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Flowmeter

 

HY Field Instrument: Your Professional Level Meter Manufacturer!

HY Field Instrument Co., Ltd. has been focusing on field instruments for more than ten years. Our product lines include flowmeters, level meters, pressure transmitters, analytical instruments, etc. The main products include electromagnetic flowmeter, Coriolis mass flowmeter, vortex flowmeter, ultrasonic flowmeter; radar level meter, ultrasonic flowmeter, capacitive pressure transmitter, online density meter, etc.

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Our Advantages

Advanced Production Equipment

Automatic welding machines, laser welding machines, argon arc welding machines, electric heating constant temperature ovens, spot welding machines, high and low temperature test chambers, calibration systems, etc. from well-known suppliers can ensure high-precision production of instruments.

Reliable Product Quality

Our company has passed ISO9001 certification, and our products have obtained CE, Exploreproof, Atex, and other certifications, with very high reliability.

 

 

Extensive Sales Market

Our products are exported to more than 80 countries and regions including the United States, Germany, France, Italy, Brazil, Chile, Vietnam, Saudi Arabia, and the United Arab Emirates, and have reached annual sales of more than 5 million US dollars.

Comprehensive Service

We provide professional product introduction, technical exchange, product design, troubleshooting, and other services. At the same time, technical and inspection personnel will conduct return visits to customers to continuously improve product experience.

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Introduction to Flowmeter

A flow meter (or a flow sensor) is a type of flow instrument that is used to indicate the amount of liquid, gas, or vapor moving through a pipe or conduit by measuring linear, non-linear, mass, or volumetric flow rates.

Oval Gear Flow Meter For Diesel

 

Common Types of Flowmeters
Positive Displacement Flowmeter
Positive Displacement Flowmeter
Positive Displacement Flowmeter
Slight Gas Flowmeter

DP Meters
Differential Pressure is the oldest industrial measurement technology still in use today, with a proven documented history of performance. Our ongoing research ensures that the 100-year-old design is fine-tuned for today’s flow meters. The differential pressure flow meter is the most widely used flow technology in industrial process measurement and control, natural gas custody transfer measurement and many other applications.
Magnetic Meters
Electromagnetic flow meters (known more simply as magnetic flow meters, or mag meters), represent the second largest segment within the precision flow meter market, and will likely overtake the top position held by traditional Differential Pressure (DP) flow technologies. Magnetic flow meters are a top choice for measuring the volumetric flow of conductive liquids due to their excellent measurement performance across a wide range of process conditions.
Ultrasonic Meters
Ultrasonic meters are commonly used for custody transfer and fiscal oil and gas measurement. An ultrasonic flow meter measures the velocity of a fluid in a closed pipe using ultrasonic sound pulses. However, process conditions such as composition, pressure and temperature dictate which type of ultrasonic meter is most appropriate.
Vortex Meters
Vortex meters can be used to measure gases and low-viscosity liquids over a wide range of conditions, and with the recent development of multivariable flow measurement capability, they can also directly output referred units such as gas standard volume, liquid standard volume, mass flow, and energy/heat index values such as British Thermal Units (BTU). Vortex meters have exhibited steady growth in recent years, primarily due to their adoption in saturated steam and oil & gas applications.

 

 

Benefits of Flowmeter

Gas Turbine Flowmeter

Accuracy

Accuracy is one of the key benefits of flowmeters. They give accurate measurements of fluid flow rates, enabling businesses to monitor their processes and identify any issues that may be impacting operations. This degree of precision may help organizations enhance product quality, eliminate waste, and optimize manufacturing processes.

Milk Turbine Flowmeter

Cost-Effective

Flowmeters are an economical means of monitoring fluid flow rates. They are low-maintenance and long-lasting, requiring minimal upkeep. The precise measurement data they give can aid firms in identifying inefficiencies and minimizing waste, so saving them money over time.

Portable Ultrasonic Flowmeter

Versatility

Flowmeters may be used in a variety of applications to measure the flow rate of liquids and gases. They may be mounted in pipelines, tanks, and other systems, making them an adaptable monitoring device for fluid flow rates.

