Flow Sensor
Flow meters are divided into differential pressure flow meters, rotameters, throttling flow meters, slit flow meters, volumetric flow meters, electromagnetic flow meters, ultrasonic flow meters, etc. Classification by medium: liquid flowmeter and gas flowmeter.
What is a flowmeter?
Measurement is the eye of industrial production. Flow measurement is one of the components of measurement science and technology. It is closely related to national economy, national defense construction and scientific research. Doing this work well plays an important role in ensuring product quality, improving production efficiency and promoting the development of science and technology. Especially in today's era of energy crisis and increasing automation of industrial production, the position and role of flowmeter in the national economy are more obvious.
The commonly used unit in engineering is m3 / h, which can be divided into instantaneous flow and cumulative flow. Instantaneous flow is the amount passing through the effective section of closed pipeline or open channel in unit time, and the substances flowing through can be gas, liquid and solid; Cumulative flow refers to the cumulative amount of fluid flowing through the effective section of closed pipeline or open channel in a certain time interval (one day, one week, one month and one year). The cumulative flow can also be obtained by integrating the instantaneous flow with time, so the instantaneous flowmeter and cumulative flowmeter can also be transformed into each other
So where is the flowmeter (Electronic flow sensors) mainly used?
The applications of flow measurement technology and instruments generally include the following fields.
Ultrasonic liquid level sensors industrial production
Flow meter (liquid/water flow) is one of the major categories of process automation instruments and devices. It is widely used in various fields of national economy such as metallurgy, electric power, coal, chemical industry, petroleum, transportation, construction, light textile, food, medicine, agriculture, environmental protection and people's daily life. It is to develop industrial and agricultural production, save energy and improve product quality, An important tool to improve economic efficiency and management level plays an important role in the national economy. In the process automation instruments and devices, the flow instrument has two functions: as the detection instrument of the process automation control system and the total quantity table for measuring the quantity of materials.
Energy measurement
Energy is divided into primary energy (coal, crude oil, coalbed methane, petroleum gas and natural gas), secondary energy (electric power, coke, artificial gas, product oil, liquefied petroleum gas and steam) and energy carrying working medium (compressed air, oxygen, nitrogen, hydrogen, water), etc. energy metering is an important means to scientifically manage energy, achieve energy conservation and consumption reduction, and improve economic benefits. Flow meters are an important part of energy metering instruments. Water, artificial gas, natural gas, steam and oil products all use an extremely large number of flow meters, which are important for energy management and economic accounting Indispensable tools.
Environmental protection
The discharge of flue gas, waste liquid and sewage seriously pollutes the atmosphere and water resources and seriously threatens the human living environment. The state has listed sustainable development as a national policy, and environmental protection will be the biggest topic in the 21st century. In order to control air and water pollution, management must be strengthened, and the basis of management is the quantitative control of pollution. Flowmeter has an irreplaceable position in the flow measurement of flue gas discharge, sewage and waste gas treatment.
China is a country with coal as its main energy source. There are millions of chimneys in the country that constantly discharge smoke into the atmosphere. Flue gas emission control is an important project to eradicate pollution. Each chimney must be equipped with flue gas analyzer and flowmeter to form a continuous emission monitoring system. There are great difficulties in the flow and quantity of flue gas. The difficulties are large and irregular chimney size, variable gas composition, large flow rate range, dirt, dust, corrosion, high temperature, no straight pipe section, etc.
Transportation
There are five ways: railway, highway, aviation, water transportation and pipeline transportation. Although pipeline transportation has long existed, it is not widely used. With the prominence of environmental protection problems, the characteristics of pipeline transportation have attracted people's attention. Pipeline transportation must be equipped with flowmeter, which is not only the eye of control, distribution and dispatching, but also a necessary tool for safety supervision and economic accounting.
Pharmaceuticals
The 21st century will usher in the century of life science, and the industry characterized by biotechnology will develop rapidly. There are many substances to be monitored and measured in biotechnology, such as blood, urine, etc; In the pharmaceutical industry, the control flow instruments for various pharmaceutical formulas and liquid preparation components are also inconsistent or lacking. The instrument development is very difficult and has a wide variety.
Scientific experiment
Scientific experiments need not only a large number of flowmeters, but also extremely complex varieties. According to statistics, a large part of the more than 100 kinds of flow meters are needed for scientific research. They are not mass produced and sold in the market. Many scientific research institutions and large enterprises have set up special teams to develop special flow meters.
Oceans, rivers and lakes
These areas are open flow channels, which generally need to detect the flow rate and then calculate the flow. The physical principle and hydrodynamics basis of flow meter and flowmeter are common, but the instrument principle, structure and application premise are very different.
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, FBelec can provide flow sensor solutions.
