Gas flow meter principle

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Guide: Gas flow meter, as the name suggests, is an instrument for measuring gas flow, then what is the principle of gas flow meter ? Let's take a look at it with Xiaobian~

First, the principle of gas flow meter - - Introduction

A gas flow meter, a meter for measuring gas flow, is installed in a pipeline to measure various chemical gases such as gas, natural gas, hydrogen, nitrogen, benzene, sulfur dioxide, methane, and hydrogen peroxide. . One of the most common gas flow meters is a thermal gas flow meter that can perform both gas flow measurement and process control with other equipment, and has a simple structure and high accuracy. It is highly resistant to abrasion and is therefore widely used.

Second, the principle of gas flowmeter

Thermal gas flow meters primarily utilize the principle of thermal diffusion. The physical conditions of the thermal diffusion principle consist primarily of two temperature-sensitive RTDs, one of which acts as a speed sensor and the other as a temperature sensor for automatic compensation of gas temperature changes. When the physical conditions are met, the thermal gas flow meter is in normal working condition. Once the gas flows, the temperature sensor increases or decreases its temperature to maintain a constant gas flow, so the current in the circuit can be passed. The measurement is made to judge the flow rate of the gas. The faster the gas flow rate, the more heat is removed, which causes the temperature of the sensor to decrease. In order to keep the temperature constant, the current in the circuit increases. Conversely, when the current in the circuit decreases, the gas flow rate is also decreasing, and the flow rate is The current has a proportional relationship.

Third, the principle of gas flow meter - - application

The measurement of the gas flow rate is actually applied in various fields. In industrial production, it can be used as a measuring instrument for process automation control systems. It can also be used as a total meter for measuring the quantity of materials. In terms of energy metering, it is used for energy sources such as primary energy, secondary energy, and energy-carrying working fluid. Measurement is an indispensable instrumental instrument in the process of energy management and economic accounting; in environmental protection, it can be used for quantitative control of wastewater and waste gas; in biotechnology, it can be used for detection of blood and urine; in scientific experiments A variety of measuring instruments are also required.

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