Working principle of gas mass flow controller
Release time：
19 Sep,2024
Summary
A gas mass flow controller is a crucial instrument widely used in laboratories, industrial production, and other fields. Its operating principle is mainly based on measuring the mass flow rate of gas, rather than the volumetric flow rate, because the mass of gas contained in the same volume may differ under different temperatures and pressures.
In a gas mass flow controller, the gas first passes through a sensor for measurement, and the detector collects parameters such as gas density and temperature. Then, according to the set target flow rate value, the controller adjusts the signal output to the valve, thereby changing the speed of gas passing through the valve and controlling the flow rate. Common control methods include proportional-integral-derivative (PID) control and feedback control.
Because gas mass flow controllers mainly rely on gas density measurement for control, they offer higher accuracy and stability compared to traditional volumetric flow controllers. At the same time, it can adapt to changes in gas characteristics under different conditions, ensuring the stability and reliability of flow control.
In summary, a gas mass flow controller achieves precise flow control by measuring gas density and adjusting the valve opening according to the set value. It plays an important role in many experimental and industrial applications, helping to ensure process stability and product quality consistency.
More News
Tel: 400 006 6550
Office Address: 12. Stock, Gebäude I, Internationaler Innovationspark, Nr. 177 Songling Road, Laoshan District, Qingdao