Differential Pressure Flow Meters

Differential Pressure Flow Meter is also called DP flow meter. Differential pressure flow meters use the principle of differential pressure to measure the flow of liquid, gas and steam.

Differential Pressure Flow Meter

The differential pressure flow meter is measured by the working principle that there is a certain relationship between the pressure difference and the flow rate when the medium fluid flows through the throttling device. Differential pressure (DP) flow meters are the most widely used form of flow measurement products today. Including: integrated orifice flowmeter, average velocity tube flowmeter, venturi tube, wedge flowmeter, underwater flowmeter, orifice plate, orifice carrier assembly, nozzle flowmeter.

Sino-Inst offers a variety of  DP flow meters for flow measurement. If you have any questions, please contact our sales engineers.

Featured Differential Pressure Flow Meters

Differential Pressure Flow Meters Applications

DP flow meter applicable fluidClean gas
/liquid
Dirty gas
/liquid
Corrosive
liquid
Viscous
liquid
Abrasive
slurry
Fiber-containing
slurry
Low flow
rate fluid
Steam
(gas)
High
temperature fluid
Cryogenic
fluid
Not full
of pipe
Non-newtonian
fluid
Open
channel
V cone
Orifice
Venturi tube
nozzle
Uniform tube
Elbow
○: Design first choice ◎: Available under certain conditions √ :Usually available ╳: Not applicable

Extended Reading: Differential Pressure (DP) Flow Meters Technology

Differential pressure flow meter advantages and disadvantages

Advantages of differential pressure flowmeter

  1. Wide range of applications. There is no other type of flowmeter comparable to a differential pressure flowmeter.
  2. The orifice plate is the most widely used differential pressure flow meter. It has a firm structure, stable and reliable performance and long service life.
  3. The detection parts, differential pressure transmitter, and flow totalizer can be produced by different manufacturers. It is convenient for scale economic production

Disadvantages of differential pressure flowmeter

  1. The measurement accuracy of differential pressure flow meters is generally low.
  2. The range is narrow, generally only 3:1-4:1
  3. Different pressure flow meters require high on-site installation conditions.
  4. The pressure loss of orifice plate and nozzle is large.

Differential pressure flow meter working principle

When the fluid flows through the throttle, the fluid will be accelerated due to the fluid being compressed.

As the velocity of the fluid increases, the kinetic energy of the fluid will increase accordingly.

According to the law of conservation of energy, we know that the static pressure of the fluid being accelerated will reduce the corresponding value.

As the picture shows:

The cross-sectional area of the pipe at cross-section 1 is A1. The average flow velocity of the fluid when flowing through the cross section A1 is V1. Its density is ρ1.

When the fluid flows through cross section 2. The average flow rate of the fluid becomes V2. The density is ρ2. The cross-sectional area is A2.

According to the principle of fluid flow continuity, there is the following relationship: V1×A1×ρ1=V2×A2×ρ2.

If the fluid is a liquid, the density of the fluid before and after compression is generally considered constant. That is, ρ1=ρ2=ρ.

Therefore, the volumetric flow rate of the liquid: qv=V1×A1=V2×A2 ——–Formula①

According to the Bernoulli equation (i.e. the law of conservation of energy), Z1=Z2 on a horizontal pipe, then the following relationship is given:
—————Formula②

Applying the Bernoulli equation and the principle of flow continuity, there are the following relations on the two cross sections:

——————Formula ③

From formula ①, we get: V1=A2/A1×V2; put formula ① and formula ② into formula ③ to get:

———————Formula④

In the above formula: A1=(πD2)/4, A2=(πd2)/4, according to the definition of the diameter ratio according to the diameter ratio β: β=d/D. From formula ①, we can get: V2=qv/A2

Therefore: The theoretical flow formula can be derived from this:

————————–Formula ⑤

Also defined by the outflow coefficient C is: C=actual flow/theoretical flow,
Finally, the calculation formula of differential pressure flowmeter can be obtained:

————————-Formula ⑥;

The expansibility coefficient of ε measured medium in formula ⑥, generally speaking ε=1 for liquid.

It can compress fluid ε<1 for gas, steam, etc.
qv is the volume flow of the fluid, unit: m3/s).
ρ1 is the density of the fluid upstream of the throttle (front) under working conditions, in kg/m3.
d is the equivalent opening diameter of the throttle under working conditions, unit: m.
△P is differential pressure, △P=P1-P2, unit: Pa.

Extended reading: Gas Rotameter Tips

Differential pressure flowmeter selection

The selection of differential pressure flowmeter should consider the following aspects:

1.Accuracy, repeatability, linearity, flow range and range

The standard parts of the differential pressure flowmeter have a strict range of use. These parameters include pipe diameter ratio, Reynolds coefficient, pipe wall thickness and other parameters.

Therefore, these series of parameters should be selected reasonably in actual selection and application. In addition, the accuracy of the differential pressure flowmeter depends to a large extent on the conditions of use on site, and generally depends on the conditions of the fluid.

2.Fluid characteristics

The characteristics of the fluid refer to the fluid’s medium conditions such as density, dynamic viscosity, pressure, temperature, corrosivity, abrasion, fouling, and dirt.
Therefore, the selection is a differential pressure flowmeter that should be reasonably selected according to the physical characteristics of the fluid medium on site. If you do not understand the physical characteristics of the fluid on site, you should actively use the instrument to measure these physical parameters.

3.Economic factors

Should consider the purchase cost of differential pressure flowmeter. Installation costs and after installation. Later maintenance costs. Calibration fee. The later operating cost of the larger diameter differential pressure flowmeter is a relatively large expense. Therefore, the proper caliber differential pressure flowmeter should be selected when selecting the model.