Clamp On Ultrasonic Flowmeter

Simple Installation

Flowmeters are simple to install and may be adapted to existing systems without major adjustments. Its ease of installation makes them a convenient alternative for firms who wish to improve their fluid management without interrupting operations.

Clamp On Ultrasonic Flowmeter

Real-Time Monitoring

Flowmeters enable real-time monitoring of fluid flow rates, enabling organizations to promptly discover any operational problems. This real-time monitoring may aid organizations in optimizing their operations, reducing waste, and enhancing product quality.

Non Invasive Ultrasonic Flowmeter

Regulatory Conformity

There are laws controlling the measuring of fluid flow rates in several sectors. Flowmeters offer a precise and dependable method for complying with these laws, allowing businesses to avoid any penalties or fines that may arise from noncompliance.

 

Application of Flowmeter
 

 

Oil & Gas

 

Oil and gas manufacturing requires flow meters for many reasons. The main purpose is to measure the volume of the liquids and natural gases at many different points in the process. The oil and gas industries must properly measure flows regardless of whether they are pure or not as well as when flowing long distances. The oil industry uses flow meters to measure the volume of oil flowing from one point to the other. The natural gas industry uses flow meters for the same reasons as the oil industry. They need flow meters to show and record how much gas is flowing and processing. Both oil and gas use flow meters to record and monitor their various systems and processes.

Open Channel Flowmeter
TUF-2000H Flowmeter

Wastewater & Water Utilities

 

From wastewater to drinking water, flow meters are critical for the wastewater and water utilities industry. The water industry currently endures significant challenges caused by rapid urbanization, climate change, and rising customer demands; thus, the industry must accurately measure wastewater, such as sewage and other waste. Flow meters can prevent clogs in systems with thicker wastewater, such as sludge. Water utilities also need flow meters for potable drinking water. They must accurately measure the correct amount of water that reaches each sector, such as in a city grid. This is very important so people have access to clean drinking water.

Food & Beverage

 

The food and beverage industry is usually characterized by a high water consumption and considerable waste water discharge volumes. For this reason, they face significant costs for water supply and trade effluent disposal. Expenses for water supply and waste disposal, increased global competition in the food & beverage industry, rising of raw material costs, and energy supply rates drive the important of having more efficiently and optimized production processes.

Coriolis Flowmeter

 

Working Principle of Flowmeter
 

Magnetic Flow Meter
There are many types of flow meters available for use in industrial automation. Depending on the product to be measured, whether it be liquid or gas, some basic principles apply to how the meters work. Let’s take a Magnetic Flow Meter or mag meter. The measured liquid must be water based or conductive. This makes the mag meter a great choice for waste water or process water that is considered fouled or dirty. Mag meters are volumetric meters that have no moving parts. This is ideal for those areas where you wouldn’t want to be exposed to the measured liquid while working on the meter. The way a mag meter works is based on a formula called Faraday’s formula. Firstly, again, the liquid must be conductive. A voltage is measured that is dependent on the average velocity of liquid times the strength of the magnetic field times the length of the conductor (this is the distance between the electrodes).

 

Mechanical Flow Meter
While mag meters work based on Faraday’s formula, other flow meters work in different ways. For instance, a mechanical flow meter has some moving, internal parts which may not fit with specific applications such as dirty water that carries large particles that may cause damage or obstruct the internal parts. The mechanical flow meter has a rotational device inside such as a paddle wheel or a propeller. Liquid flowing through a pipe causes the rotation of the internal paddle, which creates a flow rate that is proportional to the rotational speed of the internal paddle. The mechanical flow meter is easier for laymen to understand. Peddling a bicycle slowly moves you slowly, while pedaling quickly will move you much faster. Direct correlation between how fast the pedals rotate (therefore wheels) and how fast you go down the road. No formula needed, just pedal faster, move faster. Same principle as the internal paddle, the faster it is rotating, the more flow going through the pipe which in turn, sends a graduated signal to your PLC.

