Ultrasonic flowmeter is a non-contact instrument, which can measure the flow of medium with large diameter and can also be used for the measurement of medium that is not easy to contact and observe. Its measurement accuracy is very high, and it is hardly disturbed by various parameters of the measured medium.
The correct selection of ultrasonic flowmeter can ensure better use of ultrasonic flowmeter. What type of ultrasonic flowmeter should be selected should be determined according to the physical and chemical properties of the fluid to be measured, so that the diameter, flow range, lining material, electrode material and output current of the ultrasonic flowmeter can be adapted to the properties of the fluid to be measured. and flow measurement requirements.
1. Precise functional inspection
Accuracy grade and function Select the instrument accuracy grade according to the measurement requirements and application occasions, so as to be economical and cost-effective. For example, in the case of trade settlement, product handover and energy measurement, a higher accuracy level should be selected, such as 1.0, 0.5, or higher; for process control, different accuracy levels should be selected according to control requirements; some only It is to detect the process flow without control and measurement. You can choose a slightly lower accuracy level, such as 1.5, 2.5, or even 4.0. At this time, you can choose a low-cost insertion ultrasonic flowmeter.
2. Measurable medium
Measuring medium flow rate, instrument range and caliber When measuring general medium, the full-scale flow rate of the ultrasonic flowmeter can be selected within the range of 0.5-12m/s of the measured medium flow rate, and the range is relatively wide. The specification (diameter) of the selected instrument is not necessarily the same as that of the process pipeline. It should be determined within the range of the flow rate depending on whether the flow rate range is measured, that is, when the flow rate of the pipeline is too low and cannot meet the requirements of the flow meter or the measurement accuracy cannot be guaranteed at this flow rate , it is necessary to reduce the diameter of the instrument, so as to increase the flow rate in the pipe and obtain satisfactory measurement results.