability and consistency of chip production. Meanwhile, in the packaging process of electronic components, thermal gas flow sensors can be used to precisely control the flow of protective gas, prevent the oxidation of components, and enhance the reliability of products.

5. HVAC Industry

In HVAC systems, thermal gas flow sensors are mainly used to measure air flow and achieve precise regulation of the indoor environment. In the central air conditioning systems of large commercial buildings, office buildings and other places, by measuring the air flow of supply and return air, the ventilation and air exchange effect of the system can be understood in real time. According to parameters such as the density of people in the room, temperature and humidity, the fan speed and air volume can be automatically adjusted to achieve energy-saving operation and a comfortable indoor environment. In a fresh air system, thermal gas flow sensors can precisely control the amount of fresh air introduced, ensuring indoor air quality and providing people with a healthy living and working environment. In addition, in the ventilation systems of some industrial plants, thermal gas flow sensors can also be used to monitor the emission flow of harmful gases, ensuring the safety of the indoor air environment. ​

6. Water Treatment Industry

In the water treatment process, thermal gas flow sensors are mainly applied in the aeration stage. In the activated sludge process of a sewage treatment plant, introducing an appropriate amount of air into the aeration tank is the key to ensuring the activity of microorganisms and the effect of sewage treatment. The thermal gas flow sensor can measure the aeration air flow in real time. According to the water quality of the sewage and the treatment requirements, it automatically adjusts the operating parameters of the blower to achieve precise aeration, improve the efficiency of sewage treatment and reduce energy consumption. In the ozone disinfection process of drinking water treatment, precisely controlling the flow rate of ozone gas is crucial for ensuring the disinfection effect and avoiding ozone residue. Thermal gas flow sensors can meet this high-precision flow measurement requirement and guarantee the safety of drinking water.

7. Food Industry

Thermal gas flow sensors have a wide range of applications in the food production process. In the food packaging process, to extend the shelf life of food, methods such as nitrogen-filled packaging and modified atmosphere packaging are often adopted. It is necessary to precisely control the flow of gases such as nitrogen and carbon dioxide to ensure that the proportion of gases inside the packaging meets the requirements and prevent food from oxidizing and deteriorating. The high precision and stability of thermal gas flow sensors can meet the strict requirements for gas flow control in food packaging. During food processing, such as baking and frying, it is necessary to control the flow of gases like steam and natural gas to ensure the processing quality and taste of food. Thermal gas flow sensors can monitor and precisely control the flow of these gases in real time. In addition, in the ventilation system of food factories, thermal gas flow sensors can be used to monitor air flow, ensuring good air quality in the workshop and meeting the hygiene standards for food production.