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1. What are the classifications of electromagnetic flow meters? According to the measurement principle and structural characteristics of electromagnetic flow meters, different classifications can be made, including: Xiangdan 1 Electromagnetic induction electromagnetic flowmeter and liquid capacitive electromagnetic flowmeter: These are two common measurement principles of electromagnetic flowmeters. The working principle of an electromagnetic induction flowmeter is based on Faradays law of electromagnetic induction, which measures the flow rate by inducing the magnitude of the electromotive force in the measured medium through a magnetic field. The measurement principle of capacitive electromagnetic flowmeter is to use the capacitance change of the measured liquid between the electrodes to measure the liquid flow rate. 2. Insertion electromagnetic flowmeter and diameter electromagnetic flowmeter: Insertion electromagnetic flowmeter is easy to install and suitable for large-diameter flow measurement. The installation of diameter electromagnetic flow meters is relatively complicated, but the accuracy is relatively high. Full tube electromagnetic flow meters and split type electromagnetic flow meters: Full tube electromagnetic flow meters refer to flow meters that integrate sensors and converters, while split type electromagnetic flow meters separate sensors and converters for installation. Water supply and drainage electromagnetic flow meters and industrial electromagnetic flow meters: Water supply and drainage electromagnetic flow meters are suitable for the water supply and drainage industry, water treatment industry, and other fields, while industrial electromagnetic flow meters are suitable for industrial productio
2. Do you know the principle of electromagnetic flowmeter?
Electromagnetic flowmeter is an instrument for flow measurement based on Faradays law of electromagnetic induction. Its core principles and characteristics are as follows:
1. Working principle Faradays law of electromagnetic induction When a conductive liquid flows vertically in a magnetic field, the charged particles (positive/negative ions) in the liquid will be deflected by the magnetic field, resulting in induced electromotive force (voltage) proportional to the flow velocity on both sides of the pipeline.
. The formula is expressed as: E=B × L × vE: Induced electromotive force (voltage) B: Magnetic field strength L: Inner diameter of the pipeline (electrode spacing) v: Average flow velocity of the liquid. By measuring the induced electromotive force E and combining it with known B and L, the liquid flow velocity v can be calculated, and then the volumetric flow rate can be converted from the cross-sectional area of the pipeline. Structural composition of measuring tube: non-magnetic material (such as stainless steel, polytetrafluoroethylene), lined with insulation material to prevent short circuit. Electrodes: installed in pairs on the inner wall of the measuring tube to detect induced electromotive force. Magnetic field coil: generates a uniform magnetic field perpendicular to the direction of liquid flow. Signal converter: amplifies, processes, and converts weak voltage signals into standard outputs (such as 4-20mA current, pulses, or digital signals).Secondly, the core advantage is minimal pressure loss. There are no obstacles inside the measuring tube (such as impel