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technical article
Magnetic flap level meter principle, installation, use should pay attention to issues
2012-1-31 10:47:04

Principle of magnetic flap liquid level gauge:


The magnetic flap liquid level indicator is installed on the outside or above of the tub, which is used to indicate and control the seal inside the tub. A drain valve can be added as required. A control instrument that can accept customized liquid level in the connection flange. The indicator is made of magnetic color chip.

Composition, when the magnetic float in the body tube rises with the liquid level, the color film is flipped to display the liquid level height. It is also possible to install a magnetic switch or remote transmitter on the body tube to output a switch signal or an analog signal. Suitable for high temperature,

High voltage, anti-corrosion and other occasions can be displayed and controlled remotely. The body pipe is made of seamless steel pipe, and the connecting pipe is welded with pull holes, and there is no scratch inside. The installation method can be side or top, and the lower end of the body is sealed.


Product purchase:


This product is also called magnetic level gauge, magnetic flip column level gauge, magnetic float level gauge.It uses the principle of magnetic coupling to work.The product makes up for the glass tube level gauge which cannot work under high temperature and high pressure and is fragile. Multiple disadvantages.


There are two installation methods, side-mounted and top-mounted, no matter which method can be bundled with a remote transmission device, so that the liquid level gauge can display the liquid level on the spot and remotely monitor the liquid level. It can be called a remote transmission magnetic flap level gauge.


,如果未经质监局审核,没有生产许可证,产品质量是难以得到保证的 Although the process of making the magnetic flap liquid level gauge is very simple, the magnetic flap liquid level gauge is used as a measuring instrument, especially the remote transmission magnetic flap liquid level gauge . If it has not been audited by the Quality Supervision Bureau, there is no production license, and the product Quality cannot be guaranteed

Therefore, when purchasing a magnetic flap level meter, choose a manufacturer with a production license and a good reputation. The price may be slightly higher, but the product quality is guaranteed and the after-sales service is guaranteed.


Product use:


The glass plate level gauge can be directly used to observe the liquid level height of various media in the container. It is suitable for liquid level indication in petroleum, chemical and other industrial fields. The liquid level gauge has a simple structure, intuitive and clear observation, no clogging, no leakage, installation

Convenient and easy maintenance. The upper and lower mounting flanges of the glass plate level gauge are connected to the container to form a connector. The actual height of the liquid level in the container can be directly observed through the glass plate. The upper and lower valves are equipped with safety steel balls.

When damaged, the steel ball is automatically sealed under the pressure of the container to prevent the liquid in the container from overflowing and to ensure the safety of the operator.

使用应该注意: Attention should be paid to the use of the magnetic flap liquid level gauge :

1) The magnetic flap liquid level gauge must be installed vertically. A ball valve should be installed between the magnetic flap liquid level gauge and the container guide tube to facilitate maintenance and cleaning. The installation position of the magnetic flap liquid level gauge should avoid or stay away from the material medium. Entrance and exit, avoid material flow

Rapid changes in local areas affect the accuracy of liquid level measurement;

2) The medium should not contain solid impurities or magnetic substances, so as to avoid blocking the float;

3) Prior to use, the small balls below the zero position should be set to red and the other balls should be set to white;

4) Open the bottom flange and install the magnetic float (note: the heavy end with the magnetic end is up and cannot be inverted).

5) When debugging, first open the upper lead valve, then slowly open the lower valve to allow the medium to enter the main pipe smoothly.

Is the white ball flipped normally? Then close the lower inlet valve and open the drain valve to lower the liquid level in the main conduit. Operating this method three times is indeed normal. The pressure transmitter can be put into operation (except for special liquids such as corrosive)

Installation of magnetic level gauge


First, there must not be any magnetically conductive material around the magnetic flap level gauge, and it must not be fixed with iron wire, because this will affect the normal operation of the magnetic flap level gauge;


Second, the magnetic flap liquid level gauge must be installed vertically, a ball valve should be installed between the magnetic flap liquid level gauge and the container's guide tube to facilitate maintenance and cleaning;


3. If the user adopts the heat tracing pipeline by himself, then non-magnetic materials must be selected, such as copper pipes. The heat tracing temperature is also determined according to the condition of the medium;

在使用前应该先用校正磁钢将零位以下的小球设置成红色,其它球设置成白色; Fourth, before using the magnetic flap level meter, use calibration magnetic steel to set the small balls below zero to red and other balls to white;


5. The inside of the measured medium should not contain solid impurities or magnetic substances, to avoid blocking the float;


6. Open the bottom flange of the magnetic flap liquid level gauge and install the magnetic float (note that the heavy end with the magnetic end is up and cannot be inverted).

7. The main pipe should be cleaned irregularly to remove impurities according to the condition of the measurement medium;


8. For the liquid level gauge exceeding a certain length, it is necessary to increase the intermediate reinforcement flange or ear support as a fixed support to increase strength and overcome its own weight;


Nine, when debugging, you should first open the upper valve, and then slowly open the lower valve to allow the medium to enter the main pipe smoothly.

Accuracy), observe whether the magnetic red and white ball flip is normal. Then close the lower inlet valve and open the drain valve to lower the liquid level in the main conduit. If you operate this method three times, which is normal, you can invest

Operation (except for special liquids such as corrosive);


X. The installation position of the magnetic flap level meter should avoid or stay away from the inlet and outlet of the material medium to avoid the accuracy of the level measurement due to rapid changes in the local area of the material fluid;


Eleven, when equipped with remote transmission supporting instruments need to do the following:


1. The remote supporting instrument should be close to the main pipe of the level gauge and fixed with stainless steel hoop (note that it should not be made of iron);


2. The sensing surface on the remote transmission supporting instrument should face and close to the main duct;


3. The zero position of the remote supporting instrument should be on the same level as the zero indication of the liquid level gauge;


4. The connection between the remote transmission supporting instrument and the display instrument or industrial control computer should be laid separately through a protective tube or a shielded two-core cable;


5. After laying the wire entry hole of the junction box, it is required to be well sealed to avoid the invasion of rainwater and moisture and prevent the remote transmission supporting instruments from working properly. The junction box should be covered in time after the maintenance or commissioning is completed.