 

Vortex Flow Meter
Yet still, there are other types of flow meters. There’s vortex, which measures vortices, essentially, a sensor tab will bend and flex from side to side as the vortex passes. The bend and flex action will then produce an output frequency that is proportional to volumetric flow.

 

Ultrasonic Flow Meter
The principle behind these meters is that an ultrasonic signal is transmitted downstream or in the direction of the flow while another signal is transmitted upstream. The delta or differential time is used to calculate the velocity of the liquid. That velocity is then used to calculate the volumetric flow through the pipe.

 

Factors to Consider Before Choosing a Flowmeter

Determine the Type of Flow Meter Required

There are different flow meter technologies, each suited to specific types of fluid. Common technologies include the diaphragm, venturi, float, electromagnetic, vortex, ultrasonic, Coriolis, and thermal flowmeters. Choose the one that best suits your application.

Take Into Account Specific Parameters

To choose the right flow meter, take into account parameters such as fluid density, pressure, temperature and any pressure drops. These factors can influence how well the flowmeter works in your application.

 

Consider Installation Requirements

The conditions in which the flow meter is mounted can have an impact on its accuracy and performance. Take into account installation constraints such as pipe bends, valves, and constrictions. Some types of flow meters are more sensitive to these disturbances than others.

Check out Reputable Brands

Choose flow meter brands that are well-known and reliable on the market. A brand's reputation is often an indicator of the quality and performance of its products.

 

 

Tips for Flowmeters

 

Coriolis Flowmeter

Selection

One of the biggest factors that affects flow meter accuracy is the selection and installation of the correct device. In order to select the best possible flow meter for your application, you should make yourself familiar with the particular requirements of your system and the process fluid the flow meter will be measuring. Other factors that should contribute to your flow meter selection decision include the facility’s employees familiarity with the system, the availability of an expert who can provide troubleshooting services for the system if problems arise, cost of installation, and more.

Coriolis Mass Flowmeter for Drinking

Installation & Calibration

The next factor that contributes to flow meter accuracy is the installation and calibration of the flow meter. If your flow meter is not installed and calibrated properly, you have a very slim chance of sustaining accurate readings. Be sure that whoever is installing and calibrating the flow meters at your facility has a high level of familiarity and expertise with both the flow meter itself and the process fluid it will be used for. After the flow meter is installed, a calibration test should be performed under normal operating conditions with all the variables that may affect flow rates.

Coriolis Mass Flowmeter for Drinking

Maintenance

Finally, the best way to maintain the accuracy of your flow meter after you have selected, installed, and calibrated the equipment correctly is to perform regular maintenance on the flow meter. Almost all kinds of equipment require regular maintenance and upkeep to keep them running at peak performance, and flow meters are no different. Flow meters and the piping they are attached to should be inspected regularly, especially if the fluid moving through them is dirty or viscous. If you have noticed inaccuracies with your flow meters, you should have an industry expert troubleshoot them as soon as possible!

 

Our Certificate
 

In order to ensure the quality of our products, our company has passed ISO9001 quality system certification, and our products have obtained CE, Exploreproof, Atex, and other certifications.

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Our Factory

Our modern factory is equipped with multiple production lines. The flow meters, liquid level meters, pressure transmitters, temperature sensors, and transmitters we produce are widely used in the petrochemical industry, natural gas, environmental engineering, pharmaceutical engineering, food engineering, water treatment, Marine engineering, and other fields.

Ultimate FAQ Guide to Flowmeters
 

Q: How does an electric flow meter work?

A: The magnetic flow meter's sensor is placed inline and measures an induced voltage generated by the fluid as it flows through a pipe. The transmitter takes the voltage generated by the sensor, converts the voltage into a flow measurement and transmits that flow measurement to a control system.

Q: What is flow meter method?

A: Flow measurement is the use of a flow meter to measure the volume or mass of fluid passing through a specific point over a given period of time. Fluids measured include liquids, gases, vapors or solid powders. Measuring liquid flow is necessary to control and check the quality of industrial processes.