4.Pressure loss

Large pressure loss is one of the main disadvantages of differential pressure flow meters. Orifice plates and nozzles in various throttling devices are throttling parts with large pressure loss. At the same flow rate and β value, the pressure loss of the nozzle is only 30%-50% of the pressure loss of the orifice, which means that the nozzle has a lower pressure loss.

Various flow tubes (Venturi tube, Dole tube, Rollos tube, general Venturi tube, etc.) are throttling devices with low pressure loss. Their pressure loss is only 20% of the orifice plate, even as low as 5%-10%. The development and application of these throttling devices is a direction for future efforts.

Differential pressure flow meters are one of the most widely used types of flow meters. Sino-Inst analyzed the working principle and selection of differential pressure flow meters. It provides a certain theoretical reference basis for the selection and use of differential pressure flow meters in the future.

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Sino-Inst, Manufacuturer for differential pressure flow meters. Including Orifice plate, Venturi, Annubar, etc. Suitable for liquid, gas and steam flow measurement.

Sino-Inst’s differential pressure 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.

B-F Flare Gas Ultrasonic Flow Meter

B-F flare gas ultrasonic flowmeter adopts all-metal ultrasonic transducer. It is suitable for measurement in a variety of harsh environments. The turndown ratio is large. It can measure hydrocarbon gas, exhaust gas and other gas containing impurities and humidity.

Sino-Inst offers a variety of  Ultrasonic gas flow meters for flow measurement. If you have any questions, please contact our sales engineers.

Features of B-F Flare Gas Ultrasonic Flow Meter

  • Large turndown ratio and wide flow velocity measurement range;
  • Suitable for multi-component metering. The gas flow meter is not affected by changes in composition.
  • Suitable for gas flow measurement with rapid changes in composition.
  • Measuring velocity and volume flow;
  • It can measure pulsating flow and can measure in both directions;
  • Measuring hydrocarbon gas;
  • Suitable for gas containing impurities, damp and dirty, corrosion resistance.
  • No routine maintenance is required.
  • It can be installed and maintained online.
  1. Wide range ratio, wide applicable flow range. Can detect small leaks.
  2. The gas flow rate in the flare system is complex and changeable, and the gas composition is often a mixture of multiple different gas sources. The measured fluid has the characteristics of complex and changeable composition, obvious pressure and temperature fluctuation, and wide flow range. Using B-F to measure this type of fluid is excellent.
  3. The B-F flowmeter has no moving parts. The probe is made of all metal material. Can withstand the corrosive environment of flare gas. Stable and durable. Low maintenance.

B-F Ultrasonic Gas Flow Meter Technical specifications

Technical specifications

Parameter category

Specifications

structure type

Plug-in, direct type

Applicable caliber

DN50-DN5000

Number of channels

Mono

Flow rate range

0.03-60m/s (higher range needs to be customized)

level of accuracy

  2-5%, flow velocity 0.3-60m/s

Resolution

0.001m/s

Turndown ratio

2000:1

Work pressure

0-1.6MPa (Higher pressure is optional. The default gauge pressure sensor, if you need an absolute pressure sensor, you need to customize)

Measuring direction

One-way measurement (two-way need to be customized)

Measuring medium

Hydrocarbon, natural gas, coal gas and other media containing water and impurities

Measurement requirements

Medium temperature

-20℃~60℃ (Limit temperature -40℃~85℃)

Ambient temperature

-25℃~ +55℃

Signal, communication and other functions

output signal

4-20mA, frequency (pulse)

Communication Interface

RS-485

Operating Voltage

24VDC

Power consumption

≤3W

data storage

18 months

Front and rear straight pipe

10D before, 5D after

Use operation

Support waveform real-time display and debugging. Set operating parameters through the instrument menu

Alarm function

When the pressure, temperature, ultrasonic signal, instrument hardware, etc. are abnormal, an alarm is generated, and the alarm information can be obtained through the upper computer software to facilitate maintenance.

Explosion protection

Explosion-proof grade

 Ex d mb IIC T5 Gb,  

Protection level

IP65

B-F Ultrasonic Gas Flow Meter Installation

More Features Gas Flow Meters

Sino-Inst’s Flare Gas Ultrasonic Flow Meter 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 Flare Gas Ultrasonic Flow Meter, made in China, Having good Quality, With better price. Our flow measurement instruments are widely used in China, India, Pakistan, US, and other countries.

B-D Pipe Segment Ultrasonic Gas Flow Meter

B-D Ultrasonic Gas Flow Meter is a pipe section flowmeter. Use mono mode. The sound channel design of the ultrasonic transducer takes into account the requirements of various working conditions. Match the rectifier of corresponding caliber. It can be used for high-precision measurement of pipe sections smaller than DN200.

Sino-Inst offers a variety of  Ultrasonic gas flow meters for flow measurement. If you have any questions, please contact our sales engineers.

Features of B-D Ultrasonic Gas Flow Meter

  • Overall explosion-proof design;
  • No moving parts, no pressure loss, reducing use and maintenance costs;
  • The starting flow rate is small. Suitable for measuring low-speed flow;
  • Large turndown ratio, turndown ratio 1:125, measuring flow rate from 0.2-25m/s;
  • The metering is not affected by the composition. Suitable for measuring multi-component gases or gases with changes in composition;
  • The influence of dust and moisture is small. Dirty gases such as coal gas and flue gas can be measured;
  • Proprietary algorithm, which can adapt to the measurement occasions with rapid changes in components, rapid changes in temperature, pressure, and humidity;
  • Can measure pulsating flow and bidirectional flow;
  1. Unique operating software design combines waveform debugging and parameter setting. Convenient on-site operation and maintenance;
  2. Unique maintenance alarm can realize early warning of maintenance time. Provide product stability.
  3. The all-metal ultrasonic transducer has strong anti-interference ability, dirt resistance and long service life.

