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Magnetic Level Indicator

Flap-11 Magnetic Level Indicator series products are designed based on the law of equilibrium in U connected vessels and magnetic coupling effect to achieve real-time level measurements and display. As liquid level in the vessel varies up or down, magnetic float in the connected chamber rises or falls simultaneously. Because of magnetic coupling effect, float with a permanent magnet actuates magnetic interacted flaps in the display panel which is mounted beside chamber. Associated flaps will flip 180 degree to indicate liquid level. The front and back surface of flaps are coated with two colors respectively (red and white). Generally, when liquid level rises, the magnetic float moves up and makes associated magnetic flaps flip from white to red, and when liquid level drops, associated magnetic flaps flip from red to white. The interface between red and white flaps is the actual indicated liquid level inside the vessel. According to different chemical properties of measured medium, appropriate materials should be selected carefully for the chamber and the magnetic float. In addition, the weight, volume and structure of magnetic float have to be taken into consideration according to different density of measured liquid in order to achieve optimal measuring accuracy.


Jiwei Flap-11 Magnetic Level Indicator series products possess features and strength of similar products in the market. Based on that, Jiwei has carried out extensive study on common problems of existing products in the market, and developed innovative techniques in design and production process to overcome the problems. Jiwei has been focusing on details of manufacturing technologies, strict control of production flow and quality inspection to ensure all products reach the highest level possible on quality and reliability. Jiwei has applied for 7 patents (both invention patents and utility patents) on Flap-11 series products, of which 5 have been authorized and 2 are under approval.


For Flap-11 series products, front protective cover is made of glass panel or acrylic sheet; the end fittings and glass sealing process for indicator are unique designed; the Ingress Protection rating exceeds national standard IP54 and higher level IP65 or IP66/IP67 are achieved, and can be selectable for various applications; the innovative designed magnetic coupling system between floats and flaps greatly improves the reliability of magnetic coupling system and avoids some flaps being mistakenly flipped then causing false reading.


F4 (PTFE)/F46 (FEP) lined chamber is available for Flap-11 Magnetic Level Indicator series product. It is manufactured in special developed lining technologies with multiple patents. F4 (PTFE) lined chamber meets the requirements of majority level measurement applications for strong corrosive liquids with poor permeability and F46 (FEP) lined chamber is suitable for strong corrosive liquids with good permeability, such as liquid chlorine or bromine water.


Compared with similar products of other brands in the market, Jiwei Flap-11 Magnetic Level Indicator series products have the following advantages:
 Distinctive design with broader display panel and magnetic flaps greatly increases both visual distance and viewing angle. With larger sharp scale and digits, display panel appears beautiful and elegant outlook.
 Exceeds national standard IP54, higher level of Ingress Protection IP65 and IP66/67 are selectable for different applications.
 SW-11 Magnetic Switch, SW-21 Compact Magnetic Switch and Reed-11 Remote Transmitter all passed SIL2 / SIL3 Functional Safety Assessment, as well as certified for both Intrinsic Safety and Flameproof Enclosure explosion protection.
 Optional F4 (PTFE)/F46 (FEP) lined chamber manufactured with multiple patented technologies suits for wider range of corrosive liquid level measurement.
 With accessories such as steam / vacuum jacket, electric heater, thermal insulator for applications under various complex working conditions.
 

Flap-11 series products have 4 models for measuring various liquids with different chemical properties:


Flap-11S Economical: 304 stainless steel materials are used to make it practical and economical. It meets requirements for majority industrial conditions and can be applied in mild corrosive liquids level measurement.
Flap-11A Standard: 316L stainless steel is used, with stronger corrosion resistance, suitable for majority weak corrosive liquids.
Flap-11Px Lined model: Chamber is made of 304/316L stainless steel with F4/F46 lining, suitable for strong corrosive liquids.
Flap-11C Plastic: Chamber is made of plastic PP, suitable for low pressure and strong corrosive liquids.
 
Meanwhile, Jiwei also developed Magnetic Switch, Compact Magnetic Switch, and Remote Transmitter to use with Flap-11 Magnetic Level Indicator. The Indicator, Magnetic Switch and Remote Transmitter combine with Flap-11 Magnetic Level Indicator series products can fulfill automatic remote level control.
 
SW Magnetic Switch: Purchased high quality and high-power reed switch in international market as core component.
Reed-11 Remote Transmitter: High quality microprocessor in international market is purchased as its core component. 304 stainless steel is used for the external tube to improve the corrosion resistance and reliability of the product.
Panel-11 Indicator: The base of indicator is made of aluminum alloy. We offer different types of indicator with different Ingress Protection ratings as IP65 and IP66/67 for various applications. Compared with others in the market, Jiwei Panel-11 is designed with broader width which greatly increases the visual distance and viewing angle. With larger sharp scale and digits, the indicator appears beautiful and elegant outlook. Furthermore, the innovative design of magnetic coupling structure between magnetic flaps and magnetic float greatly improves the reliability of the indicator.
 

Among the above accessories, SW-11 Magnetic Switch, SW-21 Compact Magnetic Switch and Reed-11 Remote Transmitter are all passed SIL2 / SIL3 Functional Safety Assessment, and all certified for the highest level of explosion protection achieved so far in the field, including Flameproof Enclosure: Ex d IIC T6 Gb and Intrinsic Safety: Ex ia IIC T6 Ga.

