Only by correctly selecting the type of ultrasonic flowmeter can we ensure more accurate measurement and better performance. The type of ultrasonic instrument to be selected should be determined based on the physical and chemical properties of the fluid medium being measured, so that the diameter range, flow range and ultrasonic host output mode of the ultrasonic sensor can adapt to the properties of the fluid being measured and the requirements for flow measurement. .
1. The instrument is divided into temporary detection and fixed detection：
Temporary testing includes handheld ultrasonic and portable ultrasonic instruments. The instrument has a built-in lithium battery and comes with an alloy packaging suitcase. It can be installed at any time to detect the flow of liquid in closed pipelines. Its main function is to detect the accuracy of the original flow meter on the pipeline or for temporary testing. The flow rate of the medium in the pipeline.
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Wall-mounted ultrasonic flow meters, modular ultrasonic flow meters and pipe-type ultrasonic flow meters can measure the instantaneous flow and cumulative flow of liquids in pipelines for a long time. Usually fixedly installed at one point for long-term measurement.
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2. Precision functional inspection：
Accuracy level and functions Select the instrument accuracy level according to the measurement requirements and usage occasions to achieve economical results. For example, when used for trade settlement, product handover and energy measurement, a higher accuracy level should be selected, such as level 1.0, level 0.5, or higher.
When used for process control, different accuracy levels should be selected according to the control requirements; in some cases where it is just to detect the process flow and does not require accurate control and measurement, you can choose a slightly lower accuracy level, such as level 1.5 or even level 2.5. At this time, Inexpensive insertion ultrasonic flow meters can be used.
3. Measurable media：
Measuring medium flow rate, instrument range and diameter When measuring general media, the full scale flow rate of the ultrasonic flowmeter can be selected within the range of measuring medium flow rate 0.5-12m/s, which is relatively wide.
The instrument specification (diameter) selected is not necessarily the same as the process pipeline. It should be determined within the flow rate range according to the measurement flow range, that is, when the pipeline flow rate is 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 to increase the flow rate in the pipe and obtain satisfactory measurement results.