Ultrasonic Gas Flow Meter
Gas Ultrasonic Flowmeter is produced by advanced German technology. All its key components are imported from original equipment, featuring high reliability and long service life. It is a new type of precision measuring instrument with high precision and high reliability. It can be widely applied to gas flow measurement in urban gas, petroleum, chemical industry, electric power, metallurgy, and other industries.
|NO.||SI-Ultrasonic Gas Flow Meter|
|Product Origin||Shaanxi, China|
|Lead Time||3-5 days after payment received|
|Diameter DN（mm）||Model||Starting flow（𝑚3⁄ℎ ）||Range ratio||Measuring range（𝑚3⁄ℎ ）||Measurement accuracy（3⁄ℎ )|
|Measurement accuracy（3⁄ℎ )|
|Item||PUA Gas Ultrasonic Flow Meter|
|Accuracy||1.4% , Repeatability: 0.4%|
|1.0% , Repeatability: 0.2%|
|Input signal||Flow signal: 200 KHz±10%|
|Temperature signal: analog signal output by the temperature sensor|
|Pressure signal: analog signal output by the pressure sensor|
|Output||Pulse / RS485|
|Press||1.6Mpa, 2.5MPa, 4.0MPa, 16MPa, 40MPa|
|Power||24VDC or 3.6V Lithium battery|
|Power consumption||Internal power supply: average power consumption ≤1.5mW,|
|two lithium batteries can be used continuously for more than 6 years.|
|External power supply: average power consumption ≤1W|
Bi-directional flow measurement over a wide dynamic range (turndown ratio: 100: 1). When the flow direction of the pipeline medium changes, there is no need to change the ultrasonic flowmeter.
Integrated Volume Correction
Integrated volume correction to standard conditions (using pressure and temperature measurement). High precision temperature and pressure compensation, volume correction.Intelligent switching of various gas working conditions and standard temperature and pressure.
No Pressure Loss
No flow blocking device, no pressure loss in the pipeline. Multiplex Dual Channel and Six Channel Measurement. Make the measurement more accurate.
Independent of Gas
Largely independent of gas density and composition. High precision temperature and pressure compensation, volume correction.
Natural Gas Storage
With the demand for gas grows, the storage capabilities for gas are increasingly playing a vital role to keep a nation’s gas supply secure and flexible. Sino-Inst’s Ultrasonic Gas Flow Meters offers an Effective measurement solution to control the flow volume of the natural gas transported from the onshore storage terminal to the offshore platform, i.e the storage pit, and back from the storage to delivery.
Fuel Gas Measurement
For the firing of the duct burners, natural gas and refinery gas is used in different mixtures depending on the availability of the refinery gas. The duct burner fuel gas is conditioned by a fuel gas skid which mixes the different gases, regulates the heating value as well as gas pressure and enables a balanced supply to the individual burner elements.
As the core control element, a gas flowmeter is required which can accept different gas compositions, offers a high turndown ratio and is insensitive to dynamic flow changes. The reliability of the flowmeter has a direct influence on the reliability and availability of the entire plant.
- Custody transfer applications (natural gas, N2, O2, air, ethylene)
- Onshore and offshore applications
- Steam flow measurement
- Underground gas storage facilities (bidirectional measurement possible)
- Cryogenic gas applications down to –194 °C
- Process metering and control of gases, air flows, etc.
- For gas with high H2S components such as sour gas or biogas.
- Natural gas production, transport, storage and distribution
- Underground gas storages (UGS) Non-custody transfer (CT) gas applications
- Process and hydrocarbon gases
- Natural gas and compressed air consumption and other auxiliary service and supply line applications
Ultrasonic meters are velocity meters by nature. Ultrasonic method to measure gas flow, time-transit method is almost the only choice. The time difference method is currently the measurement principle method used in gas ultrasonic flow meters. The gas ultrasonic flowmeter is mainly composed of three parts: an ultrasonic transducer group, a signal processing circuit and an integrated calculation system. The ultrasonic transmitting transducer transmits the ultrasonic beam through the measured fluid, and the ultrasonic receiving transducer converts the received signal into an electrical signal after being amplified and filtered and is integrated into the integrated calculation system to finally realize the flow detection. Refer to Figure 1
Ultrasonic flowmeters use sound waves to determine the velocity of a fluid flowing in a pipe. At no flow conditions, the frequencies of an ultrasonic wave transmitted into a pipe and its reflections from the fluid are the same. Under flowing conditions, the frequency of the reflected wave is different due to the Doppler effect. When the fluid moves faster, the frequency shift increases linearly. The transmitter processes signal from the transmitted wave and its reflections to determine the flow rate.
Transit time ultrasonic flowmeters send and receive ultrasonic waves between transducers in both the upstream and downstream directions in the pipe. At no flow conditions, it takes the same time to travel upstream and downstream between the transducers. Under flowing conditions, the upstream wave will travel slower and take more time than the (faster) downstream wave. When the fluid moves faster, the difference between the upstream and downstream times increases. The transmitter processes upstream and downstream times to determine the flow rate. They represent about 12% of all flowmeters sold.