B-D Ultrasonic Gas Flow Meter Applications

  • It is suitable for the measurement of alkanes such as natural gas, coal bed methane, mine gas, liquefied petroleum gas, methane, ethane, propane, butane, etc.;
  • It is suitable for the measurement of gas such as biogas, biological fermentation gas (water-containing impurities), and biomass fuel gas;
  • Suitable for the measurement of air, oxygen, nitrogen, argon, helium, nitrogen, and other non-corrosive gases;
  • It is suitable for the measurement of flare gas, tail gas, landfill gas, and water treatment aeration;
  • It is suitable for the measurement of helium, ammonia, acetylene, and other gases;

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B-D Ultrasonic Gas Flow Meter Technical specifications

Technical specifications

Parameter category

Specifications

structure type

Direct type

Applicable caliber

DN50-DN200 (other calibers can be customized)

Number of channels

Mono

Flow rate range

0-25m/s

level of accuracy

  1.5%, 1.0%

Resolution

0.001m/s

Flow cutoff point

Qt=0.1 Qmax

Repeatability

Class 1.0: Qt-Qmax 0.2%; Qmin-Qt0.4%

Work pressure

Class 1.5: Qt- Qmax 0.3%; Qmin-Qt 0.6%

Measuring direction

0-1.6MPa (Higher pressure is optional. The default gauge pressure sensor, if you need an absolute pressure sensor, you need to customize)

Measuring medium

Single way measurement (two-way need to be customized)

Measurement requirements

Medium temperature

-20℃~60℃ (Limit temperature -40℃~85℃)

Ambient temperature

-25℃~ +55℃

Signal, communication and other functions

output signal

4-20mA, frequency (pulse)

Communication Interface

RS-485

Operating Voltage

24VDC

Power consumption

≤3W

data storage

18 months

Front and rear straight pipe

10D before, 5D after

Use operation

Support waveform real-time display and debugging. Set operating parameters through the instrument menu

Alarm function

When the pressure, temperature, ultrasonic signal, instrument hardware, etc. are abnormal, an alarm is generated, and the alarm information can be obtained through the upper computer software to facilitate maintenance.

Explosion protection

Explosion-proof grade

 Ex d mb IIC T5 Gb,  

Protection level

IP65

B-D Ultrasonic Gas Flow Meter Flow Range

Nominal diameter

Turndown ratio

Q max

Q min

Metric system(mm)

British system (inch)

(m³/h)

(m³/h)

50

2”

1:80

160

2

80

3”

1:80

400

5

100

4”

1:80

640

8

150

6”

1:80

1300

18

200

8”

1:80

2200

30

Nominal diameter

Turndown ratio

Q max

Q min

Metric system(mm)

British system (inch)

(m³/h)

(m³/h)

50

2”

1:150

212

1.4

80

3”

1:125

450

3.6

100

4”

1:125

640

5.0

150

6”

1:125

1600

13

200

8”

1:100

2260

23

B-D Ultrasonic Gas Flow Meter Straight pipe requirements

a) When there is no rectifier. It is recommended that the length of the front straight pipe is greater than 10D. The length of the rear straight pipe is greater than 5D.

b) With a rectifier. It is recommended that the length of the front straight pipe section is greater than 5D. The length of the rear straight pipe section is greater than 3D.

c) When there are noise sources such as pressure regulating valves on site. A noise reduction pipe section should be installed between the flowmeter and the noise source.

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.

Sino-Inst’s Ultrasonic Gas Flow Meter 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 Ultrasonic Gas Flow Meter, made in China, Having good Quality, With better price. Our flow measurement instruments are widely used in China, India, Pakistan, US, and other countries.

Ultrasonic Gas Flow Meter – B series

The B series Ultrasonic Gas Flow Meter adopts the principle of ultrasonic time difference.

Ultrasonic Gas Flow Meter uses the superposition relationship between the propagation velocity of the ultrasonic signal in the fluid and the fluid velocity for measurement. Ultrasonic Gas Flow Meter-B series is mainly for gases with a single composition such as oxygen, nitrogen, argon, helium, etc. There are also gases such as flare gas and natural gas. The price/performance ratio is very high.

Sino-Inst offers a variety of  Ultrasonic gas flow meters for flow measurement. If you have any questions, please contact our sales engineers.

Features of Ultrasonic Gas Flow Meter – B series

  • Wide measuring range, 1:150
  • 1% higher measurement accuracy
  • Two-way metering
  • No pressure loss
  • No start flow
  • Maintenance-free, less maintenance
  • Intelligent integration

Ultrasonic Gas Flow Meter – B series Model

CodeContentMeaning
1D: Short connection
F: Torch gas plug-in installation
Application scenarios and installation methods
2S:Single ChannelNumber of channels
3DN50 DN80 DN100 DN150…..DN5000caliber
4A: Helium, nitrogen, neon, argon, air and other non-corrosive gases; 
B: Coalbed methane, natural gas, oil and gas, ethanol boil-off gas, methane, ethane, propane, other alkanes and olefin gases. 
C: Gases such as flue gas, flare gas, exhaust gas, tail gas, exhaust gas, etc. 
D: Blast furnace gas, converter gas, coke oven gas, carbon monoxide, mine gas and other gases. 
E: Biogas, fermentation gas, biomass gas, landfill gas and other gases.
Application field

Example: B-FS600C represents B flare gas flow meter. Measuring pipe section DN600. Measuring C gas.

