Flap-11A magnetic level indicator is designed for reliable local liquid level indication in industrial applications that need stronger corrosion resistance and long-term durability. It is made of 316L stainless steel, so it suits most corrosive liquids used in process industries. Because of this, it is a practical choice for chemical plants, wastewater systems, and industrial storage or reaction vessels.
The indicator works on the principle of communicating vessels and magnetic coupling. The chamber is mounted alongside the vessel and connects directly to the process liquid. Inside the chamber, a magnetic float rises and falls with the liquid level. As the float moves, it drives the adjacent bi-color magnetic flaps in the visual indicator. The flaps turn from white to red or from red to white, which gives a clear view of the actual liquid level inside the vessel.
Clear Visual Indication with Durable Seamless Chamber
The Flap-11A magnetic level indicator uses a 51 mm diameter chamber made from high-quality seamless stainless-steel tube. This structure helps reduce common problems such as leakage, weak pressure resistance, poor appearance, and short service life. As a result, the indicator provides more dependable operation in long-term industrial use.
The visual indicator has a broader display area and larger magnetic flaps. This improves both the viewing angle and the visible distance. The larger scale and numerals also make the level easier to read from far away, even at distances of up to 60 meters. Therefore, it works well in installations where operators need clear local reading across larger plant areas.
Practical Design for Process Monitoring and Safety Integration
The instrument is available with IP65 or IP66/67 protection, depending on installation needs. This helps improve performance in wet, dusty, and demanding field conditions. In addition, users can combine the indicator with magnetic switches, compact magnetic switches, and remote transmitters when alarm, switching, or remote signal output is required.
These accessories can support SIL2 / SIL3 functional safety requirements and are available with intrinsically safe and flameproof approvals. Therefore, users can build a more complete monitoring and control system while keeping local level indication simple and visible.
Typical Applications
This magnetic level indicator is widely used in brine filtration tanks, wastewater tanks in membrane electrolysis systems, compound phosphate preparation tanks in hydrogen peroxide units, and other industrial wastewater tanks. It is especially useful where users need a corrosion-resistant local indication solution for process liquids and utility systems.
For other magnetic level solutions, see the [Flap-11S Economical Magnetic Level Indicator] and the [Flap-11C Plastic Magnetic Level Indicator]. The indicator can also work with a [remote transmitter] when remote signal output is required.
