The Aitory gas mass flow meter (MFC) plays a key role in flue gas analyzers, mainly used for precise control and measurement of the flow rate of sampled gases, which is crucial for obtaining accurate and reliable pollutant concentration data.

Characteristics of several MFC products from Etuoli that may be applied to flue gas analyzers

Main characteristics of the model, potential application scenarios

MFC300 accuracy ± 0.5% F.S., response time<1s, supports multiple communication protocols, suitable for precision flue gas analysis that requires fast response and multiple gas measurements

MFC330 has built-in temperature and pressure sensors, and integrated display operation is suitable for smoke analysis systems that are sensitive to environmental conditions or require on-site monitoring

🔍 The key role of MFC in flue gas analyzer

The core role of gas mass flow controller (MFC) in flue gas analyzer is mainly reflected in the following aspects:

Accurate control of sampling flow rate: Ensure a constant gas flow rate entering the analyzer. No matter how the pressure inside the flue fluctuates, MFC can stabilize the flow rate at the set value through a closed-loop control system. This is crucial for ensuring that sensors have sufficient response time and representative analysis results, and is also a prerequisite for meeting environmental monitoring regulations.

Realize automatic dilution measurement: Faced with high concentration flue gas from waste incineration, industrial kilns, etc., the concentration of pollutants may far exceed the measurement limit of the analyzer. At this point, MFC can be used to achieve automatic dilution sampling. The system precisely controls the flow rates of sample gas and clean dilution air through two MFCs, mixes them in a preset ratio (such as 1:100), and then sends them to the analyzer for measurement. This not only expands the range of the instrument, but also protects the sensor from damage caused by high concentration or high humidity gases.

Ensuring system stability and diagnosing faults: The real-time flow data provided by MFC is the "stethoscope" for diagnosing system status. For example, when the sampling probe or filter element is blocked by dust, the flow rate will decrease abnormally; When there is a leak in the pipeline, the flow rate will abnormally increase. MFC can issue timely alerts to prompt users to perform maintenance, thereby ensuring the long-term stable operation of the system.

💡 How to choose the appropriate MFC

When choosing an Aituoli MFC for a flue gas analyzer, it is recommended that you focus on the following points:

Accuracy and response speed: Typically, MFCs with an accuracy within ± 1% F.S. and a response time of less than 1 second are sufficient for most flue gas analysis applications. For scenes that require rapid capture of concentration changes, faster response time and higher accuracy are more advantageous.

Corrosion resistance: The smoke composition is complex and may contain corrosive gases such as SO ₂ and NOx. Therefore, it is necessary to choose MFC with corrosion-resistant materials such as 316L stainless steel and Hastelloy for the flow path.

Communication interface: Confirm whether the communication protocol of MFC (such as RS485, CAN, etc.) can be smoothly connected to your analyzer's main control system, which is important for achieving automation control.

Working pressure difference range: Ensure that the working pressure difference range of MFC meets the pressure conditions of the on-site flue, and when necessary, use pressure reducing valves or back pressure valves to stabilize the pressure at the inlet and outlet of MFC