According to the application scenario. B series gas ultrasonic flow meters are divided into B-D type and B-F type.

Rectifier

The Z series rectifier can effectively improve the upstream and downstream measurement conditions of the gas ultrasonic flowmeter. Improve the accuracy of the measurement structure. The Z series rectifier adopts a tube segment honeycomb rectifier. It is connected with the flow meter and the pipe section through a flange. The rectifier plate is made of stainless steel. The meter head is made of stainless steel or cast steel.

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Influence of rectifier on straight pipe section

Installation situationStraight pipe requirements
With rectifierFront straight pipe ≥5D, rear straight pipe ≥3D
Without rectifierFront straight pipe ≥10D, rear straight pipe ≥5D

Sino-Inst’s Ultrasonic Gas Flow Meter 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 Ultrasonic Gas Flow Meter, made in China, Having good Quality, With better price. Our flow measurement instruments are widely used in China, India, Pakistan, US, and other countries.

A-J same side plug-in Ultrasonic Gas Flow Meter

A-J is a plug-in gas ultrasonic flowmeter on the same side. Use single or dual channel mode. The sound channel design of the ultrasonic transducer takes into account the requirements of various working conditions. It is suitable for measurement in a variety of harsh environments. Suitable for low flow rate measurement. Suitable for low-frequency pulsating flow measurement.

Sino-Inst offers a variety of  Ultrasonic gas flow meters for flow measurement. If you have any questions, please contact our sales engineers.

A-J Ultrasonic Gas Flow Meter Applications

  • Gas (coke oven gas, blast furnace gas, converter gas, producer gas, blue coal gas) and other gases measurement;
  • Gas measurement of biogas, bio-fermentation gas, biomass gas, landfill gas, aeration of water treatment plants, etc.;
  • Measurement of exhaust gases such as flare gas, flue gas, exhaust gas, exhaust gas, tail gas, etc.;
  • Measurement of non-corrosive gases such as air, oxygen, nitrogen, argon, helium, etc.;
  • Metering of chemical gases such as ammonia;

A-J Ultrasonic Gas Flow Meter Flow Range

Nominal diameter

Turndown ratio

Starting flow

Q max

Q min

Metric system(mm)

British system (inch)

(m³/h)

(m³/h)

(m³/h)

1300

50”

60:1

950

144000

2400

1400

54”

60:1

1100

166200

2770

1600

62”

60:1

1450

217200

3620

1800

72”

60:1

1850

274800

4580

2000

80”

60:1

2250

339000

5650

2200

88”

60:1

2750

411000

6850

2400

96”

60:1

3250

489000

8150

2600

104”

60:1

3800

573000

9550

2800

112”

60:1

4450

666000

11100

3000

120”

60:1

5050

762000

12700

3200

128”

60:1

5800

870000

14500

3400

136”

60:1

6500

981000

16350

3600

144”

60:1

7300

1098000

18300

3800

152”

60:1

8150

1230000

20500

4000

160”

60:1

9050

1356000

22600

4200

168”

60:1

10000

1500000

25000

4400

176”

60:1

11000

1641000

27350

4600

184”

60:1

12000

1794000

29900

4800

192”

60:1

13000

1950000

32500

5000

200”

60:1

14150

2121000

35350

Read more about: Benefits Of Digital Gas Mass Flow Meters

A-J Ultrasonic Gas Flow Meter Technical specifications

Technical specifications

Parameter category

Specifications

structure type

Direct type

Applicable caliber

>DN1200

Number of channels

Single channel, dual channel

Flow rate range

0.5-30m/s

level of accuracy

1.5% for single channel, 1.0% for dual channel

Resolution

0.001m/s

Work pressure

0-1.0MPa (default gauge pressure sensor, if you need absolute pressure sensor, you need to customize)

Measuring direction

One-way or two-way measurement

Measurement requirements

Medium temperature

-20℃~60℃(Limit temperature -40℃~85℃)

Ambient temperature

-25℃~ +55℃

Signal, communication and other functions

output signal

4-20mA, frequency (pulse)

Communication Interface

RS-485

Operating Voltage

24VDC

Power consumption

Starting current should be ≥ 2A, steady state operating power <15W

data storage

18 months

Front and rear straight pipe

10D before, 5D after

Use operation

Support waveform real-time display and debugging. Set operating parameters through the instrument menu

Alarm function

When the pressure, temperature, ultrasonic signal, instrument hardware, etc. are abnormal, an alarm is generated, and the alarm information can be obtained through the upper computer software to facilitate maintenance.

Explosion protection

Explosion-proof grade

Flowmeter host Ex d IIB T5 Gb, transducer Ex mb IIC T5 Gb

Protection level

IP65

A-J Ultrasonic Gas Flow Meter installation location

Installation locationInstallation description
CVertical installation, it is recommended to install in this position. Long maintenance period and low maintenance
B、DSuitable for general conditions with water and dust, the maintenance period is shorter than that of C
A、EIt is suitable for general conditions with water and dust, and the maintenance period is shorter than that of positions C, B, and D

The vortex flowmeter is a volume flowmeter that measures the volume flow of gas, steam or liquid, the volume flow of standard conditions or the mass flow of gas, steam or liquid based on the Karman vortex principle. When the fluid flows through the dust collector rod of the vortex flowmeter, a vortex is formed. The frequency of vortex shedding is proportional to the fluid velocity. Temperature and pressure compensation can be configured.

Sino-Inst’s Ultrasonic Gas Flow Meter 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 Ultrasonic Gas Flow Meter, made in China, Having good Quality, With better price. Our flow measurement instruments are widely used in China, India, Pakistan, US, and other countries.

