The VSAN Magnetic Level Indicator (MLI) is a highly reliable and maintenance-free liquid level indication system designed to provide continuous visual level indication for storage tanks, process vessels, boilers, separators, reactors, and pressure vessels. Operating on the proven magnetic coupling principle, the Magnetic Level Indicator ensures accurate, safe, and clear level monitoring without direct contact between the process liquid and the indicating mechanism.
Unlike conventional glass level gauges, the VSAN Magnetic Level Indicator offers superior safety by completely isolating the process fluid inside a sealed chamber. This eliminates the risk of leakage, glass breakage, and exposure to hazardous, corrosive, toxic, flammable, or high-pressure process media. It is therefore widely preferred for critical industrial applications requiring safe and reliable level indication.
The system consists of a measuring chamber, magnetic float, magnetic indicator assembly, and process connections. A specially designed float containing a high-strength permanent magnet moves freely inside the chamber according to the liquid level. As the float rises or falls, its magnetic field actuates a series of bi-color magnetic indicator flaps mounted externally on the chamber. The flaps rotate through 180°, typically changing from white to red, providing a highly visible indication of the liquid level from a considerable distance.
The VSAN Magnetic Level Indicator is suitable for measuring a wide range of liquids including water, condensate, steam, diesel, crude oil, lubricating oil, hydraulic oil, chemicals, acids, alkalis, LPG, ammonia, solvents, edible oils, liquid fertilizers, cryogenic liquids, and other compatible process fluids. It is designed for operation under both atmospheric and high-pressure process conditions.
Manufactured using premium-quality materials such as SS304, SS316, SS316L Stainless Steel, Hastelloy C, Monel, Duplex Stainless Steel, Titanium, PVC, PP, PTFE, and other corrosion-resistant alloys, the Magnetic Level Indicator provides excellent resistance against corrosion, high temperature, high pressure, and aggressive chemicals.
The VSAN Magnetic Level Indicator can be supplied with optional accessories including Magnetic Reed Switches, Magnetic Float Switches, Level Transmitters, 4–20 mA Continuous Output, HART Communication, RS485 Modbus RTU, Local Digital Display, High & Low Level Alarms, and Remote Level Monitoring, enabling seamless integration with PLC, DCS, SCADA Systems, Industrial Automation Networks, and Process Control Systems.
The indicator is available in Side Mounted, Top Mounted, Boiler Type, Bypass Chamber Type, Cryogenic Type, High Pressure Type, and Custom Engineered Designs, making it suitable for almost every industrial level measurement application.
Designed for long-term industrial service, the VSAN Magnetic Level Indicator features a rugged weatherproof construction with minimal maintenance requirements. Since there are no external moving mechanical parts in contact with the process fluid, the system offers exceptional reliability, long operational life, and consistent performance even under harsh operating conditions.
The VSAN Magnetic Level Indicator is widely used in Oil & Gas Industries, Petrochemical Plants, Chemical Processing Industries, Power Plants, Boiler Systems, Water & Wastewater Treatment Plants, Pharmaceutical Industries, Food & Beverage Processing, Steel Plants, Marine Applications, LNG & LPG Storage, Fertilizer Plants, Paper & Pulp Industries, Mining Industries, Storage Tank Farms, OEM Equipment, and Industrial Automation, where continuous, safe, and accurate liquid level indication is essential.
With its robust construction, advanced magnetic coupling technology, and excellent compatibility with modern automation systems, the VSAN Magnetic Level Indicator provides a dependable solution for continuous liquid level monitoring in demanding industrial environments.
The VSAN Magnetic Level Indicator operates on the Magnetic Coupling Principle.
The process liquid enters the external measuring chamber through the process connections, maintaining the same liquid level as inside the storage tank based on the principle of communicating vessels.
A specially designed float containing a permanent magnet moves freely inside the chamber as the liquid level changes.
The magnetic field from the float passes through the chamber wall and magnetically actuates the externally mounted bi-color indicator flaps. As the float moves upward or downward, each flap rotates by 180°, changing its visible color from white to red (or vice versa), thereby providing a clear visual indication of the liquid level.
Optional magnetic reed switches or magnetostrictive transmitters detect the float position and convert it into switching signals or a continuous 4–20 mA output for transmission to PLC, DCS, SCADA systems, or process controllers for remote monitoring, alarm generation, and process automation.
Since the indicator mechanism is completely isolated from the process fluid, it provides highly reliable, leak-free, and maintenance-free level indication even under high-pressure, high-temperature, and corrosive process conditions.
The VSAN Magnetic Level Indicator is widely used for continuous level indication in critical industrial applications.
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