Inline Ultrasonic Flow Meter is a standard pipe section flow meter. The flow rate is measured by the principle of ultrasonic time difference.

InLine Ultrasonic Flow Meter

The InLine Ultrasonic Flow Meter ( Model:2000F) uses pipe-segment sensors to measure liquid pipes. It solves the problem of measurement accuracy drop caused by non-standard pipes and human installation errors in the process of clamp-on and Insertion type. The measurement accuracy of one percent is truly achieved.

Inline Ultrasonic Flow Meter Reference price: USD 470.00/pc

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

Features of InLine Ultrasonic Flow Meter

  • High accuracy
    • Better than ±1%
  • Wide measuring range
    • Several types transducer for selection, pipe size from Dn15mm to Dn6000mm
  • High Reliability
    • Adopt low voltage, multi-pulse technology to improve accuracy, useful life and reliability.
  • Strong Anti-interference
    • Dual-balance signal differential receiver/driver circuit to avoid interference of converter, TV tower, high voltage line etc.
  • Powerful Recording Function
    • Automatically record the following data:
    • The totalizer data of the last 512 days/128 months/10 years
    • The time and corresponding flow rate of the last 64 times of power on and off events
    • The working status of the last 32 days
  • Far Transmission Distance, Easy for Networking
    • RS485 support wireless network, connect GPRS module to accomplish wireless transmission .
  • Support Heat Measurement
    • Connect the temperature transducer ,can finish the heat/energy measurement.

Specifications of Inline Ultrasonic Flow Meter

Working Conditions:

  Transmitter Transducer
Protection grade IP68 IP68
Temperature -20~60℃ -30~160℃

Optional Transducer:

π type Pipe Transducer
Standard Pipe Transducer

π type Pipe Transducer:

Threaded Connection

Norminal Diameter(DN) Pressure Level(P) Length(L) Connecting Thread Thread Effective length Standard
DN15 2.5 320 G3/4B 18 GB/T7307-2001
DN20 2.5 360 G1B 15
DN25 2.5 390 G11/4B 16
DN32 2.5 450 G11/2B 22.5

Flanged Connection

Norminal Diameter
Pressure Level

Flange Dimension Standard
Diameter of
center hole
in bolts
Diameter of
bolt hole
 Diameter of
c f
2.5 320 95 65 14×4 46 14 2 M12×50
2.5 360 105 75 14×4 56 16 2 M12×50
2.5 390 115 85 14×4 65 16 2 M12×60
2.5 450 140 100 18×4 76 18 2 M16×60

Standard Pipe Transducer:

Norminal Diameter
Pressure Level
Flange Dimension
Diameter of
center hole
in bolts
Diameter of
bolt hole
 Diameter of
c f
40 1.6 300 150 110 18×4 84 18 2 M16×60 GB/T9119-2010
50 1.6 300 165 125 18×4 99 20 2 M16×70
65 1.6 300 185 145 18×4 118 22 2 M16×70
80 1.6 225 200 160 18×8 132 20 2 M16×70
100 1.6 250 220 180 18×8 156 22 2 M16×80
125 1.6 275 250 210 18×8 184 22 2 M16×80
150 1.6 300 285 240 22×8 211 24 2 M20×80
200 1.6 350 340 295 22×12 266 26 2 M20×90
250 1.6 450 405 355 26×12 319 28 2 M22×90
300 1.6 500 460 410 26×12 370 32 2 M22×90
350 1.0 550 500 460 23×16 428 28 4 M20×80
400 1.0 600 565 515 25×16 482 30 4 M22×90
450 1.0 700 615 565 25×20 532 30 4 M22×90
500 1.0 800 670 620 25×20 585 32 4 M22×90
600 1.0 1000 780 725 30×20 685 36 5 M27×110
700 0.6 1100 860 810 25×24 775 32 5 M22×90
800 0.6 1200 975 920 30×24 880 32 5 M27×100
900 0.6 1300 1075 1020 30×24 980 34 5 M27×100
1000 0.6 1400 1175 1120 30×28 1080 36 5 M27×110


Flow range0~±10m/s
Pipe SizeDN15~DN6000mm
Fluid temperature  -30~160℃
Fluid typesWater, seawater, sewage, acid, alkali, alcohol, beer, various oils, etc. can conduct ultrasonic waves as a single uniform liquid
Piping materialSteel, stainless steel, cast iron, copper, PVC, aluminum, fiberglass and all other high quality pipes with lining are allowed
Outputs1 channel 4-20ma current output impedance 0-1k, accuracy 0.1% 1 channel OCT pulse output pulse width 6-1000ms 1 channel relay output
Signal input3-channel 4-20ma current input, the data collector can be connected to three-wire PT100 platinum resistance to realize heat measurement
CommunicationRS485, Modbus Protocol
Power supplyDC8~36V or AC10~30V
AC85~264V,Equipped with waterproof power adapter

Extended reading: Magnetic Large Dia. Pipe Flow Meter

InLine Ultrasonic Flow Meter optional hosts:

Of course, in addition to integrated installation. In-Line Ultrasonic Flow Meter can do split installation. According to the measurement conditions, different hosts can be selected.

Wall-mount-cast aluminum

Wall mounted 2000S1
Power supply:DC8~36V or AC85-264V


Wall mounted 2000S2
Power supply:DC8~36V or AC85-264V


Panel mounted 2000U
Power supply:DC 8~36V or AC85-264V

Module Host

Module mounted 2000M
Power supply:DC 8~36V 


Wall mounted 2000S4
Power supply:DC8~36V or AC85-264V

Inline Ultrasonic Flow Meter Working Principle

Inline Ultrasonic Flow Meter is a meter that measures the flow of liquid in a round tube based on the principle of ” transit Time”. It adopts advanced multi-pulse technology, signal digital processing technology, and error correction technology. The flow meter can be more adapted to the environment of the industrial site, and the measurement is more convenient, economical, and accurate. The products have reached the advanced level at home and abroad and can be widely used in petroleum, chemical, metallurgy, electric power, water supply, and drainage fields.

