- Gas ultrasonic flowmeter
Gas ultrasonic flowmeters boast high measurement accuracy, zero pressure loss, no wear parts, a long service life, a wide measurement range, bidirectional measurement capability, and the ability to measure pulsating flows. When compared to other types of flowmeters, gas ultrasonic flowmeters clearly exhibit more superior performance characteristics. Since their introduction to the market, they have received widespread praise from users. Currently, gas ultrasonic flowmeters are predominantly chosen for trade metering in various natural gas pipelines under construction in China. For instance, the flowmeters used in the West-East Gas Pipeline are gas ultrasonic flowmeters.
- Thermal mass flowmeter
The Mass Flow Meter (FFM)/Mass Flow Controller (FFC) is used for precisely measuring or controlling the mass flow rate of gas. The flow sensor of the thermal gas mass flow meter, the pipeline-type thermal mass flow meter, is a thermal mass flow sensor. The thermal gas mass flow meter consists of a sensor, a flow divider, a main channel, and a circuit board, and is used for measuring flow rate. In addition to having similar components as the MFM, the MFC also includes a control valve and a PID control circuit. It can not only measure flow rate but also control it.
- Thermal gas flowmeter
Thermal gas flowmeters operate based on the thermal diffusion principle, which is a technology that exhibits excellent performance and high reliability under harsh conditions. Their typical sensing elements include two thermal resistors (platinum RTDs), one serving as a velocity sensor and the other as a temperature sensor for automatic compensation of gas temperature changes. When the two RTDs are placed in the medium, the velocity sensor is heated to a constant temperature above the ambient temperature, while the other temperature sensor senses the medium temperature. The mass flow rate of gas flowing through the velocity sensor is calculated based on the amount of heat transferred by the sensing element. As the gas flow rate increases, the amount of heat carried away by the medium increases, causing the sensor temperature to decrease. To maintain a constant temperature, the operating current through the sensor must be increased, and the magnitude of this increased current is proportional to the flow rate of the medium.
- Gas vortex flowmeter
The gas vortex flowmeter is primarily used for measuring the flow rate of gas or steam medium fluids in industrial pipelines. It features low pressure loss, a wide measurement range, and high accuracy. When measuring volumetric flow under operating conditions, it is generally unaffected by parameters such as fluid density, pressure, temperature, and viscosity. With no moving mechanical parts, it boasts high reliability and requires minimal maintenance. The instrument parameters remain stable over a long period of time. The gas vortex flowmeter employs a piezoelectric stress sensor, which ensures high reliability and can operate within an operating temperature range of -20°C to +250°C. It offers both analog standard signals and digital pulse signal outputs, making it easy to use with digital systems such as computers. It is a relatively advanced and ideal flow meter.
- Gas mass flowmeter
The thermal gas mass flowmeter can be used for both gas flow measurement and process control. It is produced with excellent technology introduced from the United States, and it directly measures the mass flow of fluid without temperature and pressure compensation. Its characteristics include: no moving parts; low pressure loss; wide measurement range; high accuracy; high reliability; simple installation, and convenient operation.