A-C Plug-in Ultrasonic Gas Flow Meter on both sides

A-C Plug-in gas ultrasonic flowmeters on both sides, using single or dual channel mode. The sound channel design of the ultrasonic transducer takes into account the requirements of various working conditions. It is suitable for measurement in a variety of harsh environments. Suitable for low flow rate measurement. Suitable for low-frequency pulsating flow measurement.

Sino-Inst offers a variety of  Ultrasonic gas flow meters for flow measurement. If you have any questions, please contact our sales engineers.

A-C Ultrasonic Gas Flow Meter application

  • Gas (coke oven gas, blast furnace gas, converter gas) and other gases measurement;
  • Gas measurement of biogas, bio-fermentation gas, biomass gas, landfill gas, aeration of water treatment plants, etc.;
  • Measurement of exhaust gases such as flare gas, flue gas, exhaust gas, exhaust gas, tail gas, etc.;
  • Measurement of non-corrosive gases such as air, oxygen, nitrogen, argon, helium, etc.;
  • Metering of chemical gases such as ammonia;

A-C Ultrasonic Gas Flow Meter Flow Range

Nominal diameter

Turndown ratio

Starting flow

Q max

Q min

Metric system(mm)

British system (inch)

(m³/h)

(m³/h)

(m³/h)

250

10”

60:1

35

5400

90

300

12”

60:1

51

7500

125

350

14”

60:1

70

10500

175

400

16”

60:1

90

13500

225

500

20”

60:1

140

21000

350

600

24”

60:1

200

30000

500

700

28”

60:1

280

41400

690

800

32”

60:1

360

54000

900

900

36”

60:1

450

69000

1150

1000

40”

60:1

565

84000

1400

1100

44”

60:1

685

102000

1700

1200

48”

60:1

815

123000

2050

A-C Ultrasonic Gas Flow Meter Technical specifications

Technical parameter

Parameter category

Specifications

structure type

Direct type

Applicable caliber

DN250-DN1200 (other calibers can be customized)

Number of channels

Single channel, dual channel

Flow rate range

0.5-30m/s

level of accuracy

1.5% for single channel, 1.0% for dual channel

Resolution

0.001m/s

Work pressure

0-1.0MPa (default gauge pressure sensor, if you need absolute pressure sensor, you need to customize)

Measuring direction

One-way or two-way measurement

Measurement requirements

Medium temperature

-20℃~60℃ (Limit temperature -40℃~85℃)

Ambient temperature

-25℃~ +55℃

Signal, communication and other functions

output signal

4-20mA, frequency (pulse)

Communication Interface

RS-485

Operating Voltage

24VDC

Power consumption

Starting current should be ≥ 2A, steady state operating power <15W

data storage

18 months

Front and rear straight pipe

10D before, 5D after

Use operation

Support waveform real-time display and debugging. Set operating parameters through the instrument menu

Alarm function

When the pressure, temperature, ultrasonic signal, instrument hardware, etc. are abnormal, an alarm is generated, and the alarm information can be obtained through the upper computer software to facilitate maintenance.

Explosion protection

Explosion-proof grade

Flowmeter host Ex d IIB T5 Gb, transducer Ex mb IIC T5 Gb

Protection level

IP65

A-C Ultrasonic Gas Flow Meter installation location

Installation locationInstallation description
AHorizontal installation, it is recommended to install according to this position, the maintenance period is long, and the maintenance amount is small
B、CSuitable for general conditions with water and dust, the maintenance period is shorter than that of A position

The gas turbine flowmeter integrates temperature, pressure, flow sensors and intelligent flow totalizers. The gas turbine flowmeter has high accuracy and good repeatability, so it is suitable for trade measurement and industrial process detection. It is widely used in many kinds of gas in petroleum, chemical, metallurgy, aviation, scientific research and other sectors and industrial fields. Such as natural gas, city gas, propane, butane, air, nitrogen and other gases measurement.

Sino-Inst’s Ultrasonic Gas Flow Meter 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 Ultrasonic Gas Flow Meter, made in China, Having good Quality, With better price. Our flow measurement instruments are widely used in China, India, Pakistan, US, and other countries.

A-S single rod plug-in Ultrasonic Gas Flow Meter

A-S is a single-pole plug-in Ultrasonic Gas Flow Meter. Use single or dual channel mode. The sound channel design of the ultrasonic transducer takes into account the requirements of various working conditions. It is suitable for measurement in a variety of harsh environments. Suitable for low flow rate measurement. Suitable for low-frequency pulsating flow measurement.

Sino-Inst offers a variety of  Ultrasonic gas flow meters for flow measurement. If you have any questions, please contact our sales engineers.

A-S Ultrasonic Gas Flow Meter application

  • Gas (coke oven gas, blast furnace gas, converter gas) and other gases measurement;
  • Gas measurement of biogas, bio-fermentation gas, biomass gas, landfill gas, aeration of water treatment plants, etc.;
  • Measurement of exhaust gases such as flare gas, flue gas, exhaust gas, exhaust gas, tail gas, etc.;
  • Measurement of non-corrosive gases such as air, oxygen, nitrogen, argon, helium, etc.;
  • Measurement of coal-bed methane, mine gas and other gases;

A-S Ultrasonic Gas Flow Meter Flow range

Nominal diameter

Turndown ratio

Starting flow

Q max

Q min

Metric system(mm)

British system (inch)

(m³/h)

(m³/h)

(m³/h)

250

10”

60:1

35

5400

90

300

12”

60:1

51

7500

125

350

14”

60:1

70

10500

175

400

16”

