A Microflow meter is also called a microfluidic flow meter or a low flow meter. The Micro flow meters we are going to discuss here mainly include gear flow meters, turbine flow meters, ultrasonic flow meters, and mass flow meters.
How to choose a suitable Microflow meter depends on your actual measurement requirements. Let us analyze it together.
Ultrasonic flow meter for Micro flow
Strap on flow meter X3 is a kind of ultrasonic external clamp-on flow meter. Strap on flow meter X3 is easy to install. Suitable for measuring pipe diameter Φ9.53~Φ90.
The micro flow meter is a special flow meter designed to measure the micro flow using the turbine principle. It has extremely high accuracy, especially under high temperature and high pressure conditions. Due to the smart structure design, no precipitation will be formed during work, so the work of the instrument is completely “clean”.
Micro Motion Coriolis Flow Meter is a flow meter made according to the Coriolis acceleration theory. Z-Series Straight Tube Micro Motion Coriolis Flow Meter simultaneously measures mass flow, density, temperature and viscosity.
The micro-motion mass flowmeter is a flowmeter made according to the Coriolis acceleration theory. There is a straight tube that rotates in a plane around a fixed axis O at an angular velocity w, and a particle in the tube moves outwards along the straight tube at a speed v. Because The mass point m is in a system with both rotational motion and linear motion, so it will obtain two accelerations.
Serving size:
① Centripetal acceleration a, its value is rw^2 (r is the distance from the particle m to the axis O), and the direction points to the axis O. ② Tangential acceleration ac, its value is 2uw. The direction is perpendicular to a, it comes from the rotating pipe. At the same time it produces a reaction force to the pipe. This reaction force is the Coriolis force. Its calculation formula is:
F=2muw —————-(3-8)
Where: F is Coriolis force, N; w is the angular velocity, 1/s; u is the radial velocity in the rotating system, m/s, m is the mass of the moving object, kg.
If the density of the fluid is p, the tangential Coriolis force on any section of pipe △x is:
△F=2pA△xuw ———(3~9)
Where: A is the cross-sectional area of the pipe.
In the formula (3-9), pAu is the natural flow rate of the fluid, set as QM’, then the formula (3-9) can be expressed as:
△F= 2w△xQm————-(3-10)
From the above equation, we can know the mass flow Qm as long as the Coriolis force △F is measured. This is the measuring principle of micro-motion mass flowmeter.
Micro Flow Meter is a micro oval gear flow meter. DN4-DN10. Suitable for flow measurement of various low-flow liquids.
Micro Flow Meter has strong adaptability to the viscosity of the liquid to be measured. There is no special Especially suitable for automobile fuel consumption, boiler fuel, medicine, food, chemical raw materials, wine, milk, vegetable oil cans Accurate measurement of small flow rates of various liquids.
A low flow meter is a meter specially used to measure small flow. There are many common flowmeters suitable for measuring tiny ones. Such as differential pressure type, float type, volume type, and so on. Some of these flow meters are suitable for measuring large flow rates. It is also suitable for measuring small flow. Others specialize in designing solutions for measuring small flow rates.
Flow rate meter, also known as “flow meter”, is an instrument that measures the speed of water flow. There are many kinds of models by and flow meter. For example, there are two types of rotary cup type and rotary paddle type flow meters commonly used in hydrological stations.
Flowmeter is one of the important measuring instruments in process automation instruments and devices. According to the physical properties of the measured medium, it can be divided into liquid flow meters and gas flow meters.
Among them, there are many types of liquid flow meters. Common liquid flow meters are vortex flowmeter, turbine flowmeter, electromagnetic flowmeter, ultrasonic flowmeter, positive displacement flowmeter, differential pressure flowmeter, rotameter, open channel flowmeter, Coriolis mass flowmeter Wait.
There are many methods and tools for measuring and controlling liquids. But it should be selected according to the actual working conditions on-site. Every instrument that measures liquid flow has its own characteristics. Choose according to its applicable characteristics. Only in this way can the performance of the instrument be brought into play.
There are many types of flowmeters, the most commonly used are as follows: 1. Electromagnetic flowmeter 2. Vortex flowmeter 3. Ultrasonic flowmeter 4. Orifice flowmeter 5. Precession vortex flowmeter
The user must provide the following parameters to select a suitable flowmeter.
What medium to measure
Measure the temperature of the medium, medium density, viscosity, etc. 3.Measuring medium: pressure.
Measure the minimum flow rate of the medium, the common flow rate and the maximum flow rate
Measure the pipe diameter
Requirements for instrument power supply and output signal
Requirements for meter display and measurement accuracy
Whether there is a signal interference source at the installation site, and whether it meets the conditions for on-site installation of the flowmeter
The user gives the above parameters, Sino-Inst, as a manufacturer of flow meters, can select a suitable flow meter for you. Below we introduce the above several common flow meters are usually used in which medium measurement.
Petrol flow meters are often used for inline monitoring of gasoline flow rates. Positive displacement & Turbine flow meters are commonly used industrial fuel flow meters. Sino-Inst offers a variety of petrol flow meter for flow measurement. If you have … Continue reading →
Cheap flow meters means to choose the lowest cost flow meter while satisfying your measurement needs. How to choose the lowest cost flow meter? Cheap flow meters are not equal to any flow meter. Different flowmeters are required to measure … Continue reading →
Oxygen Flow Meters are digital flow meters that can measure industrial oxygen. It is very important to choose a suitable flow meter to measure and monitor the oxygen flow. Sino-Inst offers a variety of Industrial Oxygen Flow Meters for flow … Continue reading →
CO2 flow meters are instruments that can measure the flow of gaseous or liquid carbon dioxide. CO2 is a common industrial gas, and effective measurement is very important. Sino-Inst offers a variety of CO2 flow meters for flow measurement. If … Continue reading →
Biogas Flow Meters are instruments that can measure the flow of biogas. Could be a vortex flow meter, thermal mass flow meter, etc. Commonly used in biogas stations, biogas production fermentation tanks, etc. Sino-Inst offers a variety of Biogas Flow … Continue reading →
Sino-Inst offers a variety of Digital Beer Flow Meters for flow measurement. If you have any questions, please contact our sales engineers. Featured Beer Flow Meters for Sale More about: Sanitary Flow Meters for Sale The Use of Beer Flow … Continue reading →
LPG flow meter is used for flow measurement of liquefied petroleum gas. The flow measurement of LPG is very important in industrial production, transportation and trade settlement. Sino-Inst offers LPG/propane gas flow meter at competitive low price from China gas … Continue reading →
Wet Gas Flow Meter is an instrument used to measure industrial wet gas flow. Such as wet air, wet gas and wet chlorine, etc. Sino-Inst offers a variety of Wet Gas Flow Meters for flow measurement. If you have any … Continue reading →
Featured Inline Propane Flow Meter Propane is also generally referred to as liquefied petroleum gas (LPG). So what is the difference and connection between propane and LPG? Next, let’s take a look together. Propane VS LPG Because propane is one … Continue reading →
Featured Inline Air Flow Meters Inline air flow meter units conversion Inline air flow meter cfm CFM is a common imperial flow unit, cubic feet per minute.For a certain volume of air flow passing in a unit time, m3/h air … Continue reading →
Clamp on flow meters refers to the non-contact flow meter, or strap-on flow meters, which clamps the ultrasonic sensor outside the pipeline for measurement. Sino-Inst offers a variety of Clamp on flow meters for flow measurement. If you have any … Continue reading →
Cryogenic Flow Meters for Highly Accurate and Reliable Cryogenic Fluids Flow Measurement. Sino-Inst offers a variety of Cryogenic Flow Meters for Cryogenic fluids flow measurement. If you have any questions, please contact our sales engineers. Featured Cryogenic Flow Meters Cryogenic … Continue reading →
Common sanitary flow meters are sanitary magnetic flow meters and sanitary turbine flow meters. Composed of 304/316 stainless steel. A Sanitary flowmeter with Tri-Clamp fittings is easier to install and disassemble. Suitable for the food hygiene industry. Sino-Inst offers a … Continue reading →
Sino-Inst’s Microflow meters for low flow liquids, made in China, Having good Quality, With better price. Our flow measurement instruments are widely used in China, India, Pakistan, US, and other countries.
Wu Peng, born in 1980, is a highly respected and accomplished male engineer with extensive experience in the field of automation. With over 20 years of industry experience, Wu has made significant contributions to both academia and engineering projects.
Throughout his career, Wu Peng has participated in numerous national and international engineering projects. Some of his most notable projects include the development of an intelligent control system for oil refineries, the design of a cutting-edge distributed control system for petrochemical plants, and the optimization of control algorithms for natural gas pipelines.
Clamp on flow meters refers to the non-contact flow meter, or strap-on flow meters, which clamps the ultrasonic sensor outside the pipeline for measurement.
Clamp on flow meters installs the sensor clamp outside the pipe. No changes to the pipeline are required. The measurement is simple and flexible. Used for small to large pipe diameters. Clamp on flow meters can be installed permanently, or portable, hand-held, etc.
Sino-Inst offers a variety of Clamp on flow meters for flow measurement. If you have any questions, please contact our sales engineers.
With powerful magnets, when measuring steel pipes and cast iron pipes, you only need to attach the sensor to the outer wall of the pipe.
High temperature sensor with high temperature resistant strong magnet, when measuring steel pipe and cast iron pipe, only need to attach the sensor to the outer wall of the pipeline.
Equipped with a ground wire terminal, it can be used in occasions with strong electromagnetic interference.
It can be fixed by steel belt, steel wire rope, tension belt and special clamp.
The upper cover of the sensor marked the emission direction of the ultrasonic signal.
After the junction box is filled with glue, the protection level can reach IP68.
