Thermal mass flow meters are crucial instruments in various industries, used to measure the flow rate of gases. Usine d'instruments de Hongguang, a leading manufacturer in the field, offers state-of-the-art thermal mass flow meters that combine precision, reliability, and advanced technology. This article provides a comprehensive overview of thermal mass flow meter, their features, and their applications, highlighting specific numerical parameters to showcase their capabilities.
Understanding Thermal Mass Flow Meters
A thermal mass flow meter measures the mass flow rate of gases by detecting heat transfer. It operates on the principle that as gas flows past a heated sensor, it carries heat away from the sensor. The rate at which heat is carried away is directly proportional to the mass flow rate of the gas. This principle allows thermal mass flow meters to provide highly accurate measurements.
Key Components and Working Principle
- Heated Sensor
Typically, a heated sensor and a temperature sensor are placed in the flow stream. The heated sensor introduces a known amount of heat to the gas. - Temperature Sensor
The temperature sensor measures the temperature of the gas before and after it passes the heated sensor. - Flow Measurement
The difference in temperature readings is used to calculate the mass flow rate, considering the thermal properties of the gas.

Numerical Parameters
- Flow Range
Hongguang Instrument Factory’s thermal mass flow meters can measure flow rates from 0.01 m/s to 100 m/s, making them suitable for a wide range of applications. - Précision
These meters offer an accuracy of ±1% of reading, ensuring precise measurements. - Temperature Range
They can operate in temperatures ranging from -40°C to 200°C, demonstrating their robustness in extreme conditions. - Pressure Rating
Capable of handling pressures up to 50 bar, they are ideal for industrial applications.
Features of Hongguang Instrument Factory’s Thermal Mass Flow Meters
Hongguang Instrument Factory’s thermal mass flow meters come equipped with several advanced features that make them stand out in the market.
High Accuracy and Sensitivity
The high accuracy (±1% of reading) ensures reliable data, which is crucial for process control and monitoring. The meters are also highly sensitive, capable of detecting very low flow rates, as low as 0.01 m/s, making them ideal for applications requiring precise measurement.
Wide Measurement Range
With a flow range from 0.01 m/s to 100 m/s, these flow meters can handle both low and high flow rates, providing versatility across different applications. This wide range allows for their use in diverse industrial settings, from small laboratory setups to large-scale industrial processes.

Robust Construction
Constructed with high-grade materials, these flow meters are designed to withstand harsh industrial environments. The ability to operate at temperatures from -40°C to 200°C and pressures up to 50 bar ensures their durability and reliability in various conditions.
Easy Installation and Maintenance
Hongguang Instrument Factory’s thermal mass flow meters are designed for easy installation and maintenance. The insertion type design allows for quick installation without the need for extensive modifications to existing pipelines. Maintenance is also simplified, reducing downtime and operational costs.
Digital Output and Connectivity
These flow meters are equipped with digital output options, such as 4-20 mA, pulse, and RS485, ensuring compatibility with various data acquisition and control systems. This feature facilitates seamless integration into existing process control systems, enhancing overall efficiency.
Applications of Thermal Mass Flow Meters
The versatility and accuracy of thermal mass flow meters make them suitable for a wide range of applications across different industries.
Industrial Gas Flow Measurement
Thermal mass flow meters are extensively used in industrial settings to measure the flow of gases such as air, nitrogen, hydrogen, and natural gas. Their high accuracy and wide measurement range make them ideal for monitoring and controlling gas flow in manufacturing processes.

HVAC Systems
In HVAC (Heating, Ventilation, and Air Conditioning) systems, thermal mass flow meters are used to measure and control the flow of air and other gases. This helps in maintaining optimal environmental conditions and improving energy efficiency.
Environmental Monitoring
Thermal mass flow meters play a critical role in environmental monitoring by measuring the flow of gases in stacks and ducts. This is essential for ensuring compliance with environmental regulations and monitoring emissions.
Chemical and Petrochemical Industries
In the chemical and petrochemical industries, these flow meters are used to measure the flow of various gases involved in production processes. Their ability to operate under high pressure and temperature conditions makes them suitable for these demanding applications.
Biotechnology and Pharmaceuticals
In the biotechnology and pharmaceutical industries, precise gas flow measurement is crucial for various processes, including fermentation and gas chromatography. Thermal mass flow meters provide the accuracy and reliability needed for these applications.
Conclusion
Thermal mass flow meters from Hongguang Instrument Factory are essential tools for accurate and reliable gas flow measurement across various industries. Their high accuracy, wide measurement range, robust construction, and ease of installation and maintenance make them a preferred choice for industrial applications. Whether it’s for industrial gas flow measurement, HVAC systems, environmental monitoring, or the chemical and pharmaceutical industries, Hongguang Instrument Factory’s thermal mass flow meters deliver exceptional performance and reliability.