60:1

90

13500

225

500

20”

60:1

140

21000

350

600

24”

60:1

200

30000

500

A-S Ultrasonic Gas Flow Meter Technical specifications

Technical parameter

Parameter category

Specifications

structure type

Direct type

Applicable caliber

DN250-DN600 (other calibers can be customized)

Number of channels

Mono

Flow rate range

0.5-30m/s

level of accuracy

1.5%

Resolution

0.001m/s

Work pressure

0-1.0MPa (default gauge pressure sensor, if you need absolute pressure sensor, you need to customize)

Measuring direction

One-way or two-way measurement

Measurement requirements

Medium temperature

-20℃~60℃(Limit temperature -40℃~85℃)

Ambient temperature

-25℃~ +55℃

Signal, communication and other functions

output signal

4-20mA, frequency (pulse)

Communication Interface

RS-485

Operating Voltage

24VDC

Power consumption

Starting current should be ≥ 2A, steady state operating power <15W

data storage

18 months

Front and rear straight pipe

10D before, 5D after

Use operation

Support waveform real-time display and debugging. Set operating parameters through the instrument menu

Alarm function

When the pressure, temperature, ultrasonic signal, instrument hardware, etc. are abnormal, an alarm is generated, and the alarm information can be obtained through the upper computer software to facilitate maintenance.

Explosion protection

Explosion-proof grade

Flowmeter host Ex d IIB T5 Gb, transducer Ex mb IIC T5 Gb

Protection level

IP65

A-S Ultrasonic Gas Flow Meter Installation

Installation locationInstallation description
A、EHorizontal installation, it is recommended to install according to this position, the maintenance period is long, and the maintenance amount is small
B、DSuitable for general conditions with water and dust. The maintenance cycle is shorter than the installation position of A and E
CSuitable for conditions with less water and dust, the maintenance cycle is shorter than the installation positions of A, B, D, E

A-S Ultrasonic Gas Flow Meter site platform construction diagram

The gas turbine flowmeter integrates temperature, pressure, flow sensors, and intelligent flow totalizers. The gas turbine flowmeter has high accuracy and good repeatability, so it is suitable for trade measurement and industrial process detection. It is widely used in many kinds of gas in petroleum, chemical, metallurgy, aviation, scientific research, and other sectors and industrial fields. Such as natural gas, city gas, propane, butane, air, nitrogen, and other gases measurement.

Sino-Inst’s Ultrasonic Gas Flow Meter 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 Ultrasonic Gas Flow Meter, made in China, Having good Quality, With better price. Our flow measurement instruments are widely used in China, India, Pakistan, US, and other countries.

A-D pipe segment Ultrasonic Gas Flow Meter

A-D Ultrasonic Gas Flow Meter is a pipe section type flow meter, using single or dual channel mode. The sound channel design of the ultrasonic transducer takes into account the requirements of various working conditions. It is suitable for measurement in a variety of harsh environments. Suitable for low flow rate measurement. Suitable for low-frequency pulsating flow measurement.

Sino-Inst offers a variety of  Ultrasonic gas flow meters for flow measurement. If you have any questions, please contact our sales engineers.

A-D Ultrasonic Gas Flow Meter application

  • Gas (coke oven gas, blast furnace gas, converter gas, producer gas, blue coal gas) and other gases measurement;
  • Gas measurement of biogas, bio-fermentation gas, biomass gas, landfill gas, aeration of water treatment plants, etc.;
  • Measurement of exhaust gases such as flare gas, flue gas, exhaust gas, exhaust gas, tail gas, etc.;
  • Measurement of non-corrosive gases such as air, oxygen, nitrogen, argon, helium, etc.;
  • Metering of natural gas, liquefied petroleum gas, coal bed methane, oil and gas, mine gas, wellhead gas and other gases;
  • Metering of chemical gases such as hydrogen, acetylene and ammonia;

A-D Ultrasonic Gas Flow Meter Flow range

Nominal diameter

Turndown ratio

Starting flow

Q max

Q min

Metric systemmm

British system (inch)

m³/h

m³/h

m³/h

50

2

30:1

1.4

212

7

80

3

33:1

3.6

400

12

100

4

50:1

5.6

700

14

150

6

60:1

12.7

1900

32

200

8

60:1

22.6

3400

56

A-D Ultrasonic Gas Flow Meter Technical specifications

Technical parameter

Parameter category

Specifications

structure type

Direct type

Applicable caliber

DN50-DN200 (other calibers can be customized)

Number of channels

Single channel, dual channel

Flow rate range

0.5-30m/s

level of accuracy

1.5% for single channel, 1.0% for dual channel

Resolution

0.001m/s

Flow cutoff point

Qt= 0.2 Q max

Repeatability

1.0 Level: Qt-Qmax 0.2%; Qmin-Qt 0.4%
1.5 Level: Qt-Qmax 0.3%; Qmin-Qt 0.6%

Work pressure

0-1.0MPa (The default gauge pressure sensor, if you need an absolute pressure sensor, you need to customize it)

Measuring direction

One-way or two-way measurement

Measurement requirements

Medium temperature

-20℃~60℃

Ambient temperature

-25℃~ +55℃

Signal, communication and other functions

output signal

4-20mA, frequency (pulse)

Communication Interface

RS-485

Operating Voltage

24VDC

Power consumption

Starting current should be ≥ 2A, steady state operating power <15W

data storage

18 months

Front and rear straight pipe

10D before, 5D after

Use operation

Support waveform real-time display and debugging. Set operating parameters through the instrument menu

Alarm function

When the pressure, temperature, ultrasonic signal, instrument hardware, etc. are abnormal, an alarm is generated, and the alarm information can be obtained through the upper computer software to facilitate maintenance.