Complete specifications, divided into three types of large, medium and small, measuring pipe diameter range DN15~DN6000mm, temperature range: -40~90℃. -40~160℃.
According to different uses, standard clamp-on sensors are divided into two categories: portable and fixed.
Portable clamp-on flow meters refer to the host form of clamp-on flow meters.
Of course, the host of Clamp-on flow meters can be portable, hand-held, and permanently fixed.
A handheld ultrasonic flow meter realizes the non-contact measurement of liquid flow. Also often referred to as Portable Clamp-On Ultrasonic Flow Meter for Liquids.
Handheld Ultrasonic Flow Meter ( Model:2000H) has been successfully applied to measurement work in various industries. The measuring range is 20-6000mm (0.5-20 inches). A non-contact measurement method is adopted. Flexible operation and easy to carry. Conductive or non-conductive, corrosive or non-corrosive liquids can be measured. Various fluids: water, pure water, sewage, seawater, chemical fluids, river water, fuel Oil, etc. can be measured.
Handheld Ultrasonic Flow Meter Reference price: USD 470.00/pc
Strap-on flow meter X3 is a kind of ultrasonic external clamp-on flow meter. Strap on flow meter X3 is easy to install. Suitable for measuring pipe diameter Φ9.53~Φ90.
Strap on flow meter X3 can meet the needs of different pipe materials: stainless steel pipe, carbon steel pipe, copper pipe, plastic pipe, PVC, PVDF, PPH, PPE, etc.
Strap on flow meter X3 almost meets the measurement of different clean fluids: various acids, alcohols, chemical solvents, alcohol, drinking water, Coca-Cola water… etc.
Advantages of Clamp-on flow meters to measure water:
This is the most obvious difference between the clamp-on ultrasonic flowmeter and the electromagnetic flowmeter. The clamp-on ultrasonic flowmeter is not affected by the conductivity of the fluid. It can accurately measure pure water or other fluids with low conductivity that cannot be measured by electromagnetic flowmeters.
The accuracy of the clamp-on ultrasonic flowmeter fully meets the measurement requirements. The accuracy is usually ±1%, and ±0.5% after correction.
The external clamp ultrasonic flowmeter has a measuring probe outside the pipe wall. It is tightly connected to the pipe wall through a coupling agent. It is not in direct contact with the measured medium. There is no baffle, and its operating life can be well guaranteed.
Strong anti-interference ability. The power supply has a wide range to meet the needs of the site.
The external clamp type ultrasonic flowmeter is also very convenient to install. Just install the external clamp sensor on the outer pipe to avoid cutting off the pipe and polluting the demineralized water.
The gas ultrasonic flowmeter can not only measure high-pressure gas, but also measure atmospheric gas, including gas in steel pipe, which was a worldwide technical problem before.
For example air, argon, carbon monoxide, ethane, ethylene, helium, hydrogen, natural gas, nitrogen, nitrous oxide, oxygen, process gas, propane, saturated steam, acid gas, etc.
Clamp-on flow meters can be installed on new or existing pipes and sit on the outside of the pipe. This saves time and money since no cutting into the pipe is required.
Clamp on Ultrasonic Flow Meter adopts the measurement principle of time difference method. It uses the ultrasonic wave emitted by the sensor to propagate in the flowing fluid. The sound wave propagation speed in the downstream direction will increase, and the backward direction will decrease. In the same propagation distance, there will be different transmission times. According to the difference between the transmission time and the measured The relationship between fluid velocity measures the fluid velocity. The flow rate of the fluid is different in different positions in the tube. The flow rate in the center of the tube is faster than the flow rate near the wall of the tube. The flow velocity distribution of the fluid in the pipeline can be represented by the flow velocity cross-sectional distribution diagram. By setting the flowmeter and considering the cross-sectional distribution of the flow velocity, the average flow velocity can be calculated. Then the volume flow of the fluid can be obtained according to the cross-sectional area of the pipe. Notes: V measure fluid velocity M ultrasonic reflection times D pipe diameter θ The angle between the ultrasonic signal and the fluid T up The time when the downstream sensor transmits the signal to the upstream T down Time from upstream sensor to downstream ΔT = T up – T down
Ultrasonic flowmeters use sound waves to determine the velocity of a fluid flowing in a pipe. At no flow conditions, the frequencies of an ultrasonic wave transmitted into a pipe, and its reflections from the fluid are the same. Under flowing conditions, the frequency of the reflected wave is different, due to the Doppler effect. When the fluid moves faster, the frequency shift increases linearly. The transmitter processes signals from the transmitted wave, and its reflections to determine the flow rate.
Sino-Inst, Manufacturer for Ultrasonic Flow Meters. It can measure a single sound-conducting liquid medium of DN 15—6000mm. It can measure even liquids such as water, seawater, oil, and slurry.
Sino-Inst’s Ultrasonic Flow Meter, made in China, Having good Quality, With better price. Our flow measurement instruments are widely used in China, India, Pakistan, the US, and other countries.
Wu Peng, born in 1980, is a highly respected and accomplished male engineer with extensive experience in the field of automation. With over 20 years of industry experience, Wu has made significant contributions to both academia and engineering projects.
Throughout his career, Wu Peng has participated in numerous national and international engineering projects. Some of his most notable projects include the development of an intelligent control system for oil refineries, the design of a cutting-edge distributed control system for petrochemical plants, and the optimization of control algorithms for natural gas pipelines.
How to choose a Hydrogen flow meter?Hydrogen is a valuable and widely measured industrial gas. Custody transfer metering is a very important feature of hydrogen flow measurement.
Common gas flow meters include thermal mass flow meters, vortex flow meters, precession vortex flow meters, and gas ultrasonic flow meters. How to select a hydrogen flow meter? Next, we will discuss in detail.
Sino-Inst offers a variety of Hydrogen flow meters for flow measurement. If you have any questions, please contact our sales engineers.
Hydrogen (chemical formula H2) consists of two hydrogen atoms, which is colorless, tasteless, odorless, non-toxic, and flammable. With a molecular weight of 2, and a specific gravity of 0.0695, hydrogen is considered the lightest gas, more than 14 times lighter than air (mv=28.8).
Hydrogen is very flammable. Under normal pressure, a mixture with a hydrogen content of 4.0% to 74% can be flammable. Since the minimum ignition energy of hydrogen (0.02mJ—one order of magnitude smaller than the minimum ignition energy of hydrocarbons) is very small, strict precautions must be taken to prevent leakage.
The most preferred hydrogen flow meter
Thermal Mass Flow Meter can directly measure the mass flow of various gases. Unaffected by changes in viscosity, density, temperature, or pressure.
At present, the Coriolis mass flowmeter and thermal gas mass flowmeter are the most reliable and the most reliable hydrogen flow measurement applications. Both of these are flow meters for direct mass flow measurement, and neither have movable parts and have a large range. The fluid contact surface is made of 316L, which improves the durability and safety of field application.
The sensors of Coriolis mass flowmeter and thermal gas mass flowmeter are all welded. Because the pressure sensor interface and temperature sensor are not required to correct the flow reading to the volume flow under the standard state. Therefore, the system pipe joint used Be reduced to a minimum.
The sensor connection method has flange connection, flange to clamp connection, thermal gas mass flowmeter can also provide large pipeline plug-in connection.
Coriolis mass flowmeters and thermal gas mass flowmeters can provide up to 0.5% accuracy due to their excellent detection technology, which has huge advantages in trade settlement and measurement.
These two types of flow meters have advanced measurement technology, good long-term application stability, and extremely low on-site maintenance costs. They are very popular measuring instruments.
The shortcomings of Coriolis mass flow meters: large pipe diameters are bulky, inconvenient to install, and extremely expensive to purchase. It is inferior to the thermal gas mass flowmeter in the small flow measurement characteristics.
Disadvantages of thermal gas mass flow meters: the high flow rate range is not as good as Coriolis mass flow meters. In order to accurately measure the hydrogen flow rate, it is necessary to use real flow calibration for the flow meter calibration.
Hydrogen flow meter—Precession Vortex Gas Flowmeter
Precession vortex flowmeter is a new type of gas flowmeter. It can be used for the measurement of natural gas, propane, air, nitrogen and other gases.
Precession Vortex Gas Flowmeter, like vortex flowmeter, is a velocity flowmeter. The cost performance of the intelligent precession vortex flowmeter is higher than vortex flowmeter. The intelligent precession vortex flowmeter can only measure gas. Precession Vortex Gas Flowmeter can be made into an integrated temperature and pressure compensation. And can measure various gases. Such as compressed air, oxygen, biogas, natural gas, coal gas, etc.
Precession Vortex Gas Flowmeter reference price: DN50, USD 600.00/pc.
It is mainly used for flow measurement of industrial pipeline medium fluid, such as gas, liquid, vapor and other media. Its characteristics are small pressure loss, large measuring range and high accuracy.
When measuring the volume flow under working conditions, it is hardly affected by the fluid density, pressure, temperature, viscosity and other parameters. There are no movable mechanical parts, so the reliability is high and the maintenance is small. The instrument parameters can be stable for a long time.
The gas turbine flowmeter is a new generation of high-precision and high-reliability gas precision metering instrument developed by itself by absorbing the advanced technology of domestic and foreign flow meters, optimized design, and integrated theories of gas mechanics, fluid mechanics, and electromagnetics.
It is a high-range ratio differential pressure flow device that is composed of a standard orifice plate and a multi-parameter differential pressure transmitter (or a differential pressure transmitter, a temperature transmitter, and a pressure transmitter).
It can measure the flow of gas, steam, liquid and natural gas, and is widely used in process control and measurement in the fields of petroleum, chemical industry, metallurgy, electric power, heating, and water supply.