  • Flap-11A Standard Magnetic Level Indicator
    Flap-11A Standard Magnetic Level Indicator

     Display panel with broader design, greatly increases visual distance and viewing angle. With larger sharp scale and digits, display panel appears beautiful and elegant outlook.

     Exceeds national Ingress Protection standard IP54, Ingress Protection rating IP65 and IP66/67 are selectable for different applications.

     Magnetic switch and remote transmitter have all passed SIL2 / SIL3 Functional Safety Assessment, as well as certified for both Intrinsic Safety and Flameproof Enclosure explosion protection.

     Made of 316L seamless stainless-steel tube, suitable for majority corrosive liquids.

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  • Flap-11S Economical Magnetic Level Indicator
    Flap-11S Economical Magnetic Level Indicator

     Display panel with broader design, greatly increases visual distance and viewing angle. With larger sharp scale and digits, display panel appears beautiful and elegant outlook.

     Exceeds national Ingress Protection standard IP54, Ingress Protection rating IP65 and IP66/67 are selectable for different applications.

    ●  Magnetic switch and remote transmitter have all passed SIL2 / SIL3 Functional Safety Assessment, as well as certified for both Intrinsic Safety and Flameproof Enclosure explosion protection.

     Made of 304 seamless stainless-steel tubes, economical and practical.

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  • Flap-11Px Lined Magnetic Level Indicator
    Flap-11Px Lined Magnetic Level Indicator

    The chamber is made of 304 stainless steel lined with PTFE for strong corrosive liquid level measurement. It has been typically applied as follow:

     Level measurement for brine tanks, the caustic circulation tank, the brine de-chlorination tower, the chlorate decomposition tank, the ultra-pure hydrochloric acid storage tank in a membrane electrolysis apparatus.

     Level measurement for storage tanks for liquid chlorine or bromine water.

     Level measurement for ammonia storage tanks.

     Liquid level monitor for the monomer tank at a PVC manufacturing plant.

     Magnetic switch and remote transmitter have all passed SIL2 / SIL3 Functional Safety Assessment, as well as certified for both Intrinsic Safety and Flameproof Enclosure explosion protection.

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  • Flap-11C Plastic Magnetic Level Indicator
    Flap-11C Plastic Magnetic Level Indicator

     Lightweight and easy to install, only about 1/5 weight of similar product that made of stainless steel.

     Made of high-quality PP material, stronger corrosion resistance.

     Display panel with broader design, greatly increases visual distance and viewing angle. With larger sharp scale and digits, display panel appears beautiful and elegant outlook.

     Exceeds national Ingress Protection standard IP54, Ingress Protection rating IP65 and IP66/67 are selectable for different applications.

     Magnetic switch and remote transmitter have all passed SIL2 / SIL3 Functional Safety Assessment, as well as certified for both Intrinsic Safety and Flameproof Enclosure explosion protection.

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  • SW-11 Magnetic Switch
    SW-11 Magnetic Switch

     Purchased quality high-power reed switches with higher current rating and longer service life in the international market.

     Electronics housing is made of aluminum alloy and designed with larger internal space for easy wiring.

     Chamber is made of 304 stainless steel for strong corrosion resistance.

     Passed SIL2 / SIL3 Functional Safety Assessment, as well as certified for both Intrinsic Safety and Flameproof Enclosure explosion protection.

     With high Ingress Protection rating IP66/67.


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  • SW-21 Compact Magnetic Switch
    SW-21 Compact Magnetic Switch

    Same as SW-11 Magnetic Switch, SW-21 is also an ideal accessory when combined with Flap-11 Magnetic Level Indicator for remote alarm and control.

     It is skillfully configured, compact and lightweight.

     Purchased high quality high-power reed switch with higher current rating and longer service time as its key parts in international market.

     Made of 304 stainless steel for strong corrosion resistance and durability.

     Passed SIL2 / SIL3 Functional Safety Assessment, certified for both Intrinsic Safety and Flameproof Enclosure explosion protection.

     With high Ingress protection level IP66/IP67.

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  • Reed-11 Remote Transmitter
    Reed-11 Remote Transmitter

     Purchased high quality reed switches in international market, with long service life.

     TI CLT chips for 4~20mA output.

     Passed SIL2 / SIL3 Functional Safety Assessment, as well as certified for both Intrinsic Safety and Flameproof Enclosure explosion protection.

     Ingress Protection rating reaches to IP66/67.

     Chamber is made of 304 stainless steel with strong corrosion resistance.

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  • Panel-11 Indicator
    Panel-11 Indicator

     Direct apparent reading with high sensitivity, longer visual distance and wider viewing angle.

     Aluminum flap and nylon flap are selectable for different temperature applications,

     Ingress Protection rating exceeds national standard IP54, IP65, IP66/67 protection ratings are available for selection.

     Front cover can be made of glass panel (standard), or acrylic sheet.

     Innovative design of magnetic coupling system greatly improves reliability of the product and avoids flaps being mistakenly flipped to cause false reading.

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