Explosion protection

Explosion-proof grade

Ex d mb IIB Gb

Protection level

IP65

Extended reading: Ultrasonic Insertion Flow Meter for Lined/Large Pipes

A-D Ultrasonic Gas Flow Meter pipe size

Nominal caliber

Nominal pressure

Flange standard

Measuring tube inner diameter

Body length

Body width

Body height

DN

MPa

(mm)

L(mm)

B(mm)

H(mm)

50

1.0

GB/T 9119

50

520

400

165

80

1.0

GB/T 9119

80

550

430

200

100

1.0

GB/T 9119

100

550

450

220

150

1.0

GB/T 9119

150

600

500

285

200

1.0

GB/T 9119

200

700

550

340

The gas turbine flowmeter integrates temperature, pressure, flow sensors and intelligent flow totalizers. The gas turbine flowmeter has high accuracy and good repeatability, so it is suitable for trade measurement and industrial process detection. It is widely used in many kinds of gas in petroleum, chemical, metallurgy, aviation, scientific research and other sectors and industrial fields. Such as natural gas, city gas, propane, butane, air, nitrogen and other gases measurement.

Sino-Inst’s Ultrasonic Gas Flow Meter 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 Ultrasonic Gas Flow Meter, made in China, Having good Quality, With better price. Our flow measurement instruments are widely used in China, India, Pakistan, US, and other countries.

Ultrasonic Gas Flow Meter – A series

The A series Ultrasonic Gas Flow Meter solves the problem of gas measurement.

A series Ultrasonic Gas Flow Meter is a split flowmeter suitable for gas measurement under complicated working conditions. The gas ultrasonic flowmeter consists of a flowmeter host, a flowmeter body, an ultrasonic transducer, a pressure transmitter, a temperature transmitter, and installation accessories.

Sino-Inst offers a variety of  Ultrasonic gas flow meters for flow measurement. If you have any questions, please contact our sales engineers.

Features of Ultrasonic Gas Flow Meter – A series

  • The measurement is not affected by the components, and the dust and moisture are small. Suitable for measuring multi-component gases or gases with changes in composition;
  • The all-metal design of the transducer is highly reliable and resistant to dirt. It can measure dirty gases such as coal gas and flue gas, and has a long service life;
  • Use professional digital signal processor. The running speed is fast and the algorithm reliability is high. The flow response is real-time, which can meet the gas measurement of complicated working conditions with rapid changes in temperature, pressure and humidity;
  • The starting velocity is small, the starting velocity is 0.2 m/s. Suitable for measuring low-speed flow;
  • Large turndown ratio, turndown ratio 60:1. Measuring flow rate from 0.5~30 m/s;
  • Can measure pulsating flow and bidirectional flow;
  • No moving parts, no pressure loss. Reduce use and maintenance costs;
  • Support online non-stop gas installation and maintenance;
  • Supports real-time waveform display and debugging, and the operation interface is menu-oriented, which is convenient for users to use;
  • Support intelligent alarm, convenient for customer maintenance;
  • Large measuring range, support DN50-DN5000 pipe section measurement

Guess You’ll Like: Ultrasonic flow meters types & technical guide

Model of Ultrasonic Gas Flow Meter – A series

CodeContentMeaning
1D: Pipe segment installation
S: Single pole plug-in installation
C: Plug-in installation on both sides
J: Plug-in installation on the same side
Installation form 
2S:  Single channel
D: Two-channel
Number of channels 
3DN50 DN80 DN100 DN150 DN200…….DN5000Caliber 
4A: Helium, nitrogen, neon, argon, air and non-corrosive gases
B: Coal-bed methane, natural gas, oil and gas, ethanol boil-off gas, methane, ethane, propane, other alkanes and olefin gases
C: Blast furnace gas, converter gas, coke oven gas, carbon monoxide, mine gas and other gases
D: Flue gas, torch gas, exhaust gas, exhaust gas, exhaust gas and other gases
E: Biogas, fermentation gas, biomass gas and other gases
F: Other types of gas
Application field

Example: A-SS-600D represents the A series split single-rod plug-in installation flow meter, measuring pipe section DN600, and the medium used is Class D gas.

Ultrasonic Gas Flow Meter – A series Installation Precautions

  • Do not install the flow meter host for outdoor use. When necessary, it should be installed in the instrument protection box. Avoid sun and rain.
  • The main unit of the flow meter should be installed vertically on the bracket or on the wall. And do not install in places subject to strong vibration.
  • The flowmeter host should avoid sharing an AC power supply with inverters, electric welders and other equipment.
  • The housing of the flowmeter host must be grounded separately (grounding resistance <4Ω).
  • The installation position of the transducer should be as far away as possible from the position that has a great influence on the fluid distribution. Such as: pump, elbow, tee, reducer, etc.
  • The installation position of the transducer should be as far away as possible from the throttle or regulating valve.
  • The installation location of the flow meter host and transducer should avoid the environment that can cause resonance of the signal processing unit, ultrasonic transducer and other components. And avoid environments where strong electromagnetic or electronic interference may exist.
  • When installing, ensure a certain length of straight pipe section upstream and downstream. Usually requires 10D upstream and 5D downstream.
  • Where there is a danger of lightning strikes, lightning arresters should be installed.
  • When the distance between the flow transmitter and the ultrasonic probe is far, the direct connection with the flowmeter signal cable will cause signal attenuation and interference. So try to shorten the distance between the two. Generally required: the cable connection distance between the host and the probe is less than 10 meters.
  • The signal cable connected between the flow transmitter and the ultrasonic probe should be isolated from the power line and avoid using the same casing.