V cone flowmeter:
V-cone flowmeter is widely used in petrochemical, natural gas and other fields due to its simple structure, firmness, easy duplication, strong versatility, and low price.
This product overcomes the standard orifice plate, venturi tube, nozzle and other throttling devices, such as easy to wear, large pressure loss, small range (range ratio), high on-site installation conditions, and excessively long straight pipe sections. It can accurately measure the flow rate of various fluids in a wide range of Reynolds number.
Sino-Inst offer over 5 Hydrogen flow meters with Best Price.
A wide variety of Hydrogen flow meters options are available to you, such as free samples, paid samples.
Sino-Inst is Hydrogen flow meters suppliers, located in China. Mass Flow Meters products are most popular in North America, Mid East, and Eastern Europe. The United States, and India, which export 99%, 1%, and 1% of Hydrogen flow meters respectively.
Wu Peng, born in 1980, is a highly respected and accomplished male engineer with extensive experience in the field of automation. With over 20 years of industry experience, Wu has made significant contributions to both academia and engineering projects.
Throughout his career, Wu Peng has participated in numerous national and international engineering projects. Some of his most notable projects include the development of an intelligent control system for oil refineries, the design of a cutting-edge distributed control system for petrochemical plants, and the optimization of control algorithms for natural gas pipelines.
Liquid level float switch is a commonly used liquid level controller. For water Tank & Pump alarm and level control. Can be divided into Continuous Float Level Sensor and Point Level Float Switch.
Liquid level float switch are sensors with an electrical contact output at a specific liquid level. Floats with permanent magnets. Single or multi point level indicator. Can choose stainless steel or anti-corrosion material. It is suitable for exploratory testing of the limit of liquid in small containers (boxes, barrels, cylinders, etc.).
Sino-Inst offers a variety of Liquid level float switches for level measurement and control. If you have any questions, please contact our sales engineers.
Liquid level switch, also known as water level switch, liquid level sensor. As the name implies, it is a switch used to control the liquid level.
In terms of form, it is mainly divided into contact type and non-contact type.
Commonly used non-contact switches include capacitive liquid level switches, and contact float-type liquid level switches are the most widely used. Electrode liquid level switches, electronic liquid level switches, and capacitive liquid level switches can also be realized by contacting methods.
Continuous Float Level Sensor
The floating ball continuous level gauge uses the floating ball to move up and down with the liquid to trigger or release the reed switch in the tube, and output 4-20mA or other different standard models through circuit processing.
With multi-interface measurement, easy to install, and corrosion-resistant, it can meet most measurement needs. Suitable for various tanks and tank level measurement, optional on-site display.
Point Level Float Switch
The float level switch uses a magnetic float to rise or fall with the liquid level. The sensor detects the reed switch chip at the set position in the tube, and sends out a contact opening (closing) conversion signal.
One or more dry reed pipes are installed in the closed non-magnetic pipe. Then the pipe passes through one or more hollow floats with ring magnets inside. The rise or fall of the liquid will drive the floating ball to move up and down together. Then the reed tube in the non-magnetic tube will pull on or off, and then output a switch signal.
According to needs, one or more liquid level switch points can be set.
Whether it is Continuous Float Level Sensor or Point Level Float Switch, they all need to be in contact with the medium.
However, in some cases, we need to measure and control the liquid level without contacting the medium. Then we can consider the following liquid level sensors.
Liquid level float switches are liquid level controllers that use one maglev ball or multiple maglev balls to send out multi-point switch signals. Reed pipes are installed at different heights in the guide rod. When the maglev ball floats up and down as the liquid level changes. The magnetic steel in the floating ball makes the reed pipe at the corresponding position in the guide rod pull on or off, and send out a switch signal.
The explosion-proof float level switch is also called the explosion-proof float level controller. It is a liquid level control instrument specially designed and manufactured for use in explosive environments. Explosion-proof type ExdⅡBT4; intrinsically safe type ExiaⅡCT6.
Principle of explosion-proof float level switch:
①The mechanical strength conditions of the enclosure. That is, the shell has enough strength to withstand the internal explosion pressure without damage. And it does not produce permanent deformation that affects the explosion-proof performance.
②Control the conditions of non-detonation in the gap of the joint. That is, the shell joint surface has a sufficiently small gap and a sufficiently long engagement length. Explosive products (hot flames or particles) inside will not escape the shell and ignite the explosive mixture in the surrounding environment.
The principle of intrinsically safe explosion-proof technology is to start with limiting energy and reliably limit the voltage and current in the circuit to an allowable range. In order to ensure that the electric spark and thermal effects generated by the instrument in normal operation or short-circuit and component damage, etc., will not cause dangerous gases that may exist around it. It is actually a low-power design technique.
Multi level float switch is a custom multi point float level sensor & switch. These versatile level switches are available in many materials. Like: Stainless Steel, Brass & Buna, PVC, Polypropylene or PTFE and can be ordered with an integrated temperature sensor. Use these multi-level float switches with a tank level alarm or liquid level control relay for a turnkey solution. Explosion-proof available.
Vertical liquid level float switch refers to the float level switch installed in the vertical direction. It is usually installed on the top of the tank through flanges or threads. Keep it vertical.
Horizontal liquid level float switch refers to a float level switch installed from the horizontal direction, or from the side.
Float switches for water tanks
In water treatment, the float level switch of the water tank is directly related to the safety and reliability of the entire process.
In a process, there are different types such as intermediate water tank, backwash water tank, produced water tank and waste liquid tank. The sizes of these boxes are different. The volume of the produced water and the original water tank may be larger.
In these water tanks, the water tank float level switch is used for related control. Different liquid level switches will have different actions. However, it is not necessary to have several level switches in a large water tank.
In the water tank, there are high and low level switches. The high level switch can detect if the water tank is full. If it is full, stop producing water. The low level switch is used to detect whether the water in the tank is sufficient. If there is not enough water, no more water can be sent out.
FAQ
What is float level switch?
The float level switch is a kind of level switch. The float level switch uses magnetic force to operate. No mechanical connections. The operation is simple and reliable. When the float switch floats the measured medium, the float moves the main body. At the same time, the magnet on the other end of the float will control the magnet on the switch action lever.
What is a liquid level switch?
Liquid level switch, also known as water level switch, liquid level sensor. As the name implies, it is a switch used to control the liquid level.
How does a float level sensor work?
Float level sensor: Float level sensor is designed and produced based on the principle of buoyancy and static magnetic field. The position of a floating ball with a magnet (floating ball for short) in the measured medium is affected by buoyancy. The change of the liquid level causes the position of the magnetic float to change. The role of the magnet and sensor (reed switch) in the floating ball changes the number of components (such as fixed resistance) connected in series to the circuit. Thereby changing the electrical quantity of the instrument circuit system. That is, changes in the position of the magnetic float cause changes in the electrical quantity. The change of the electrical quantity is detected to reflect the liquid level in the container. The float level sensor is installed on the top of the container through a connection flange. The float ball floats on the liquid surface according to the principle of discharging the liquid volume phase and so on. When the liquid level of the container changes, the float ball also moves up and down. The reed switch of the ball level gauge is magnetically attracted to change the position of the liquid level into an electrical signal. The actual position of the liquid is displayed digitally by the display instrument. The floating ball level gauge can achieve long-range detection and control of the liquid level.
How do I test a float switch with a MultiMeter?
Turn on the power of the multimeter and set the multimeter to the continuity test position. The test multimeter displays 1, indicating that the test leads are disconnected. Place the pointer of the multimeter, one wire is gently placed on the wire-in end of the switch terminal, and the other wire is lightly placed on the wire-out end of the switch terminal. If the display is 0, it means that the two terminals are connected to the normal terminal. close. At this time, we keep the terminal still, slightly press the micro switch, and observe the universal indicator at this time, it becomes 1, which means that the switch is connected to the line, indicating that the micro switch is normal. In the same way, we test the other two wiring terminals of the micro switch, as shown in the figure: When no pressure is applied to the micro switch, the display is 1, indicating that the two terminals are normally open.
Sino-Inst offers over 10 Liquid level float switches – Single and Multipoints for level measurement. About 50% of these are float liquid level meters, 40% is the level switches.
A wide variety of Liquid level float switches – Single and Multipoints options are available to you, such as free samples, paid samples.
Sino-Inst is a globally recognized supplier and manufacturer of Liquid level float switches – Single and Multipoint instrumentation, located in China.
Wu Peng, born in 1980, is a highly respected and accomplished male engineer with extensive experience in the field of automation. With over 20 years of industry experience, Wu has made significant contributions to both academia and engineering projects.
Throughout his career, Wu Peng has participated in numerous national and international engineering projects. Some of his most notable projects include the development of an intelligent control system for oil refineries, the design of a cutting-edge distributed control system for petrochemical plants, and the optimization of control algorithms for natural gas pipelines.
Hot Water Flow Meters Improve Heating-Boiler System
Hot water flow meters refer to flow meters that can measure and indicate the flow of high temperature water. Hot water is widely used in industry and civil use. Such as heating systems, baths, boilers, industrial indirect heating, heat transfer, etc. There are many types of water flow meters. Some of the most common types include electromagnetic flow meters, turbine flow meters, and vortex flow meters. These meter types have unique features that distinguish them from each other. According to the function of the hot water flow transmitter and the user’s budget. You can choose a suitable flow meter to monitor the hot water pipeline.
What are the characteristics of hot water flow measurement? Let’s take a look.
The temperature of the measured fluid is not very high. When the flow meter is installed at the entrance of the heat exchanger body. The temperature of the fluid is generally not higher than 140°C. When the liquid outlet of the heat exchanger is installed, the flow temperature is lower.
