Cryogenic Flow Meters for Highly Accurate and Reliable Cryogenic Fluids Flow Measurement.
Commonly used Cryogenic Flow Meters include cryogenic turbine flow meters, orifice flow meters, mass flow meters, target flow meters, etc. Representative cryogenic fluids include LNG (liquefied natural gas), LN2 (liquid nitrogen), LO2 (liquid oxygen), liquefied ethylene, liquid hydrogen, liquid chlorine, and these cryogenic gases. LPG (liquefied petroleum gas) is not included in the cryogenic Fluid.
Sino-Inst offers a variety of Cryogenic Flow Meters for Cryogenic fluids flow measurement. If you have any questions, please contact our sales engineers.
Featured Cryogenic Flow Meters
Cryogenic Turbine Flow Meter
The liquid nitrogen flow meter is a commonly used cryogenic flow meter. The low-temperature turbine flowmeter is a dedicated liquid nitrogen flowmeter. It can also be used to measure cryogenic liquids such as liquid oxygen.
Liquid nitrogen refers to liquid nitrogen. Liquid with extremely low temperature. In industrial production, liquid nitrogen can be used as a deep refrigerant. The low-temperature turbine flowmeter is used as a liquid nitrogen flowmeter, which can work at a low temperature of -196°C (-320.8 °F). Liquid Nitrogen Flow Meter’s Turbine sensor structure at ultra-low temperature (-196℃) is made of special customized material, and it is equipped with low-temperature resistant amplifier. Realize the instantaneous and cumulative flow monitoring of liquid nitrogen.
Know more about: Turbine type Flow Meter
Cryogenic Mass Flow Meter
Cryogenic Mass Flow Meter is developed for measuring cryogenic media such as liquefied natural gas. The flow meter consists of a mass flow sensor and a transmitter. Adopting high-efficiency heat insulation technology to effectively control the heat exchange between LNG and other low-temperature media when flowing through the sensor. Reduce the vaporization of LNG and other low-temperature media in the pipeline, thereby reducing the impact of vaporization on flow measurement.
The equipped transmitter uses a digital signal processor (DSP) to process the collected signals and has the ability to judge the real-time state of the medium and other intelligent self-diagnosis functions. Temperature measurement range: -200-350℃.
Extended reading: Liquid Mass Flow Meter
Orifice flowmeter for cryogenic fluid
At present, many flows measuring instruments for extremely low-temperature fluids are orifice flowmeters, and their reliability is also very high.
- The material is 316L;
- In order to prevent fluid leakage caused by cold shrinkage. It is recommended to use welding method to connect, the orifice plate and the pipe use the same material;
- The porous orifice plate has advantages in the flow measurement of very low temperature fluids such as liquefied natural gas. Because the gas that may be generated can flow smoothly downstream from the small holes on the upper part of the orifice plate, and no gas accumulates in front of the orifice plate.
Extended reading: Fluid flow meter types
Target flowmeter for cryogenic fluid
The target flow meter also called a drag force flowmeter. The target flow meter inserts a target (drag element) into the flow field. The target usually is a flat disc or a sphere with an extension rod. There will be a differential pressure. And then target flow meters measure the drag force on the inserted target and convert it to the flow rate. Sino-Inst manufactures target flow meters for liquid, gas, and steam measurement.
It can accurately measure the flow of gas and liquid under various working conditions of normal temperature, high temperature 500℃, and low temperature -200℃;
Read more about Nitrogen Gas Flowmeters-Liquid Nitrogen Flowmeters
How does a cryogenic flow meter work?
Different cryogenic flow meters have different working principles. Here we choose the commonly used target type flowmeter to introduce the working principle.
When the medium flows in the measuring tube, the pressure difference caused by its own kinetic energy passing through the blocking member (target). And has a force on the blocking member. The magnitude of the force is proportional to the square of the velocity of the medium.
The mathematical way is as follows:
F = CdAρ • V2 / 2
In the formula: F —— the force of the choke (kg)
Cd-object resistance coefficient
A ——Axial projection area of the choke on the measuring tube (mm2)
ρ ——Density of medium under working conditions (kg / m3)
the v-average flow velocity of the medium in the measuring tube (m / s)
The force F received by the choke member (target) is transmitted to the capacitive force sensor via a rigidly connected transmission member (stem).
And the capacitive force sensor generates a voltage signal output:
V = KF
In the formula:
V——Voltage output by the capacitive force sensor (mV), K——Proportional constant, F——The acting force of the choke (target)
So, after the voltage signal is pre-amplified, AD converted. And processed by the computer. The corresponding instantaneous flow and the cumulative total can be obtained.
Extended reading: liquid nitrogen level measurement
Liquid Nitrogen-Liquid Oxygen-Liquid Co2 Flow Meter
For the above liquid nitrogen, liquid oxygen, liquid hydrogen and other extremely low temperature liquids, if you need to detect the flow. Then we recommend choosing a very low temperature turbine flowmeter or a gear flowmeter. These two flowmeters can perform excellent flow detection under extremely low temperature conditions.
The low-temperature turbine flowmeter is used as a liquid nitrogen flowmeter, which can work at a low temperature of -196°C (-320.8 °F). The Turbine sensor structure at ultra-low temperature (-196℃) is made of special customized material. Realize the instantaneous and cumulative flow monitoring of liquid nitrogen.
- Nominal diameter:
Common type (0.5～300) mm;
Anti-corrosion type (6～100) mm
Insertion type (80～600)mm
- Medium temperature:
Ordinary type (-20～80)℃
High temperature type (-20～120)℃
Ultra-low temperature type (-196～80)℃
- Ambient temperature: (-20～55)℃;
- Accuracy: ±0.2%, ±0.5%, ±1%;
- Detector signal transmission line system: three-wire voltage pulse (three-core shielded cable);
- Power supply: voltage: 12V±0.144V, current: ≤10mA;
- Output voltage amplitude: high level ≥ 8V, low level ≤ 0.8V;
Gear flow meters are also a good choice for small-caliber liquid nitrogen measurement.
Gear flow transmitter is a type of positive displacement flow transmitter. It is a high-precision transmitter for measuring volume flow.
- High pressure resistance (1.0-45MPa)
- High and low temperature resistance (-196℃-200℃)
- Can measure various viscous media
- High precision and repeatability
- Pulse output/analog output optional
- Wide range ratio (1:100)
- Wide measuring range
- Strong anti-corrosion and anti-fouling ability (acid and alkali)
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Sino-Inst, Manufacturer for Cryogenic Flow Meters. A wide variety of Cryogenic Flow Meters options are available to you.
Sino-Inst’s Cryogenic 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.
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