Stainless steel LDG electromagnetic flowmeter LDG-250 anti-corrosion electromagnetic flowmeter

Description :

　　This product has measurement value power-off protection and air traffic control alarm function. The flow direction of the fluid can be set, so the installation of the sensor is not limited by the direction of liquid flow and can achieve bidirectional flow measurement.

　　1、 Characteristics:

　　The measurement of flow rate is not affected by changes in fluid density, viscosity, temperature, pressure, and conductivity. The sensor induced voltage signal is linearly related to the average flow rate, resulting in high measurement accuracy (0.3-0.5%).

　　There is no obstruction in the measuring pipeline, so there is no additional pressure loss, which has significant energy-saving significance.

　　There are no movable parts inside the measuring pipeline, so the sensor has a long lifespan.

　　The straight pipe section required for the sensor is relatively short, making it easy to install.

　　Reasonable selection of electrode and lining materials can resist corrosion and wear.

　　2、 Technical parameters:

　　Accuracy level: ± 0.5%, ± 1%

　　Lining materials: polyurethane, chloroprene rubber, polytetrafluoroethylene, etc

　　Electrode materials: stainless steel, Hastelloy, titanium, platinum iridium alloy, etc

　　Connection methods: flange clamping, flange connection, etc

　　Medium temperature: 0 ℃~70 ℃, 0 ℃~130 ℃ (0 ℃~180 ℃)

　　Nominal pressure: 1.0Mpa~32 Mpa

　　Protection level: IP65, IP68

　　Explosion proof mark: ExibBT4

　　Working voltage: 220VAC, 24VDC

　　3、 Structure:

　　1. Magnetic circuit system: Its function is to generate a uniform DC or AC magnetic field. The DC magnetic circuit is implemented by a magnet, which has the advantage of a relatively simple structure and less interference from the AC magnetic field. However, it is easy to polarize the electrolyte liquid inside the measuring tube, causing the positive electrode to be surrounded by negative ions and the negative electrode to be surrounded by positive ions, that is, the polarization phenomenon of the electrodes, and causing an increase in the internal resistance of the two electrodes, thus seriously affecting the normal operation of the instrument.

　　2. Measurement catheter: Its function is to allow the measured conductive liquid to pass through. In order to divert or short-circuit the magnetic flux when the magnetic lines pass through the measurement catheter, the measurement catheter must be made of non-magnetic, low conductivity, low thermal conductivity, and materials with certain mechanical strength. Non magnetic stainless steel, fiberglass, high-strength plastic, aluminum, etc. can be selected.

　　3. Electrode: Its function is to generate an induced potential signal proportional to the measured value Electrodes are generally made of non-magnetic stainless steel and are required to be flush with the lining so that fluid can pass through without obstruction Its installation position should be in the vertical direction of the pipeline to prevent sediment from accumulating on it and affecting measurement accuracy.

　　4、 Selection:

　　Firstly, it is necessary to have a profound understanding of the structural principles and fluid characteristics of flow meters, while also selecting based on the specific situation on site and the surrounding environmental conditions. We also need to consider economic factors. In general, the selection should be made from the following five aspects: ① Performance requirements for flow meters; ② Fluid characteristics; ③ Installation requirements; ④ Environmental conditions; ⑤ The price of the flow meter.

　　Collect data from flow meters for personal selection and decision-making.

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• Stainless steel LDG electromagnetic flowmeter