The measured fluid pressure is not very good either. In order to send hot water to the highest floor in the building heating system, the pressure is sometimes higher. In the ground heating system, the highest pressure is 1MPa.
The pipe diameters vary in size. The smallest user, the pipe diameter is only DN20~DN40. The large-diameter flowmeter sometimes reaches about 1m.
Better cleanliness. Hot water is not as clean as tap water. The solid matter in the single water and its viscosity will not have a big impact on the general flowmeter.
Corrosive. Fresh water does not corrode the flowmeter. However, geothermal water has a certain degree of corrosion. Because it contains chloride ions and so on. Ordinary stainless steel materials are corroded, and the higher the fluid temperature, the more severe the corrosion.
The requirement for scope is not high. The pumps used in power plants (stations) to deliver hot water are generally combined in size. When the hot water supply is at its maximum, usually several large pumps are opened. When the heat supply is the smallest, generally only a small pump is turned on. The ratio of the maximum flow rate to the minimum flow rate is about 5~10. A flow meter for heat measurement of a single user. In the heating season, the flow measurement range of up to 10 can meet the demand. After the hot water valve is turned off, the market value of the flow should be 0.
Hot water is the most widely used heat carrier liquid. Due to the difference in use and design, the water supply temperature is commonly used in several grades such as 60℃, 90℃, and 130℃. There are fresh water and geothermal water in the varieties of water. The temperature of geothermal water cannot be determined independently, but it must be above 60°C to have use-value. Flow Meter Selection Guide 101: Find the Perfect Fit for Your Application
Magnetic Water Flow Meter provide highly accurate flow measurements for a wide variety of conductive fluid applications. Magnetic Water Flow Meter is a volumetric flow meter that measures liquids or liquid slurries that have a minimum conductivity of 5 µS/cm.
An electromagnetic flowmeter is an ideal instrument for hot water flow measurement. Its significant advantages are as follows.
The pressure loss is negligible. Because the inner diameter of the measuring pipe is the same as that of the pipe.
From small to large caliber, the series is complete.
The measurement accuracy is high, and the high accuracy can still be achieved when the flow rate is very low.
The temperature grade can meet the needs. Among them, the temperature resistance rating of 120°C can meet the measurement needs of most objects. The temperature resistance rating of 180°C can meet the needs of measurement objects with fluid temperatures higher than 120°C.
The pressure level can meet the measurement needs. In the electromagnetic flowmeter product sample, the pressure level of the finalized large-caliber electromagnetic flowmeter can only reach 0.6-1MPa. But it can be used as a special order to meet the requirements of objects with higher pressure.
Corrosive series products. Geothermal hot water has different corrosive properties due to different production areas. For geothermal hot water containing chloride ions, electromagnetic flowmeters with PTFE lining and titanium electrodes have met the needs.
Strong adaptability to the vibration of the pipeline and the environment.
It can measure pulsating flow with low pulsating frequency.
The turbine flow meter for hot water can measure soft water, soft water and RO water. These are the main water types best suited for turbine flow meters. The maximum hot water temperature of the turbine flowmeter is 150 degrees Celsius.
Turbine flowmeters are based on the principle of torque balance and belong to velocity flow meters. It is widely used in petroleum, chemical, metallurgy, water supply, papermaking and other industries. It is an ideal instrument for flow measurement and energy saving.
High accuracy. Generally up to ±1%R, ±0.5%R, high-precision type up to ±0.2%R;
The repeatability is good, and the short-term repeatability can reach 0.05%~0.2%. It is because of the good repeatability, such as frequent calibration or online calibration can get extremely high accuracy. It is the preferred flowmeter in trade settlement;
Output pulse frequency signal. Suitable for total measurement and connection with computer. No zero drift, strong anti-interference ability;
High frequency signals (3-4kHz) can be obtained. Strong signal resolution;
Wide range, medium and large diameters can reach 1:20, and small diameters are 1:10;
The structure is compact and light. It is convenient to install and maintain, and has a large circulation capacity;
Suitable for high-pressure measurement. No holes are required on the meter body, so it is easy to make a high-pressure meter;
There are many types of sensors. Various types of sensors can be designed according to the special needs of users, such as low temperature type, two-way type, downhole type, sand mixing type, etc.;
It can be made into a plug-in type, suitable for large-caliber measurement. The pressure loss is small, and the price is low.
Use a vortex flowmeter to measure hot water. The pipe diameter of the boiler feed water is below 300mm, which is exactly the pipe diameter range of the full-tube vortex flowmeter. Different from measuring steam, when measuring hot water, the installation of vortex flowmeter should ensure that the pipe is full and there is no air. The horizontal installation is suitable for the lowest point. When vertical installation, the hot water should flow from bottom to top. Inaccurate.
Features of measuring hot water flow with vortex flowmeter:
The temperature of the hot water is not very high, and the maximum temperature does not exceed 140 ℃;
The cleanliness of hot water is relatively high, and the water does not contain solid matter;
The water contains chloride ions, which is corrosive to ordinary steel. And as the water temperature rises, the corrosiveness increases;
The maximum pressure of hot water used in the heating system is 1MPa. The pressure used for water is higher, about several megapascals;
The pipe diameters vary. The pipe diameter of the boiler water supply pipe is 50~300mm. The pipe diameter of the heating system is quite different. The smallest pipe diameter is 20-40mm, and the largest pipe diameter can reach 1000mm.
The flow range ratio is about 5:1~10:1.
The adaptability of ultrasonic flowmeter is incomparable to other types of testing instruments. It has been made into a basic type, high temperature type, explosion-proof type, and wet test type instrument panel with different sound channels to incorporate different substances, different places and different Pipeline standard flow measurement.
On the large-diameter pipes of the power plant (station), the orifice plate is still used to measure the flow of water supply and the amount of return water.
Mainly take the following advantages:
The orifice itself has high reliability. The heating will not be interrupted due to the orifice plate.
Convenient verification. The orifice plate only needs to be verified by geometric method. It is not necessary to send the verification center to the standard device for real flow calibration like some flow sensors and transmitters.
When the caliber is large, the investment is relatively low.
Its biggest shortcoming is the large pressure loss, which is not conducive to saving power.
Commonly used flow meters have three forms: current output, voltage output, and pulse output.
Among them, the current output and the voltage output signal of the instrument are in line with the International Electrotechnical Commission (IEC) standard. There is currently no standard for the pulse output signal of the instrument.
The flowmeter with pulse output, its output is a pulse signal proportional to the flow rate. Compared with the analog signal of voltage and current, the pulse signal is convenient for remote transmission without reducing the accuracy, and there is no zero drift. It is easy to connect with the computer, easy to carry out cumulative display and has a strong anti-interference ability.
There are many types of flow meters for measuring water.
Common ones are V cone flowmeter, electromagnetic flowmeter, metal rotor flowmeter, vortex flowmeter, liquid turbine flowmeter, ultrasonic open channel flowmeter, ultrasonic flowmeter, etc.
At present, electromagnetic flowmeters and turbine/vortex can solve most of the working conditions.
Sino-Inst offers over 30 water flow meter products. About 50% of these are differential pressure flow meters. 40% are water meters (like the Insertion Turbine Flow Meter), and 40% are water treatment (like the Annubar flow meter ).
A wide variety of water flow meter options are available to you, such as free samples, paid samples.
Sino-Inst is a globally recognized supplier and manufacturer of water flow meters, located in China.
The top supplying country is China (Mainland), which supply 100% of the water flow meter respectively.
You can ensure product safety by selecting from certified suppliers, with ISO9001, ISO14001 certification.
Wu Peng, born in 1980, is a highly respected and accomplished male engineer with extensive experience in the field of automation. With over 20 years of industry experience, Wu has made significant contributions to both academia and engineering projects.
Throughout his career, Wu Peng has participated in numerous national and international engineering projects. Some of his most notable projects include the development of an intelligent control system for oil refineries, the design of a cutting-edge distributed control system for petrochemical plants, and the optimization of control algorithms for natural gas pipelines.
Chemical Flow Meter is also known as chemical resistant flow meter. It is a flow meter used to measure common chemical fluid media. In chemical production control and metering, between chemical reaction storage tanks, or chemical raw material feed pipelines.
Sino-Inst offers a wide range of liquid and gas flow meters to help you regulate the flow of water, petroleum products, fuels, chemicals and more.
If you want to choose a suitable chemical flow meter, you must first understand the characteristics of the chemical raw materials you need to measure.
According to different forms, chemical raw materials can be divided into solid chemical raw materials, liquid chemical raw materials, and gas chemical raw materials. There are many liquid and gas chemical raw materials, and most of them are corrosive. Special attention should be paid to them during transportation and storage.
Common characteristics of chemical fluids that need to be considered when measuring flow rate:
Corrosive
This is the most common characteristic of chemical materials. Corrosive acid, alkali, salt solution.
Flammable and explosive
Compared with flammable liquids and solids, flammable gas is easier to burn, and the burning speed is fast, and it burns out. Gas composed of simple components is more flammable, the faster-burning rate has higher flame temperature and greater risk of fire and explosion than gas composed of complex components.
Electrified
Most flammable liquids are electrolytes. Such as crisps, ketones, gasoline, esters, aromatics, and petroleum products.
These substances are transported, poured, shaken, stirred, and flowed at high speeds in pipelines, storage tanks, tank trucks, and oil tankers.
Because friction is easy to generate static electricity, when the static charge accumulated to a certain extent, static sparks will be generated, which may cause burning and explosion.
Stickiness
Such fluids include glue, resin, asphalt, and molasses.