Q: Do flow meters control flow?

A: Flow meters are devices used in fluid systems to measure linear, nonlinear, volumetric or mass flow rate of a liquid or a gas. They have many different applications and can be fitted with an integrated flow control valve to control output flow.

Q: How does a flow meter measure flow rate?

A: Magnetic flow meters work by applying a magnetic field to the flow passing through the pipe. This induces a small electronic potential difference (thanks to Faraday's law and electromagnetic induction) that can be measured by electrode sensors.

Q: How do I know if my flow meter is accurate?

A: The accuracy is determined through the process of calibration. To accurately perform a calibration, a calibration stand is required. The stand would require a reference flow meter with an accuracy better than the expected accuracy of the meter under test. A typical accuracy of a reference meter is + or – .

Q: Where do you read a flowmeter?

A: Most float type flow meters are read at the top of the float. Simply locate the top of the float and reference it to the scale printed on the outside of the flow meter. Make note of what units of measurement your scale in printed in to avoid misinterpretation of the flow rate.

Q: Is a flow meter a sensor?

A: Flow meters, also known as flow sensors, are used to measure the flow rate of a liquid or gas. There are a variety of different types of flow meters, including ultrasonic, electromagnetic, Karman vortex, paddlewheel, floating element, thermal, and differential pressure types.

Q: Is flow meter analog or digital?

A: Analog
Analog instruments include level sensors, pressure sensors, flow meters, water quality meters and motor speed signals.

Q: What are the problems of flow meters?

A: With a flow meter that has mechanical components in the piping, axial wear and abrasion may occur, and flow may be lowered. Though sludge can be removed using a strainer or magnetic separator, complete removal is difficult and maintenance is still required.

Q: Do flow meters require calibration?

A: Yes. For example, flow meters are calibrated periodically in industrial settings to ensure operations are safe and work in a timely manner. Even the most expensive or reliable flow meter can fall out of calibration, as technical equipment degrades over time.

Q: What are the standard conditions for a flow meter?

A: For standard conditions, the most commonly accepted definition used by engineers is the ISO definition, i.e. 1 atmosphere at sea level (101.3 kPa, 14.696 psia) and 59 °F (15 °C).

Q: What is the output signal of a flowmeter?

A: When fluid is going through the flow sensor, a Hall Effect transistor is turned on and off by magnets in the six-spoke rotor. Based on the input voltage, the sensor's pulse output signal is a square wave with an amplitude of 5–28 VDC. At each meter's max flow rate, the output frequency ranges to 240 Hz.

Q: What material is a flowmeter?

A: Common lining materials for magnetic flowmeters: polytetrafluoroethylene, polytetrafluoroethylene (F-4), tetrafluoroethylene, and Hexafluoropropylene (F-46), tetrafluoroethylene and ethylene (F-40), polyurethane rubber, neoprene, acid-resistant enamel, ceramics, acid-resistant rubber.

Q: Does the flowmeter go before or after the valve?

A: Valves should always be positioned after the flow meter because they will disrupt the flow profile for a considerable distance downstream of the valve.

Q: What is the difference between a flow meter and a flow transmitter?

A: Flow meters are designed to measure flow rates. On the other hand, flow transmitters not only measure flow, but also help control and monitor it. Flow meters are standard mechanical systems such as orifice plates, venturi meters, etc.

Q: Do flow meters regulate pressure?

A: The two main flow control devices are regulator flowmeters and flowgauge regulators. While both are designed to regulate pressure and measure gas flow, they operate quite differently.

Q: What is the minimum distance for a flow meter?

A: A general rule of thumb is to have a minimum distance of 3 times the pipe diameter (3 x DN) upstream and a minimum distance of 2 times the pipe diameter (2 x DN) downstream from any interfering elements.

Q: Why do I need a precision flow meter?

A: Precision flow meters are used to provide accurate monitoring and/or flow control. Some industrial applications require precise calculation of quantity, such as precision servo-valve development for the aerospace industry. On the other hand, an application to measure water flow to a vineyard may only require a measurement accuracy of 5% to 10%.

