High Precision 100mm LNG Flow Meter with ±0.1% Accuracy

Product Description

LNG Coriolis Mass Flow Meter is a high-precision flow measurement instrument designed for liquefied natural gas (LNG), cryogenic liquids, and industrial gas applications. It directly measures mass flow, density, and temperature, eliminating errors caused by pressure and temperature variations

This product is a high-precision Coriolis Mass Flow Meter designed for direct measurement of mass flow, density, and temperature, while also enabling volumetric flow calculation. It is widely used in oil & gas, LNG/CNG, hydrogen energy, chemical processing, food & beverage, pharmaceutical industries, and industrial process control applications.

The meter adopts advanced digital signal processing technology and a highly stable sensor structure, featuring high measurement accuracy, excellent repeatability, and strong anti-interference capability. It is suitable for cryogenic, high-pressure, low-flow, and other demanding operating conditions. Stable and reliable measurement can be achieved for liquids, gases, and certain slurry media.

Product Features

• Direct mass flow measurement independent of pressure & temperature
• High accuracy for LNG custody transfer applications
• Wide turndown ratio for low and high flow conditions
• No moving parts → low maintenance cost
• Stable performance under vibration and cryogenic conditions
• Real-time density measurement for energy calculation
• Multi-protocol communication for automation systems

The meter supports seamless integration into LNG station automation systems:

• SCADA systems
• DCS / PLC systems
• LNG skid control systems

Supported protocols:

• Modbus RTU
• HART
• RS485

Applicaiton Scenario

• LNG Industry Applications:

• LNG custody transfer measurement
• LNG truck loading & unloading system
• LNG refueling station (LNG dispenser)
• LNG satellite station metering
• LNG storage tank measurement
• LNG terminal metering system
• LNG bunkering & marine fueling

• Energy & Gas Applications:

• CNG refueling systems
• Hydrogen energy stations (H2 fueling)
• Industrial gas measurement
• Cryogenic liquid measurement

• 

Product Parameters

Model	DN	Flange (HGT20592-2009)   Flange (GBT9124.1-2019)						Flange (HGT20592-2009)   Flange (GBT9124.1-2019)
		Nominal Pressure	A	K	D	N	Ф	Nominal Pressure	A	K	D	N	Ф	C	E	F
AMF100S	DN100	PN40	1128	190	235	8	22	Class150	1148	190.5	228.6	8	19.1	323	571	178
		PN63	1152	200	250	8	26	Class300	1168	200.1	254	8	22.3

Parameter	Specification
Accuracy	±0.1% (typical)
Medium	LNG, LPG, cryogenic liquids
Temperature	-200°C to +200°C
Pressure	Up to high-pressure LNG systems
Output	Mass flow / density / temperature
Communication	Modbus, HART, RS485
Protection	Explosion-proof optional (ATEX/IECEx)

Our Advantages

Our company has extensive experience in cryogenic flow measurement and industrial metering applications, specializing in Coriolis mass flow meters for LNG, CNG, hydrogen, and industrial gas systems. We provide professional flow meter selection support, system integration, and customized engineering solutions based on specific customer operating conditions.

Our flow measurement solutions are designed for high stability, fast response, and easy installation, meeting the requirements of high-precision flow measurement for global oil & gas, energy, and industrial customers.

We support full OEM/ODM customization, including different sizes, process connection types, communication protocols, and international certification options to meet project-specific requirements.

Our Key Advantages

1. Advanced DSP Digital Signal Processing Technology

We adopt advanced DSP (Digital Signal Processing) technology, enabling higher measurement accuracy, wider turndown ratio, faster response, and more stable operation compared with traditional analog systems. This ensures reliable performance in demanding LNG and cryogenic applications.

2. High-Pressure Gas Measurement Capability

Unlike conventional mass flow meters mainly used for liquid measurement, our Coriolis flow meters are designed for high-pressure gas applications, including CNG and industrial gas systems. This makes them ideal for high-pressure energy measurement and gas flow monitoring applications.

3. Industry-Leading High-Pressure Aging Process

We have developed a high-pressure aging test platform for all CNG and gas flow meters. Each unit undergoes long-duration stress testing to ensure long-term stability and eliminate performance drift caused by high-pressure operation in real working conditions.

4. Excellent Zero Stability Performance

Our sensor manufacturing process uses high-precision machining and strict quality control to ensure excellent zero-point stability, comparable to leading international brands. This guarantees consistent accuracy in long-term operation.

5. Multi-Parameter Measurement Technology

Based on advanced DSP technology, our Coriolis mass flow meters provide real-time multi-parameter output, including:

• Mass flow
• Volume flow
• Density
• Temperature
• Device status information

With Modbus RS485 communication, users can easily integrate the flow meter into DCS/PLC systems. For liquid applications, accuracy can reach up to ±0.2% or better depending on conditions.