Gear Flow Meter – A New Choice for Chemical Liquids
Gear Flow Meters produced by Sino-Inst has high machining accuracy and precise installation. The rotation of the gear is scanned by non-contact. Each tooth produces a pulse. The resolution is very high. The cylindrical gear transmitter can measure very small flow. Quantitative small volume of liquid.
The new Gear Flow Meter made of PTFE is widely used in the chemical industry and laboratories. 98% nitric acid and sulfuric acid resistant to hydrofluoric acid. It has not been corroded after long-term continuous use.
The following will explain the flowmeters commonly used in the chemical industry.
Electromagnetic flowmeter. When a conductive fluid flows through an electromagnetic field, the velocity of the fluid can be obtained by measuring the voltage. The electromagnetic flowmeter has no moving parts and is not affected by the fluid. The accuracy of measuring conductive liquids when the tube is full is very high. The electromagnetic flowmeter can be used to measure the flow rate of the slurry fluid.
DP flowmeter can be used to measure the flow rate of most liquids, gases and steam. Positive displacement flow meter (PD). The PD flowmeter is used to measure the volumetric flow rate of liquid or gas. It introduces the fluid into the measuring space and counts the number of rotations. Impellers, gears, pistons or orifices are used to divert fluids.
Vortex flowmeter. The vortex flowmeter is to place a non-streamlined vortex generator in the fluid, and the speed of the vortex is proportional to the speed of the fluid to calculate the volume flow. The vortex flowmeter is suitable for measuring liquid, gas or steam. It has no moving parts and no fouling problem. The vortex flowmeter generates noise and requires the fluid to have a higher flow rate to generate the vortex.
Thermal mass flow meter. The fluid velocity is measured by measuring the increase in the temperature of the fluid or the decrease in the thermal sensor.
Coriolis flowmeter. This kind of flowmeter uses a vibrating fluid tube to produce a deflection corresponding to the mass flow rate for measurement.
Turbine flowmeter. When the fluid flows through the turbine flowmeter, the fluid causes the rotor to rotate. The rotation speed of the rotor is related to the speed of the fluid. From the average flow rate of the fluid felt by the rotor, the flow rate or total amount is derived.
Ultrasonic flowmeter. The propagation time method and the Doppler effect method are methods often used in ultrasonic flowmeters to measure the average velocity of the fluid. Like other speed meters, it is a meter that measures volume flow.
Electromagnetic flowmeters can measure the flow of general conductive liquids. It can also measure the volume flow of liquid-solid two-phase flow, liquid with high viscosity, strong acid, strong alkali, and salt liquid medium.
For chemical liquids, as long as they are conductive liquids, electromagnetic flowmeters can measure them.
But we need to choose the appropriate lining and electrode according to the characteristics of the chemical liquid. You can refer to the liner and electrode material usage table below.
Lining material selection：
Lining material
Linner
Main performance
Application
Diameter
Rubber
Neoprene(CR)
1. It has excellent flexibility. High tearing force. Good wear resistance. 2. Resistant to the corrosion of low-concentration acid, alkali, and salt media. Not resistant to corrosion by oxidizing media.
1. <60℃ 2. General water, sewage, mud and mineral slurry with weak abrasiveness
DN65~DN1600
Polyurethane Rubber(PU)
1. It has excellent wear resistance (equivalent to ten times that of natural rubber) 2. Poor acid and alkali resistance. 3. It cannot be used for water mixed with organic solvents.
1. <80℃ 2. Neutral and strong abrasion ore slurry, coal slurry, mud, etc.
DN25~DN500
Silicone rubber
1. It has excellent flexibility. High tearing force. Good wear resistance. 2. High temperature resistant non-corrosive medium.
1. <180℃ 2. Hot water
DN40~DN1600
Fluoroplastics
PTFE(F4)
1. It is a material with the most stable chemical properties in plastics. Can withstand boiling hydrochloric acid, sulfuric acid, nitric acid and aqua regia. It is also resistant to concentrated alkali and various organic solvents. Not resistant to the corrosion of chlorine trifluoride, high temperature oxygen trifluoride, high flow rate liquid fluorine, liquid oxygen, and ozone. 2. Poor wear resistance. 3. Poor anti-negative pressure ability.
1. <120℃ 2. Strong corrosive media such as concentrated acid and alkali 3. Sanitary medium
DN10~DN1600
Teflon F46(FEP)
1. The chemical properties are equivalent to PTFE 2. Tensile strength and abrasion resistance are better than PTFE 3. Can withstand high pressure resistance.
1. <180℃ 2. Corrosive acid-base salt 3. High pressure and negative pressure resistance
DN10~DN200
PFA
1. The chemical performance is equivalent to F46 2. Compressive and tensile strength due to F46
1. <180℃ 2. Corrosive acid-base salt 3. High pressure and negative pressure resistance
DN10~DN300
Electrode material selection:
Material
Medium
316L
Domestic water, industrial water, raw water, urban sewage, etc.
Hastelloy B (HB)
Sodium hydroxide ammonium hydroxide alkali solution and weak organic acid
Hastelloy C (HC)
Oxidizing salt solution (Fe+++, Cu++, seawater)
Titanium (Ti)
1. Salt solution (chloride, sodium salt, potassium salt, ammonium salt, sea water, etc.) 2. Alkaline solution (such as concentration less than 50% potassium hydroxide solution)
Tantalum(Ta)
1. Hydrochloric acid, sulfuric acid, oxidizing acid, aqua regia 2. Chlorine dioxide, ferric chloride, hypochlorous acid, sodium cyanide, lead acetate, etc.
Platinum (Pt)
Acid, alkali, salt solution
Tungsten carbide (WC)
Handled neutral industrial sewage and domestic sewage. Resistant to solid particle interference
Of course, in addition to electromagnetic flowmeters. To measure acidic media, oval gear flowmeters, vortex flowmeters, and turbine flow sensors made of acid-resistant materials can also be used. The parts in contact with the medium are made of acid-resistant materials, which can resist general acidic substances.
Such fluids include solvents, solutions, ethanol, diesel, and clean water.
Turbine flow meters are less expensive and usually have chemical flow sensors that have a compact design.
These flow meters are volumetric, meaning that they can measure liquids passing through them either indirectly or directly.
Some of the advantages of using turbine flow meters are that they have high accuracy, can measure high pressure, and have a large measuring range.
When the clamp-on ultrasonic flowmeter is working, the liquid does not directly contact the flowmeter. So it is suitable for various corrosive liquids. But its accuracy rate is relatively low.
Specifications of Slurry Flow Meter Benefits of Magnetic flow meter for slurry Working Principle…
Sino-Inst, Manufacturer for Chemical Flow Meters. These chemical flow meters are easy to use and install on hose ends, pumps or fluid transfer systems. These chemical flow meters are designed for today’s pesticides, fertilizers, and many other chemicals.
Each chemical flow meter has different measurement materials and different measurement characteristics. Compatible with other chemical liquids or oils.
Sino-Inst’s Chemical Flow Meters, made in China, Having good Quality, With better price. Our flow measurement instruments are widely used in China, India, Pakistan, US, and other countries.
If you are not sure which chemical flow meter is right for your measurement? Please feel free to contact our sales engineers. Based on years of experience in measuring chemical fluid flow, we will help you find the right chemical flow meter.
Wu Peng, born in 1980, is a highly respected and accomplished male engineer with extensive experience in the field of automation. With over 20 years of industry experience, Wu has made significant contributions to both academia and engineering projects.
Throughout his career, Wu Peng has participated in numerous national and international engineering projects. Some of his most notable projects include the development of an intelligent control system for oil refineries, the design of a cutting-edge distributed control system for petrochemical plants, and the optimization of control algorithms for natural gas pipelines.
Karman vortex air flow sensor is a commonly used flow meter for measuring air. Karman vortex air flow sensor is also called vortex shedding flow meter.
There are many types of instruments that can be used to measure air, but the actual air flow rate used in the field is divided according to its principles, and there are not many types. Karman vortex air flow sensor and Mass air flow sensor are two commonly used. Well.
Karman vortex air flow sensor uses airflow to bypass a cone and generate two rows of vortices downstream. The vortex frequency has a functional relationship with the intake air flow. An instrument that determines the air flow by detecting the frequency of the vortex by optical or ultrasonic methods.
The mass air flow sensor is a mass flow meter. Also called Thermal gas mass flow meters.
Thermal gas mass flow meters are instruments that use the principle of thermal diffusion to measure gas flow. The sensor is composed of two reference thermal resistance (RTD).
Thermal gas mass flow meter can measure air, nitrogen, carbon dioxide, methane, etc. A single component or a mixture of certain components. The flowmeter is generally verified with ammonia or air as the medium when it leaves the factory.
Through measuring frequency of turbulences behind an obstacle to reflect the velocity of the gas, so measures the actual volume flow of the gas .
Measures the mass flow of the gas via measuring the energy needed to keep a heated resistor at a constant temperature.
Temperature and Pressure Compensation
To calculate the standard volumetric flow , need temperature and pressure compensation . ( Requires temperature and pressure measurement additionally )
There is a fixed relationship between standard flow and mass flow (Be determined by the density of gas under standard condition ) , no need the temperature and pressure compensation.
Sensitivity
No response to the flow less than 4 m/s.
Can measures the flow small to 0 m/s.
Measure Ranges
4-75 m/s
0-224 m/s
Accuracy
±1.5%
±1~2.5%
Main factors affecting measurement accuracy
vibrate(a slight shaking can affect the measuring accuracy a lot)
The cleanliness of the measured gas (No long-term measurement behind the air compressor)
Repair and calibration
Can not install or uninstall under pressure, high cost of repair or calibration.
Can install or uninstall under pressure,low cost of repair or calibration.
The Karman vortex air flow sensor is widely used, gas, liquid, and steam can be measured.
