How to select the liquid level meter correctly

    The correct type selection of liquid level gauge can ensure the better use of liquid level gauge. The type of liquid level gauge selected shall be determined according to the physical and chemical properties of the measured fluid medium, so that the diameter, flow range, lining material, electrode material and output current of the liquid level gauge can adapt to the properties of the measured fluid and the requirements of flow measurement.

1. Precision function check

    Accuracy grade and function: select the accuracy grade of the instrument according to the measurement requirements and application occasions, so as to achieve economic efficiency. For example, for the occasions of trade settlement, product handover and energy measurement, the accuracy level should be higher, such as level 1.0, level 0.5 or higher; For the occasion of process control, different accuracy levels shall be selected according to the control requirements; In some cases where only the process flow is detected without accurate control and measurement, you can choose a slightly lower accuracy level, such as level 1.5, level 2.5, or even level 4.0. At this time, you can choose a low-cost plug-in liquid level gauge.

2. Measurable medium

    When measuring the medium flow rate, instrument range and caliber, the full-scale flow of the liquid level gauge can be selected within the range of 0.5-12m / s of the measured medium flow rate, with a wide range. The specification (caliber) of the selected instrument is not necessarily the same as that of the process pipeline. It should be determined according to whether the measured flow range is within the flow rate range. That is, when the flow rate of the pipeline is low and cannot meet the requirements of the flow instrument, or the measurement accuracy under this flow rate cannot be guaranteed, it is necessary to reduce the diameter of the instrument, so as to improve the flow rate in the pipe and obtain satisfactory measurement results.

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