6. Intelligent Self-Diagnosis Function

The flow meter features built-in self-diagnostic capability. When abnormal conditions occur, fault codes can be read via configuration software or handheld devices, helping users quickly identify and resolve issues, improving system reliability and maintenance efficiency.

7. Industrial Standard Communication Protocols

Our products support standard industrial communication protocols such as:

• Modbus RTU
• HART (optional)
• RS485

This ensures easy integration with SCADA, PLC, and industrial automation systems.

8. Industry-Leading Cryogenic Calibration Platform

We have built a dedicated cryogenic calibration system using liquid nitrogen (-196°C), which is lower than LNG operating temperature. This allows true cryogenic calibration for every LNG Coriolis flow meter, ensuring high accuracy and stability in real LNG applications.

This platform is widely used for LNG custody transfer and cryogenic flow meter validation.

9. High Customization Capability

We provide flexible engineering customization for special applications, including:

• Non-standard flow ranges
• Special process connections
• High-pressure or cryogenic designs
• Application-specific communication protocols
• Industry-specific certification requirements

This allows us to deliver tailor-made Coriolis flow meter solutions for LNG, CNG, hydrogen, and industrial gas systems.

a. (Left picture)The optimal vibration mode of flowmeters is determined after the finitement analysis, the structure is improved and the modal in each order is reasonably distributed. Driven by the simple harmonic, each position of the measuring tube will respond. A reasonable damped structure has been designed to improve the noise-proof feature.

b. (Right picture)The  high-performance   32/40-bit  DSPs  are  used   as  the   core  processor,   including  high efficiency  instruction  set,  hardware  FFT and  
other peripherals  specially  used  for  audio  signal processing to fast process various digital signals in real time and largely improve the stability of flowmeters.

c. The mass flowmeter is welded by the unique vacuum brass solder process, which ensures the welding quality and also fully guarantees the stress removal to largely improve the zero stability of mass flowmeter in use.

d. Water gauge calibration testing platform: The Company owns the scarce calibration systems and  stability  testing  system  for  water  gauges  with  large-span  diameter  (DN6-DN400)  in  the industry for the operating condition calibration and the stability testing of flowmeters.
e. High pressure gas testing platform: The Company has established the first high pressure air (25MPa)  calibration  system  and  stability  testing  system  in  China  for  the  operating  condition calibration and the stability testing of high-pressure flowmeters.

f. Liquid nitrogen low-temperature calibration testing platform: The Company has established the first copious cooling calibration system and stability testing system in China for the operating condition calibration and the stability testing of low-temperature flowmeters.

Performance Comparison Table of Andisoon Coriolis mas  Flow Meter and European and American Coriolis mas Flow Meter

Comparison items	Andisoon	Product 1 from European or America		Product 2 from European or America	China Domestic related products
Signal processing technique	DSP processing	DSP processing		DSP processing	Analogue signal processing
Fault predication	Self-diagnosis	Self-diagnosis		Self-diagnosis	None
Nominal liquid medium accuracy	0.15%	0.15%		0.15%	0.5%
Nominal gas medium accuracy	0.5%	0.5%		0.5%	1.0%
Measured small flow error	Good	Good		Poor	Poor
Period stability	Good	Average		Good	Average
MVD technology application	Yes	Yes		Yes	None
Vacuum heat preservation technology	Yes	None		None	None
Factory calibration methods	Simulated real  flow calibration	Some simulated real flow calibration		Some simulated real flow calibration	Water gauge
Market price	Moderate	Very high		Very high	Relatively low
Customer maintenance cost	Low plate-level  maintenance cost	High overall replacement cost	High overall replacement cost		High overall replacement cost

Company Profile

We are a professional Coriolis mass flow meter manufacturer with extensive experience in custody transfer measurement and integrated metering system solutions for the global oil & gas industry.

Our Coriolis flow meters are widely used in LNG cryogenic applications, hydrogen refueling systems, oil & gas production, and industrial gas measurement, providing high-accuracy and reliable flow measurement in demanding process conditions.

The instruments deliver mass flow accuracy up to ±0.1% and repeatability up to ±0.05%, with optional density and temperature measurement for advanced process control and energy calculation. They are designed for stable performance in cryogenic, high-pressure, high-temperature, and vibration environments, with a wide turndown ratio suitable for both low and high flow conditions.

Our Coriolis flow meters support industrial communication protocols including Modbus RTU, HART, and RS485, enabling seamless integration with DCS, PLC, and SCADA systems, as well as remote monitoring and diagnostic functions for improved operational efficiency.

Certifications include EAC, SIL2, QAN/QAR, with optional ATEX/IECEx explosion-proof certification for hazardous area applications.

Our products have been successfully applied in LNG metering skids, custody transfer systems, LNG terminals, and industrial gas projects worldwide.