The Mass air flow sensor can only measure gas;
Price:
Karman vortex air flow sensor is much cheaper;
Installation conditions:
The vortex flowmeter has requirements for the installation of the straight pipe section of the measuring pipeline, generally the first 10 and the back 5.
A true mass flow meter does not require temperature and pressure compensation for gas flow measurement. The measurement is convenient and accurate. The gas mass flow or standard volume flow can be obtained.
Wide range ratio, can measure gas with flow rate as high as 120Nm/s and as low as 0.1Nm/s. Can be used for gas leak detection.
Good seismic performance and long service life. The sensor has no moving parts and pressure sensing parts, and is not affected by vibration on measurement accuracy.
Easy to install and maintain. If site conditions permit, installation and maintenance can be achieved without stopping production. (Need special customization)
Digital design. Integral digital circuit measurement, accurate measurement and convenient maintenance.
Using RS-485 communication can realize factory automation and integration.
Oxygen, nitrogen, hydrogen, road gas and multi-component gas measurement.
The vortex flowmeter has the following advantages:
The output signal is not affected by the temperature, pressure, and density components of the fluid, and is directly proportional to the fluid flow rate.
The sensing element does not contact the medium and has high reliability.
No moving parts, simple and firm structure.
Wide measuring range and high precision.
The pressure loss is small and the energy saving is significant.
Sino-Inst’s air flow sensor offer reliable and accurate volume flow measurement in a large range of sizes and pressure rating while being fully compliant with international standards.
Sino-Inst is the risk-free choice for your gas flow measurement applications.
Sino-Inst’s air flow sensors, made in China, Having good Quality, With better price. Our flow measurement instruments are widely used in China, India, Pakistan, US, and other countries.
Wu Peng, born in 1980, is a highly respected and accomplished male engineer with extensive experience in the field of automation. With over 20 years of industry experience, Wu has made significant contributions to both academia and engineering projects.
Throughout his career, Wu Peng has participated in numerous national and international engineering projects. Some of his most notable projects include the development of an intelligent control system for oil refineries, the design of a cutting-edge distributed control system for petrochemical plants, and the optimization of control algorithms for natural gas pipelines.
Oil Level measurements are necessary to control the amount of oil in the tank and to prevent overflow. Oil Level measurements are very important in the process of oil and gas storage and transportation. We will analyze and introduce the automatic level measurement here. Hope to help you!
-In oil and gas production, especially in oil and gas gathering, transportation, storage, and transportation systems, oil, natural gas, and associated sewage must be separated, stored, and processed in various production equipment and tanks. The measurement and control of the level are essential to ensure normal production and equipment safety. Otherwise, a major accident will occur.
-For example, if the oil tank level measurement is not well controlled, there will be evacuated or oil spill “roofing” accidents. If the liquid level of the oil-air separator is too high or too low, “oil running” and “gas blow-by” accidents will occur. Seriously affect the production and safety of subsequent equipment;
-The high oil-water interface in the electric dehydrator will destroy the electric field. If it is low, it will carry oil in the water and affect production.
The Basic Concept of Level
Level—refers to the general term of the liquid level of the liquid medium, the level of solids or the level of particles in the container and the interface between two different liquid media.
Liquid level-the height of the liquid medium in the container
Material level-the accumulation height of solid or granular substances in the container
Interface level – the level of the interface of two immiscible liquids medium
According to the measurement method, it can be divided into continuous measurement and fixed-point measurement.
According to its working principle, it can be divided into the following types:
Direct reading type It measures the liquid level based on the principle of fluid connectivity.
Buoyancy type It measures the liquid level according to the principle that the height of the float changes with the height of the liquid or the buoyancy of the liquid to the float (or sinker) immersed in the liquid changes with the height of the liquid. The former is called constant buoyancy, and the latter is called variable buoyancy.
Differential pressure type (static pressure type) It measures the level according to the principle of the change in the static (differential) pressure generated at a certain point by the change in the height of the liquid column or the material accumulation.
Electrically, it measures the level based on the principle of converting level changes into various changes in electricity.
Nuclear radiation type It measures the liquid level based on the principle that when the nuclear radiation of the isotope rays penetrates the material, its intensity changes with the thickness of the material layer.
Acoustic It measures the level according to the changes in acoustic impedance and reflection distance caused by changes in the level
Direct measurement is one of the simplest and most intuitive measurement methods. It uses the principle of communicating devices. The liquid in the container is introduced into an observation tube with a ruler. Read the height of the liquid level by the ruler
Manual gauge level measurement is a basic method for measuring the volume and quality of liquids in various storage tanks.
It has the characteristics of simple operation, accurate measurement, and no auxiliary equipment. It is still the main measurement method in the crude oil gathering and transportation process of various oil fields.
When measuring with a gauge, first measure the height of the liquid level in the tank, and then calculate the volume and mass of the liquid in the tank according to the cross-sectional area of the tank or the large tank volume table.
The tool used by the gauge to measure is steel tape with a copper weight on the lower end. In order to facilitate the oil measuring operation, an oil measuring port is provided on the top of the tank. An oil measuring pipe is installed under the oil measuring port, and a hole is drilled at the bottom end of the pipe to communicate with the liquid. The purpose of setting the oil measuring pipe is to reduce the influence of the liquid level fluctuation in the tank on the oil measuring.
The magnetic flip level gauge has a firm structure, reliable work, and an eye-catching display.
Since the measured liquid is completely sealed and magnetic coupling transmission is used, it can measure high temperature, high pressure, and opaque viscous liquids, such as crude oil, sewage, etc.
The disadvantage is that after long-term use, the magnetism of the magnetic steel is degraded. Wear of the flap shaft can easily cause the wrong indication Therefore, it should be checked and corrected regularly.
The buoyancy method to measure the liquid level is based on the principle of force balance, usually with the help of floats. The float is made into a hollow rigid body so that it can float on the liquid surface when it is balanced. When the liquid level changes, the float will move up and down with the liquid level. Therefore, by measuring the displacement of the float, the amount of liquid level change can be known.
Float type level gauges can be divided into float type, float type, etc. according to different float shapes;
According to different institutions, it can be divided into steel belt type and lever type.
It is measured based on the pressure generated by the weight of the liquid.
Since the static pressure generated by the liquid on the bottom surface of the container is proportional to the height of the liquid level. Therefore, the liquid level can be calculated by measuring the pressure of the liquid in the container.
Ultrasonic level gauges use the propagation characteristics of waves in the medium.
Therefore, install an ultrasonic transmitter and receiver at the bottom or top of the container. The emitted ultrasonic waves are reflected at the phase interface. And it is received by the receiver. The time difference between ultrasonic wave transmission and reception is measured. The liquid level can be measured.
According to different working principles, the electrical method can be divided into resistive, inductive, and capacitive.
Using electrical methods to measure frictionless parts and movable parts, signal conversion and transmission are convenient. It is convenient for remote transmission, reliable work, and the output can be converted into a unified electrical signal. Used in conjunction with the electric unit combination instrument. Can easily realize automatic detection and automatic control of liquid level.
Radar level transmitters use radar technology to perform the non-contact continuous level measurement. The radar level indicator converts the level into an electrical signal. The level signal output can then be utilized by other instrumentation to monitor or control. Liquids and solids are commonly measured with this measuring technique. Like: Fly ash silo. Radar level sensors are divided into Pulsed radar technology and frequency modulated continuous wave (FMCW) radar level sensors.
The magnetostrictive liquid level sensor that uses the principle of magnetoelectric conversion for liquid level measurement is a new product launched in recent years.
Performance characteristics and selection of common oil tank level gauges
The intermediate tank only monitors parameters such as liquid level, temperature, and pressure (pressure storage tank) to prevent accidents such as roof capping and vacuuming of the oil tank. There is no need for handover monitoring and measurement;
The liquid level, temperature, density, volume, and quality of the medium in the trade tank must be monitored and measured frequently, and the accuracy is very high.
·For large tanks (10000~100000m3) and relatively large liquefied gas tanks, higher performance level gauges can be used, and general level gauges can be used for medium and small tanks;
High-precision level gauges should be used for trade tanks, and general level gauges can be used for intermediate tanks;
Medium characteristics
When storing high-viscosity media (such as heavy oil), try to use a level gauge that does not or has little contact with the measured medium. Such as radar type, ultrasonic type and magneto-induced level gauge, light oil can use general level gauge;
Actual needs of users
·If the user requires high measurement accuracy and low investment restrictions, a level gauge with good performance can be used. Under normal circumstances, the old tank area can be retrofitted or updated according to the use and maintenance of the original level gauge.
Radio Frequency (RF capacitive level transmitters)
Ultrasonic level transmitter
A tank level sensor is a level sensor used to measure the tank level. The liquid level is the level of the liquid in a sealed container (such as a water tank) or an open container (water tank). The instrument that measures the liquid level is called a liquid level sensor, a liquid level gauge, or a liquid level transmitter. The liquid level sensor is a kind of level instrument. Hydrostatic, Ultrasonic, Magnetostrictive, Radar, Differential Pressure are common choices for tank level measurement. Liquid level sensors have been around for decades for leak detection or level measurement. Commonly measured mediums are Water, Fuel, Diesel, Gasoline, diesel, liquefied gas, liquid ammonia, etc.
In the petrochemical industry in order for the crude oil process to run continuously and smoothly care has to be taken when storing raw and finished products. Delivery of the crude oil is via pipeline or ship and stored in a large tank until it is ready for final processing.
Accurate level measurement of products of distillation is essential whilst they are being stored in different sized tanks.
In the past, it was expensive as calibratable measuring devices were implemented for level measurement. Nowadays cheaper and low-maintenance measuring systems are used for small and medium-sized tanks. Products are now usually measured by calibratable flow meters while being moved.
Wu Peng, born in 1980, is a highly respected and accomplished male engineer with extensive experience in the field of automation. With over 20 years of industry experience, Wu has made significant contributions to both academia and engineering projects.
Throughout his career, Wu Peng has participated in numerous national and international engineering projects. Some of his most notable projects include the development of an intelligent control system for oil refineries, the design of a cutting-edge distributed control system for petrochemical plants, and the optimization of control algorithms for natural gas pipelines.
Liquid level measurement and monitoring play an increasingly important role. Liquid level measurement and monitoring directly affect the quality of the production process.
Liquid level measurement is required for process control in many industries. Use liquid level sensors for liquid level measurement. They are divided into two categories: point level measurement and continuous level measurement.
Sino-Inst offers a variety of Solutions for Liquid Level Measurement. If you have any questions, please contact our sales engineers.
This method is the simplest and oldest detection method, and the price is relatively cheap.
Mainly through the up and down movement of the float to detect the change of the liquid level. It is a mechanical detection, the detection accuracy is easily affected by buoyancy, and the repeat accuracy is poor. Different liquids need to be recalibrated.
It is not suitable for viscous or impurity liquids, which can easily cause blockage of floating balls. At the same time, it does not meet the application requirements of the food hygiene industry.
Tuning fork vibration measurement:
Tuning fork measurement is only a switch output and cannot be used to continuously monitor liquid height. The most representative one is the tuning fork level switch.
The principle is: when the two vibrating forks are filled with liquid or bulk material, the resonance frequency changes, and the switching signal is sent out depending on the detection frequency change.
It can be used to monitor the height of high-viscosity liquids or solid bulk materials, mainly for anti-overflow alarms, low-level alarms, etc. It does not provide analog output. In addition, in most cases it is necessary to install holes on the side of the container.
Ultrasonic measurement:
Since the principle is to calculate the liquid level by detecting the time difference between ultrasonic transmission and reflection, it is susceptible to the energy loss of ultrasonic propagation.
It has the characteristics of easy installation and high flexibility. Usually can be installed in high places for non-contact measurement. But when used in environments containing steam and powder, the detection distance will be significantly shortened. Therefore, it is not recommended to use it in a wave-absorbing environment with foam.
Its name has many different names in the industry, and it has the advantages of laser measurement. Such as: easy installation, calibration, flexibility, etc.
But it is better than laser detection, such as no need to repeat calibration and multi-function output. Suitable for all kinds of liquid level detection with foam. Not affected by liquid color.
It can even be applied to highly viscous liquids, with relatively little interference from the external environment. But its measuring height is generally less than 6 meters.
The laser sensor is based on the principle of optical detection and detects light by reflecting light from the surface of the object to the receiver. The light spot is small and concentrated, easy to install, calibrate, and flexible. It can be applied to continuous or limit alarm of bulk material or liquid level.
But it is not suitable for transparent liquids. Transparent liquids easily refract light, causing the light to not be reflected to the receiver. Use in foam or steam environment (cannot penetrate foam or easily interfered by steam), fluctuating liquid (easy to cause malfunction), vibration environment, etc.
Photoelectric refraction measurement:
This detection method emits a light source inside the sensor. The light source is totally reflected by the transparent resin to the sensor receiver.
But when encountering the liquid surface, part of the light will be refracted to the liquid. Therefore, the sensor detects the decrease in the amount of total reflected light to monitor the liquid level. The detection method is cheap and simple to install and debug. But it can only be applied to transparent liquids, and it only outputs switching signals.
Capacitive measurement:
Capacitive measurement mainly measures the height of the material level by detecting the change in capacitance value caused by the change of the liquid level or the height of the bulk material.
There are many types, including capacitive level gauges and capacitive proximity switches that can output analog quantities. Capacitive proximity switches can be installed on the side of the container for non-contact detection.
When choosing, it must be noted that capacitance sensors are easily affected by different container materials and solution properties. For example, plastic containers and hanging materials can easily affect capacitance sensors with analog output.
This measurement method uses a pressure sensor installed at the bottom. By detecting the bottom liquid pressure, the liquid level is converted and calculated. The bottom liquid pressure reference value is the atmospheric pressure connected to the top or the known pressure.
This measurement method requires the use of a high-precision, flush-type pressure sensor. At the same time, the conversion process requires continuous calibration.
Its advantage is that the detection is not limited by the height of the liquid level. But the higher the height, the higher the accuracy requirements of the sensor. Repeated calibration is required when using for a long time or changing liquid.
Differential Pressure Level transmitter for closed containers
For airtight containers, the inside is isolated from the atmosphere. When the process fluid fills or empties the tank, the pressure in the tank may change from positive pressure to vacuum. This change in tank pressure will directly affect the measured liquid level unless it is compensated for. This can be done by connecting the low-side pipe of the differential pressure transmitter to the top of the tank. Therefore, when measuring the liquid level of a closed tank, a differential pressure transmitter must be used.
The calculation method of the differential pressure range: the height of the liquid level to be measured (unit: m) × acceleration of gravity (9.8) × (the density of the measured medium-the density of the capillary filling liquid) (unit: g/cm3) = differential pressure range (unit: KPa).
The selection must know the measurement medium, measuring range, medium temperature, pressure, capillary length, the size and pressure rating of the process connection flange and the flange standard
If you need to measure river water level, open channel level, etc. The Ultrasonic Liquid Level Sensor can be used for non-contact continuous level monitoring.
Portable Ultrasonic Liquid Level Gauge
Portable ultrasonic liquid level indicator is best choice for tanks or pipes level measurement. It is designed to measure the presence or absence of liquid at a certain height position in a tank or in pipelines. Non-contact ultrasonic detection technology.
SI-ML works perfect for detection of dangerous toxic or corrosive liquids. Under ordinary conditions, the maximum wall thickness of measurable containers is 30mm. The product is suitable for the detection of various types of liquids. Liquids are non-crystalline or other particulate matter. For example CO2 Tank. Thanks to non-contact detection technology, this level indicator is ideal for detecting hazardous toxic or corrosive liquids.
Converter Tools used to convert and calculate liquid level values or for calculations that require liquid level measurement to obtain other measurement parameters. Help users choose suitable Level sensors and transmitters!
There are 7 main types of level transmitters that Sino-Instrument offers. Each type of transmitter works in a different way, and makes it useful for different types of processes.
Tank Level Measurement is important for industry storage tank. For example, level measurement of fuel oil tanks and the interface measurement of chemical storage tanks. The liquid level sensor is a kind of level instrument. Hydrostatic, Ultrasonic, Magnetostrictive, Radar, Differential Pressure are commonly choices for tank level measurement. Here, we mainly analyze the magnetostrictive liquid level sensor in the tank applications.
Liquid level sensor is a kind of measuring instrument used to measure the change of liquid level in the container. It can display the change of liquid level intuitively and linearly. Among them, the magnetic float level sensor is a kind of one that can display on-site and output analog signals. Kind of level gauge.
There are many types of level gauges. There are intuitive displays such as: glass plate level gauges, glass tube level gauges, etc. There are also magnetic float level gauges, float level gauges, radar level gauges, ultrasonic level gauges, Level gauges with electronic signals such as radio frequency admittance level gauges.
Wu Peng, born in 1980, is a highly respected and accomplished male engineer with extensive experience in the field of automation. With over 20 years of industry experience, Wu has made significant contributions to both academia and engineering projects.
Throughout his career, Wu Peng has participated in numerous national and international engineering projects. Some of his most notable projects include the development of an intelligent control system for oil refineries, the design of a cutting-edge distributed control system for petrochemical plants, and the optimization of control algorithms for natural gas pipelines.
Liquid Turbine Flow Meter is one of the most ideal flow meters for measuring liquids. Liquid Turbine Flow Meter is suitable for measuring low-viscosity media, such as water, diesel, gasoline, etc.
The Liquid Turbine flow sensor can measure the instantaneous flow rate and the total cumulative volume of the liquid, and can also quantitatively control the liquid. Turbine flow meters are velocity flow meters. The principle is to use the relationship between the rotational angular velocity of the impeller placed in the liquid and the liquid flow rate. Calculate the size of the liquid flow by measuring the speed of the impeller. The flow can be displayed on-site and can also be matched with the corresponding flow totalizer.
Sino-Inst offers a variety of Liquid Turbine flow meters for Liquid flow measurement. If you have any questions, please contact our sales engineers.
According to the different output signals, we divide the liquid turbine flowmeter into the following 4 categories.
A. On-site display type
The intelligent flowmeter is a new type of flowmeter display instrument designed with advanced single-chip microcomputer technology, and it is matched with the flow sensor (such as turbine, vortex) with pulse signal output.
Cumulative flow: 8 digits, 3 significant digits after the decimal point.
Instantaneous flow: six digits, can show the change per liter.
Display accuracy: ±1 display unit.
Signal output: pulse output: 1~3000Hz
External power supply +12~+24VDC
Current output: 4~20mA
External +24VDC power supply (two-wire system) built-in 2 3V lithium batteries in parallel for power supply.
When the voltage is lower than 2.7V, there will be an undervoltage indication, explosion-proof type.
Small signal removal function.
B. Pulse output type
Working voltage: +12VDC or +24VDC (the customer must select a power supply before ordering).
Signal transmission distance: less than 250 meters.
Output signal: square wave signal
Amplitude: +12VDC power supply amplitude is about 10V +24VDC power supply amplitude is about 20V
Installation: The connection between amplifier and turbine flow sensor is M16×1.5 thread. After the turbine flow sensor is installed, screw the amplifier to the turbine flow sensor. Tighten the lock nut until you feel the amplifier to the end.
