A gas flowmeter is an instrument that measures the amount of fluid flowing through a closed system. These devices are also known as mass flow transmitters, and allow for accurate measurements of gas flows over a wide dynamic range. They are ideal for industrial applications and confined spaces. Typically, they work by placing a float into a tapered pipe. As the pressure differential increases, the float rises and falls, and the flow rate is read by a visual scale on the meter. This type of meter is not suitable for measuring extremely high flows, though.
Ultrasonic gas flowmeter is an electronic instrument which can determine the volume of a gas. It has the same functions as traditional flowmeters and is also known by other names such as Ben Fa Ming ha, Ben Fa Qi Ti Liu Liang Ji, and Xin Jiao Dao. In the first and second embodiments, the ultrasonic gas flowmeter comprises threshold value storage unit 7, timekeeping unit 9, calculation unit 10, and storage device. This device can be realized through a computer program.
Gas velocity is obtained from the tu and td peak points, which are the averages of the upstream and downstream ultrasonic signals. This technique requires the simultaneous extraction of all the upstream and downstream ultrasonic signals. Figure 7 illustrates the peak point distribution of all the upstream ultrasonic signals. The calculated average upstream TOF is about 10 m/s and the downstream TOF is about three percent.
Rotary gas flowmeter meters are positive displacement devices that measure the volume of a flow of gases. The mechanism works by displacing finite volumes of gas. Rotary gas meters are a popular choice for high-precision gas volume measurement applications, and Elgas Rotary type meters are particularly suitable for these needs. Besides offering exceptional performance and accuracy, these meters can be easily repaired on-site and come with a wide range of features. They also comply with relevant European standards.
In addition to accurate measurements, these devices are also very compact. These instruments feature built-in memory cards for factory and user settings, and a history record for calibration. A high-strength aluminum alloy casing increases the wall thickness and guarantees long-term system stability. The unit's standard current output is two wires, 4mA. Each meter has its own set of specifications. A high-quality meter is an excellent choice for any application, no matter how large or small.
Orifice meters use the same principles as venturi flowmeters to measure the amount of gas flow. Fluid pours into the orifice, increasing the flow pressure, while the velocity of the fluid is reduced to fit through the small opening. This principle is used in the manufacturing of flow metering equipment. It is also used in the calibration of orifice meters.
One of the most common types of gas measurement is square-edged orifices, but it is not a good practice to ignore its benefits. While designing well-sites, engineers should consider how to configure the tubes for inspection. It is better to use an "inspection tee" than a 90-degree elbow, since the inspection tee allows the flow to go through the branch and out the other.