Ultrasonic flowmeters are the same as electromagnetic flowmeters. Because the flow channel of the instrument is not equipped with any obstructions, it is an unobstructed flowmeter. It is a type of flowmeter suitable for solving difficult problems in flow measurement. Especially in large-diameter flow measurement. The advantages. It is one of the rapidly developing types of flow meters.

Transit Time Ultrasonic Flow Meter adopts the measurement principle of the 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.

Clamp on Ultrasonic Flow Meter Working Principle

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

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

Pipe section In-line sensors

Pipe section In-line sensors

Pipe section sensor: The pipe section sensor is a measurement method in which the pipe section sensor is directly connected to the pipeline under test by using a flange or thread. This sensor solves the problem of man-made or measured pipelines during the installation of the external clamps and plug-in sensors. Errors caused by inaccurate parameters. It has the characteristics of high measurement accuracy, good stability, and maintenance-free.

Clamp-on ultrasonic flow meter

Clamp on Ultrasonic Flow Meter ( Model: 3000S) is composed of a host and an external clamp sensor. The flow measurement of various liquids can be completed by simply sticking the external clamp sensor on the surface of the pipeline. Compared with the traditional flowmeter, it does not need to cut off the pipe and flow, the installation is convenient and quick, and it truly realizes the lossless installation. Compared with the common TDC algorithm of other manufacturers, TGA measurement technology is an algorithm for measuring process time with higher speed and higher accuracy.

Extended reading: Ultrasonic flow detectors types

Insertion Ultrasonic Flow Meter

Insertion Flow Meter ( Model:2000S) solves the problem of signal attenuation when ultrasonic Clamp on flow meter works for a long time and the problem of fouling on the inner surface of the pipe without receiving the signal. It can be installed without stopping production. It can be applied to various pipes such as steel pipe, cast iron, FRP, PVC and cement pipe.

Read more about: Ultrasonic flow meters types & technical guide


An inline flow meter is a flow meter with the function of displaying flow rate on-site. The sensor of the flow meter is installed on the fluid pipe. Digital display or pointer shows the flow rate on the spot.

In-line flowmeters could be digital and mechanical flow meters. Common in-line flowmeters include turbine flowmeters, electromagnetic flowmeters, and ultrasonic flowmeters. With stainless steel material, analog, and 4-20mA output, in-line flow meters can measure and control inline flow.

Read more: Choose the most suitable Inline flow meter

Instruments that measure fluid flow are collectively referred to as flow meters or flow meters. Flowmeter is one of the important instruments in industrial measurement. At present, there are more than 100 types of flow meters in use.

Each product has its specific applicability and its limitations. According to the principle of measurement, there are mechanical principles, thermal principles, acoustic principles, electrical principles, optical principles, and atomic physics principles.

Classified according to the structure principle of the flowmeter. There are positive displacement flowmeters, differential pressure flowmeters, float flowmeters, turbine flowmeters, electromagnetic flowmeters, vortex flowmeters, mass flowmeters, and plug-in flowmeters among fluid oscillating flowmeters.

According to the measurement object, there are two categories: closed pipeline and open channel; according to the measurement purpose, it can be divided into total measurement and flow measurement. The meters are called total meters and flow meters.

The common accuracy of ultrasonic flow meters supplied by Sino-Inst is 1%. It has been able to meet the measurement needs of most customers.

Classification of ultrasonic flowmeters

  1. According to the measurement principle

(1) Time difference method ultrasonic flowmeter;
(2) Frequency difference method ultrasonic flowmeter;
(3) Phase difference method ultrasonic flowmeter;
(4) Doppler ultrasonic flowmeter;
(5) Ultrasonic flowmeters for partially full pipes and river channels that combine liquid level measurement and average flow velocity measurement.

  1. According to the way of use

(1) Portable ultrasonic flowmeter;
(2) Fixed (standard pipe section) ultrasonic flowmeter.

  1. According to the installation method of the transducer

(1) Standard pipe section ultrasonic flowmeter;
(2) Clip-on ultrasonic flowmeter;
(3) On-site hole-opening plug-in ultrasonic flowmeter.

  1. According to whether the transducer is in contact with the fluid

(1) Immersion (contact) ultrasonic flowmeter;
(2) Non-invasive (non-contact) ultrasonic flowmeter.

  1. According to the nature of the measured fluid

(1) Liquid ultrasonic flowmeter;
(2) Gas ultrasonic flowmeter.

  1. According to the number of transducer channels

(1) Mono ultrasonic flowmeter;
(2) Two-channel ultrasonic flowmeter;
(3) Multi-channel ultrasonic flowmeter.

Flow indicator alias The flow indicator is a necessary accessory for observing the flow of the medium in the pipeline. The ability to observe the flow reaction of liquid, gas, steam and other media at any time is an indispensable accessory to ensure normal production. Flow indicators include threaded flow indicators, welded flow indicators, and flanged flow indicators.

Sino-Inst, Manufacturer for InLine Ultrasonic Flow Meters. It can measure a single sound-conducting liquid medium of DN32—6000mm. It can measure even liquids such as water, seawater, oil, and slurry.

Sino-Inst’s InLine 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.

You may like: