Flue gas flowmeter | Pipeline pressure transmitter

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1. What brand of differential pressure transmitter is better for gas flow meters?

1. Rosemount 309

5. Fuji, Rosemount, Honeywell and other brands are better.

2、 Differential pressure transmitter is a transmitter that measures the pressure difference between the two ends of the transmitter. The measured result is pressure difference. The difference between differential pressure transmitters and general pressure transmitters is that they have two pressure interfaces. Differential pressure transmitters are generally divided into positive pressure end and negative pressure end. In general, the pressure at the positive pressure end of the differential pressure transmitter should be greater than the pressure in the negative pressure section in order to measure. Measure the pressure difference between the positive and negative ends of the medium, and convert it into a standard current signal (4-20mA) that can reflect the pressure difference. Differential pressure transmitters are used to measure the liquid level and density of liquids, gases, or vapors. The basic principle of an intelligent differential pressure transmitter is to divide a space into two chambers using sensitive elements (often membrane boxes), and when pressure is introduced into each chamber, the sensor produces displacement (or displacement trend) under the combined action of the two pressures. This displacement is proportional to the pressure difference (differential pressure) between the two chambers and is converted into a standard signal output that can reflect the magnitude of the differential pressure.

3、 The main feature of a gas mass flowmeter is that it is not affected by temperature and pressure fluctuations. It

2. Pipeline pressure transmitter

3. What is a good way to measure flue gas flow? I hope you can explain the reasons. There are various methods for measuring flue gas flow, including pressure difference method, thermal equilibrium method, ultrasonic method, etc. Each method has its own applicable scenarios and advantages and disadvantages. Differential pressure method: This is a commonly used method for monitoring smoke flow rate, which determines the flow rate by measuring the smoke flow velocity. The differential pressure method has the advantages of easy operation and low cost, such as the differential pressure balanced flowmeter (A+QMC). But it may be affected by factors such as the roughness of the flue wall, resulting in significant measurement errors. Thermal equilibrium method: This method utilizes the principle of thermal conduction to accurately measure gas mass flow rate, and has the advantages of small volume, high digitalization, easy installation, and accurate measurement. However, it can only measure the flow rate of gases such as oxygen, and is not suitable for measuring gases such as hydrogen, acetylene, and gases with high water content. Ultrasonic metho

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