Q: How often should a flow meter be calibrated?

A: Because flow measurements are so critical to many processes, the industry standard is to calibrate annually, even though that might not be necessary. In many cases, this is done in an attempt to demonstrate to a quality auditor that instruments within the process are under control.

Q: What is preventive maintenance of the flowmeter?

A: Keep the interior of the flow meter housing clean and free of dust, moisture, oils or corrosive materials. Protect the flow meter from dripping or splashing corrosives or solvents which may attack meter exterior and eventually damage the internal mechanism.

Q: How to choose the right flow meter?

A: Accuracy & Repeatability
Near the top of the list when evaluating flow meter specs is flow meter accuracy. Accuracy is how close a measurement is to the actual true value passing through a system. Expressed as a percentage (i.e. +/- 1%) accuracy represents how close the meter’s output is to its calibrated parameters. Generally, the lower the percentage, the more accurate a meter is. However, accuracy is not the only side of the coin. Repeatability, or the production of like outcomes under the same conditions, is perhaps even more important when evaluating which flow meter to choose. This is because accuracy is only reliable so far in as its consistency. As you can see below, repeatability is possible without high accuracy, but high accuracy is not achievable without repeatability. If your flow readouts are unreliable—meaning you receive inconsistent results despite the same conditions—then you aren’t gaining any value. Likewise, if your flow volume falls short of or exceeds your meter’s rated flow range (also known as turndown), you won’t receive accurate readings either.
Liquid, Gas, or Semi-Liquid
The type of fluid you work with is another big factor when choosing which flow meter fits your application. Fluid type breaks into four categories—gas, liquid, slurry, and vapor—each with unique characteristics. Properties such as fluid density, temperature, viscosity, and corrosiveness/acidity all must be determined before a final selection. This ensures you avoid choosing a flow meter incompatible with the fluid type you are attempting to measure. Electromagnetic flow meters, for example, won’t work with non-conductive fluids like hydrocarbons. Likewise, few meter types are capable of measuring slurries because of their unique semi-liquid characteristics. 
Location & System Configuration
Meter location, as in real estate, is another major consideration. Will the flow meter be installed inside a controlled environment or outdoors in the elements? Is space a non-factor, or must size be considered? Certain flow meters even require stretches of straight pipe before and after the meter to generate accurate flow readings. As a rule of thumb, pipe lengths of 10X (where X = pipe diameter) are needed before and after a meter for straight runs of pipe. So, if your plumbing’s diameter is 2” you would need 20” or approximately 2 feet of pipe before and after the flow meter. This goes for just about any meter type, but it is always best to check the manufacturer’s specs. Also, keep in mind horizontal or vertical mounting. Some meters can be mounted in either orientation while others must be one orientation or the other. Variable flow meters, for example, rely primarily on gravity in order to measure flow rate. Thus, they must be installed vertically to work. Determining how and where a meter will be installed while choosing a meter saves installation time and avoids costs related to unintended system reconfiguring.
Differentiating Between Volumetric vs. Mass Flow 
While there are many types of flow meters, most used today fall under two primary categories according to how they calculate flow: volumetric and mass.As their name suggests, volumetric flow meters measure flow by calculating the volume of a fluid. Flow is often directed through an intrusion metering device such as a turbine or orifice plate, which then measures fluid velocity proportionally to the volume of matter passing by. Volumetric flowmeters make up the majority of meter types today and include turbine, magnetic, positive displacement, ultrasonic, and vortex meters to name a few.
Volume Flow vs. Mass Flow Within a Cylinder
Mass flow meters, meanwhile, calculate flow rate by measuring the mass of a fluid. Mass meters have become increasingly popular due to their precision performance and truer reading of product flow compared to older metering technologies. Whether you choose volumetric meters and mass meters depends on your application and metering needs, as well as your operational preferences and cost differences.

As one of the most professional flowmeter manufacturers and suppliers in China, we're featured by quality products and low price. Please rest assured to buy customized flowmeter from our factory. Contact us for pricelist and quotation.

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