What are the precautions for Doppler flowmeter?

2025-07-31 15:03:59

The correct selection of Doppler flowmeter can ensure better use of ultrasonic flowmeter, and the selection of ultrasonic flowmeter should be based on the physical and chemical properties of the measured fluid medium. The diameter, flow range, lining material, electrode material, output current, etc. of the ultrasonic flowmeter can adapt to the properties of the measured fluid and the requirements of flow measurement.

1. Function check

The accuracy level and function of the instrument should be selected according to the measurement requirements and usage scenarios, which is cost-effective. For example, for trade settlement, product handover, and energy measurement, higher accuracy levels such as 1.0, 0.5, or higher should be chosen; For process control, choose different accuracy levels according to control requirements; Some only need to detect the process flow without precise control and measurement, and can choose lower accuracy levels, such as 1.5, 2.5, or even 4.0. In this case, cheaper plug-in ultrasonic FLOW METERs can be chosen.

2. Measurable medium

When measuring medium flow rate, instrument range, and caliber for general media, the full-scale flow rate of an ultrasonic flowmeter can be selected within the range of 0.5-12m/s for measuring medium flow rate, which is relatively wide. The selected instrument specifications (caliber) may not necessarily be the same as the process pipeline, and should be determined based on whether the measured flow range is within the flow rate range. That is, when the pipeline flow rate is too low to meet the requirements of the Flow instrument or the measurement accuracy cannot be guaranteed at this flow rate, the instrument caliber needs to be reduced in order to increase the flow rate inside the pipeline and obtain satisfactory measurement results.