Read more about: Industrial Gas Measurement with Digital Gas Mass Flow Meters

More Features Gas Flow Meters

Sino-Inst’s Ultrasonic Gas Flow Meter 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 Ultrasonic Gas Flow Meter, made in China, Having good Quality, With better price. Our flow measurement instruments are widely used in China, India, Pakistan, US, and other countries.

Ultrasonic Gas Flow Meters

Ultrasonic Gas Flow Meter uses the principle of measuring the transit time of ultrasonic waves in the pipeline. Ultrasonic Gas Flow Meter is an ideal choice for various gas measurements.

The gas ultrasonic flowmeter is suitable for blast furnace gas, converter gas, coke oven gas, mixed gas, gas, compressed air, chlorine, nitrogen and other industrial gases. Suitable for large-caliber gas measurement, suitable for low flow rate, pulsating flow gas measurement. It has the advantages of not being affected by gas components, dirt resistance, fast response, wide range, high precision, good stability, and less maintenance.

Sino-Inst offers a variety of  flow meters for flow measurement. If you have any questions, please contact our sales engineers.

Ultrasonic Gas Flow Meter Introduction

The ultrasonic gas flow meter is designed and manufactured according to the national standard GB/T-18604-2014 and the verification regulation JJG-1030-2007 using the principle of ultrasonic time difference method. Also refer to the US AGA8/AGA9/AGA10 report. Various performance indicators have reached the international advanced level of gas measurement.

Compared with traditional flow meters, gas ultrasonic flow meters have no pressure loss, strong anti-interference ability, wide range ratio, can measure small flow, can measure bidirectional flow and pulsating flow, and have the characteristics of being independent of gas composition. It is a new type of flow meter with excellent performance.

Features and advantages of Ultrasonic Gas Flow Meter

  • Suitable for multi-component metering. Gas flow measurement is not affected by changes in composition.
  • It can measure small flow and solve the problem of low flow gas measurement.
  • Large turndown ratio meets the measurement requirements of high flow rate and low flow rate.
  • Pulsating flow can be measured.
  • It can be measured in both directions.
  • Can measure dirty gas containing impurities and moisture;
  • Corrosion resistant, can measure corrosive gas flow.
  • It can be installed online and maintained online.
  1. It adopts industrial design and the flowmeter has no moving parts. No pressure loss, reducing product use and maintenance costs.
  2. It adopts all-metal transducer, which is resistant to dirt and corrosion. With a unique algorithm, it can ensure the gas flow measurement in the dirty medium.
  3. Supports intelligent alarms such as pressure, temperature, flow, and ultrasonic signals. It can realize the early warning of the ultrasonic transducer before maintenance is required. Reduce maintenance frequency. Reduce maintenance costs.
  4. Visual waveform display, menu-based instrument interface. It is convenient to use and debug the instrument.

Ultrasonic Gas Flow Meter Applications

  • Gas (coke oven gas, blast furnace gas, converter gas, producer gas, blue coal gas) and other gases measurement;
  • Gas measurement of biogas, bio-fermentation gas, biomass gas, landfill gas, aeration of water treatment plants, etc.;
  • Measurement of exhaust gases such as flare gas, flue gas, exhaust gas, exhaust gas, tail gas, etc.;
  • Measurement of non-corrosive gases such as air, oxygen, nitrogen, argon, helium, etc.;
  • Metering of natural gas, liquefied petroleum gas, coal bed methane, oil and gas, mine gas, wellhead gas and other gases;
  • Metering of chemical gases such as hydrogen, acetylene and ammonia;

Read more about: Liquid Ultrasonic flow meters types & technical guide

Ultrasonic Gas Flow Meter Measuring principle

The ultrasonic flowmeter is realized by measuring the propagation time of ultrasonic waves in the pipeline. The gas flow rate is obtained by the flow velocity, the cross-sectional area of the pipe and the Reynolds number.

Ultrasonic flow meters use the sound wave propagation velocity method to measure the flow rate by calculating the time difference. Assuming: the sound velocity when the fluid is at rest is c, and the fluid velocity is v, then the propagation velocity in the forward flow is c+vcosθ, and the propagation velocity in the reverse flow is c-vcosθ.

Set up two ultrasonic generators (also receivers) T1 and T2 in the fluid, the distance between T1 and T2 is L, the time from T1 to T2 is t1, the time from T2 to T1 is t2, and the diameter is D , The angle between the ultrasonic transmission axis and the central axis is θ, and the time difference between the forward and reverse directions is △t=t2-t1.

L: Ultrasonic sensor distance
C: Speed of sound
V: average flow velocity
θ: Ultrasonic transmission shaft and measuring tube
The angle of the central axis
t1: Ultrasonic propagation time (downstream)
t2: Ultrasonic transmission time (backflow)
Q: Flow
A: Cross-sectional area
K: correction factor

According to the above settings:
Suppose the travel time in the forward direction is t1, and the travel time in the reverse direction is t2.

Take the reciprocal of its propagation time as the difference, namely:

Can eliminate the speed of sound term C:

The “reciprocal difference of propagation time” method with superior repeatability: it is not affected by changes in the speed of sound (temperature), the measurement object is only time, and there is almost no change in year-round use.

Flow rate is related to fluid velocity and cross-sectional area:

Flow rate = velocity * cross-sectional area

After correction by the flow correction coefficient, the flow can be calculated as follows:

Sino-Inst’s Ultrasonic Gas Flow Meter 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 Ultrasonic Gas Flow Meter, made in China, Having good Quality, With better price. Our flow measurement instruments are widely used in China, India, Pakistan, US, and other countries.