Technical datasheets, installation & operation manuals, and relevant project reference cases are available upon request for evaluation and engineering support.

Why choose uS?

Through many tests and improvements, ANDISOON summed up our experience and finally determined an inlet and outlet combined splitter cone, vacuum nickel-based brazing and heat treatment technology suitable for the CNG flowmeter produced by our company.

1. Imported combined splitter cone (obtained utility model patent - patent number: 201020170649.5)

The inlet end and the outlet end are structurally symmetrical and are connected by a pipe body. The inlet end and the outlet end are composed of an interface joint, a shunt cone, two measuring tubes and a measuring tube joint, wherein the interface joint and the measuring tube joint form a The two are docked and positioned with a shunt cone. The measuring tube is inserted into the measuring pipe joint and then welded. The shunt cone is inserted into the measuring tube and the measuring pipe joint. The measuring tube and the shunt cone maintain a tight positioning fit.
The measuring tube and the measuring tube joint are welded by argon arc welding; the diverter cone is inserted into the inner hole of the measuring tube joint in the axial and radial directions, and the diverter cone is positioned in conjunction with the measuring tube in the circumferential direction.
The interface joint is placed on the diverter cone, so that the outer cone surface of the diverter cone and the inner cone surface of the interface joint are positioned axially, and the inner hole of the interface joint is positioned radially. The interface joint and the diverter cone are also integrally pressed. Tight and welded with argon arc welding.

Beneficial effects:
When used in CNG flowmeters, this utility model can effectively improve the yield of CNG flowmeters, reduce the overall production cost, and scientifically ensure the overall performance of the CNG flowmeter. Moreover, this method and structure also have the characteristics of easy parts processing, low cost, and easy assembly and welding. The application of this method and structure will be of great help to the development of low-priced, high-performance domestic CNG flow meters, and will lay a solid foundation for the market dominance of domestic CNG flow meters.

2. Vacuum nickel-based brazing and heat treatment (obtained invention patent - patent number: 201010186127.9)

This process is completed according to the process flow of parts positioning, parts calibration, surface treatment, solder laying, vacuum welding and vacuum insulation, and cooling out of the furnace. It effectively solves the problem of CNG flowmeter failure caused by uneven heating of the measuring tube due to conventional silver-based manual soldering. Performance is greatly reduced.
After this process is applied in the production process of CNG flow meters, the deformation of the measuring tube and the uneven internal stress are minimized, which greatly improves the performance of the CNG flow meter. The yield can reach 95% and the overall cost is reduced. It is suitable for CNG flow. Large-scale mass production of CNG flow meters; it can bring the overall technology and accuracy of CNG flow meters to a new level; it will be of great help to the development of low-priced, high-performance domestic CNG flow meters and create a better market for domestic CNG flow meters. Dominance has laid a solid foundation.

3. High-precision time difference detection technology

It is used for high-precision time difference testing of mass flow meters. The time difference measurement can reach within 0.3 nanoseconds, ensuring high accuracy of measurement; it adopts DSP (digital signal processing) technology and can effectively replace imported products.

1) Adaptive linear digital filtering technology

It can filter out the interference waveform of the output current of the mass flow meter sensor. Linear filtering does not affect the linear characteristics of the flow meter. In addition, because the transmitter needs to adapt to sensors with multiple natural frequencies, an adaptive algorithm is designed to achieve frequency adaptation. Ensure the versatility of the filtering algorithm.

2) Weak signal detection circuit based on high-precision differential analog operational amplifier

It belongs to the circuit design of the mass flow meter. The design of the voltage follower prevents the output from affecting the input. The design of the differential circuit effectively suppresses common mode interference signals. It has strong anti-interference performance, low detection signal amplitude and high accuracy.

3) Adaptive broadband oscillation technology based on frequency sweep algorithm

Used for mass flow meters, it has a wide frequency sweep range and fast frequency sweep speed, effectively ensuring the detection of the center frequency. Different sensors can be set to different frequency sweep ranges.

4) Synchronous phase tracking technology for constant measurement of tube resonance amplitude

It is used in mass flow meters to ensure that the resonance amplitude of the measuring tube is stable, the fluctuation is small, and the phase synchronization can be achieved within 6°.

Certifications

Certifications include EAC, SIL2, QAN/QAR, with optional ATEX/IECEx explosion-proof certification for hazardous area applications.

FAQ

Q1: Can Coriolis flow meters be used for LNG custody transfer?

Yes, Coriolis meters are widely used for LNG custody transfer due to high accuracy and direct mass measurement.

Q2: What is the accuracy of LNG Coriolis flow meters?

Typically up to ±0.1% depending on model and installation conditions.

Q3: Can it be used in LNG refueling stations?

Yes, it is widely used in LNG dispensers and refueling stations.

Q4: What communication protocols are supported?

Modbus RTU, HART, RS485 are available.