Wiring: The pulse output type amplifier has three external leads, red wire, white wire and shield. The red wire is connected to the positive power supply, the white wire is the pulse output and other display instruments or equipment, and the shield is grounded.
C. 4～20mA output type
Working voltage: external power supply +24VDC (two-wire system)
Output signal: 4~20mA or 1-5V. 4mA corresponds to the zero flow of the turbine flow sensor, and 20mA corresponds to the maximum flow of the turbine flow sensor. See the nameplate of the turbine flow sensor for the flow range.
Signal transmission distance: less than 250 meters.
Installation: After the turbine flow sensor is installed, screw the amplifier to the turbine flow sensor connector (m16×1.5 thread). Tighten the lock nut by hand until you feel the amplifier is at the bottom.
Wiring: The external leads of the 4-20mA output amplifier are red and white wires. The red wire is the power wire and the white wire is the signal wire.
D. Split remote display type
Working voltage: 220VAC from external power supply
Signal transmission distance: less than 250 meters
Instantaneous four digits of the indicator: nine digits for the cumulative total
What liquids can be measured by Liquid Turbine Flow Meters?
In terms of measuring liquid flow, turbine flowmeters should be used in the following areas:
Partially corrosive liquid measurement. Such as sulfuric acid, hydrochloric acid, nitric acid, acetic acid and other acids and various chemical solutions.
Water flow measurement in large-diameter pipes, of which the full-pipe turbine flowmeter is mainly used for small and medium pipe diameters. The plug-in turbine flowmeter can be used for large pipe diameter (DN≥300mm) pipeline flow measurement. It is widely used in urban water pipelines and industrial water main lines of enterprises such as chemical industry, electric power, metallurgy, papermaking, and chemical fiber.
Measurement of non-conductive liquids. If it is said that electromagnetic flowmeters dominate the flow measurement of conductive liquids. In the field of non-conductive liquid flow measurement, electromagnetic flowmeters are powerless. The turbine flowmeter is very useful. Turbine flowmeters with small diameters introduced in recent years are more suitable for applications in this field.
Some turbine flowmeter products use a compression molding process to make the turbine flowmeter sensor into an all-plastic product. Then configure a non-contact ultrasonic detection element to measure the liquid without contact. It can be used for flow measurement of corrosive liquids and high purity liquids.
According to relevant information, in the petrochemical, pharmaceutical, food and semiconductor industries, turbine flowmeters have obtained fruitful applications. For example: methanol, formaldehyde, acetone, toluene, trichloroethylene, ethylene, butane liquid ammonia, etc. There are also pure water for the semiconductor industry, ultra-clean pure water and so on.
In fact, if your measuring medium is conductive liquid, or corrosive conductive liquid, or wastewater. It’s better consider using an electromagnetic flowmeter. Let’s take a quick look.
Gas turbine flowmeter is used to detect instantaneous flow and total integrated flow. Its output signal is frequency, which is easy to digitize.
The induction coil and the permanent magnet are fixed on the housing together. When the ferromagnetic turbine blade passes the magnet, the reluctance of the magnetic circuit changes, thereby generating an induction signal.
The signal is amplified and reshaped by the amplifier and sent to the counter or frequency meter. The total accumulated flow is displayed. At the same time, the pulse frequency undergoes frequency-voltage conversion to indicate instantaneous flow.
The speed of the impeller is proportional to the flow, and the number of revolutions of the impeller is proportional to the total amount of flow. The output of the turbine flowmeter is a frequency modulated signal. It not only improves the anti-interference of the detection circuit, but also simplifies the flow detection system.
The gas turbine flowmeter has a turndown ratio of up to 10:1, and the accuracy is within ±0.2%. The time constant of the turbine flowmeter with small inertia and small size can reach 0.01 second.
Liquid Turbine Flow Meter is a speed type flow meter based on the principle of torque balance.
The fluid flows through the sensor housing. Because the blades of the impeller have a certain angle with the flow direction. The impulse of the fluid makes the blades have a rotational torque. After the friction torque and fluid resistance are overcome, the blades rotate. The speed is stable after the torque is balanced.
Under certain conditions, the speed is proportional to the flow rate.
Due to the magnetic permeability of the blade, it is in the magnetic field of the signal detector (composed of permanent magnets and coils). The rotating blade cuts the magnetic lines of force. The magnetic flux of the coil is periodically changed. Electrical pulse signals are induced at both ends of the coil.
This signal is amplified and reshaped by an amplifier. A continuous rectangular pulse wave with a certain amplitude is formed. It can be transmitted to the display instrument remotely. The instantaneous flow or total amount of the fluid is displayed.
Within a certain flow range, the pulse frequency f is proportional to the instantaneous flow Q of the fluid flowing through the sensor. The flow equation is:
Where: f——Pulse frequency [Hz] k——The meter coefficient of the sensor [1/m3], which is given by the calibration sheet. Q——The instantaneous flow of fluid (under working condition) [m3/h] 3600-conversion factor in seconds
The meter coefficient of each sensor is filled in the verification certificate by the manufacturer. The k value is set in the matching display instrument. The instantaneous flow and cumulative total can be displayed.
Generally, the K factor will not change when the flow rate changes, but it should not exceed the upper limit of the flowmeter too much. The K factor is a constant based on a flow rate under certain process parameters.
How to get k factor on turbine flow meter?
There are two kinds of different manufacturers k: One is k=f/Q, that is, the number of vortices generated per unit flow; The other k=Q/f, that is, the plate flow rate corresponding to each vortex. The k value is calibrated with the right factory water. The sensor measures the vortex number of the instrument and compares it with the volume flow measured by the calibration device to obtain the k value.
D-measuring tube diameter St-Strouhal number, constant within a certain range of Reynolds number d—-The characteristic width of the vortex generator m—The ratio of the arcuate area on both sides of the vortex generator to the cross-sectional area of the pipe
In fact, this formula has no practical meaning for you. The values of d and m are difficult to measure accurately. Therefore, it is difficult to obtain an accurate k value by calculation.
How to Calibrate a Turbine Flow Meter?
Before the turbine flowmeter leaves the factory, the coefficients have been set in the table. When the user requests to display in mass units, the coefficient has been corrected and put into the table according to the medium density provided by the user before leaving the factory. It can be used directly on site. If the physical properties of the measured medium on site differ greatly from those of water, on-site calibration can be performed. Specific steps are as follows:
1. Install the turbine flowmeter as required. Turn on the valve to fill the pipeline with medium to ensure that the meter works normally. Close the valve and prepare for calibration;
2. Prepare a standard container or weighing equipment, and use the weighing method as an example here (record the tare weight);
3. First record the cumulative flow of the turbine flowmeter. Turn on the valve to make the flowmeter work within the flow range. When the container is almost full, close the valve. Record the cumulative flow of the flowmeter. Read the net weight of the measured medium on the scale;
4. Put the newly measured meter coefficient into the table again;
High Pressure Turbine Flow Meter
The high-pressure liquid turbine flowmeter is a special high-pressure flowmeter designed for hydraulic equipment, engineering machinery, chemical and other high-pressure fluid industries. The housing is made of stainless steel. The table structure is simple, and the structure design is optimized. It adopts high pressure butt welding flange clamp or high pressure screw connection structure.
Wide range of applications: High-pressure liquid measurement occasions such as chemical high-pressure pipelines, hydraulic equipment, engineering machinery, and test benches. Hydraulic oil, circulating oil, oil station, construction machinery and other high-pressure liquids.
Sino-Inst recommends that you refer to the following factors to select the flowmeter. 1.Fluid type For clear and mixed liquids, clean gases, and mixed gases, different flow meters are required. For example, liquids are generally suitable for turbine flowmeters, and for gas, vortex flowmeters are more popular. Of course, this is only the choice of most people, not a certain one, and can be chosen according to specific needs. 2.Flow range The fluid flow rate range should be moderate, not exceeding the range of the flowmeter. 3.Pipe size For smaller pipe sizes, rotors, turbines, and mass flow meters are generally used. For large pipe diameters, electromagnetic flowmeters and ultrasonic flowmeters are generally used. Some pipes are not suitable for electromagnetic and ultrasonic applications. 4.Signal output If the signal output is not required, rotameter and mechanical water meter are generally used. The output signal has an analog quantity (4-20mA, 0-10V) and pulse output, these flowmeters can have a digital display. 5.Pressure range Depending on the material of the flowmeter’s wetted parts, the pressure resistance is different, and the pressure resistance range of stainless steel and copper is larger. If the flow rate is relatively low, pressure loss needs to be considered. In this case, turbines and positive displacement flow meters are not suitable.
Water flow meter refers to a flow meter that can measure water flow. The common water flow meter is an electromagnetic flow meter. Of course, it can also be a turbine flowmeter, an ultrasonic flowmeter, etc., as required.
What is target flow meter?
Target flow meter, also called drag force flowmeter. Target flow meter inserts a target (drag element) into the flow field. The traget usually is a flat disc or a sphere with an extension rod. There will be a differential pressure. And then target flow meters measure the drag force on the inserted target and convert it to the flow rate. Sino-Inst manufactures target flow meters for liquid, gas and steam measurement.
Request a Quote
Please enable JavaScript in your browser to submit the form
Wu Peng, born in 1980, is a highly respected and accomplished male engineer with extensive experience in the field of automation. With over 20 years of industry experience, Wu has made significant contributions to both academia and engineering projects.
Throughout his career, Wu Peng has participated in numerous national and international engineering projects. Some of his most notable projects include the development of an intelligent control system for oil refineries, the design of a cutting-edge distributed control system for petrochemical plants, and the optimization of control algorithms for natural gas pipelines.
