Magnetic Level Gauge

In the Magnetic Level Gauge, the continuous measurement of the level of the liquid is done using the help of a magnetic float and an external indicator chamber.

In the side-mounted versions, there is an indicator that operates bi-color indicator rollers in such a way that the level of liquid is indicated clearly without the need of any glass viewing chamber.

The top-mounted versions are made available for underground tanks, sumps, and other storage tanks when side mounting is not possible.

With the availability of the 4-20mA transmitters or the level switch or alarms, it becomes very easy to integrate the gauge with the PLC or DCS systems.

• Operates on a simple and reliable magnetic principle.
• Safe level indication for hazardous, high-pressure applications.
• Float with permanent magnet moves freely inside the sealed chamber.
• External bi-color capsule or roller provides clear level indication.
• No direct contact between the indicating system and process fluid.
• Optional magnetic switches and level transmitter for remote monitoring.
• Rugged construction for long service life.
• Suitable for corrosive and high-temperature liquid applications.

• Application: Acids, Alkalies, Solvents, Oils, Lubricants, Condensate Water
• Specific Gravity: Minimum 0.7
• Viscosity: Up to 250 cP
• Design Temperature: -20°C to 400°C
• Design Pressure: Up to 25 Kg/cm²
• C/C Distance: 300 to 4000 mm

Balancing of Liquid Levels

The Magnetic Level Gauge is connected to the process vessel via the bypass chamber. As the liquid level in the vessel changes, the liquid level in the bypass chamber also rises and drops to the same level.

Movement of Magnetic Float

The magnetic float moves with the liquid level in the sealed chamber. In case of corrosive processes, the gauge may be provided with the appropriate materials or PTFE lining based on the process requirement.

Indication of Liquid Level

The magnetic flux generated by the float actuates the rollers/follower indicator outside the chamber through the magnetic linkage without touching the process fluid, thus indicating the level of the liquid.

Transmitter Connection (Optional)

In case of remote indication, the magnetic level gauge can also be fitted with  a 4-20 mA transmitter that converts the float position in electrical form for use with PLC/DCS/SCADA.

Alarms and Control (Optional)

The magnetic level switch may be provided in the chamber for providing the alarm signals and control of the process equipment such as pumps, valves etc. at the pre-set liquid levels.

Mounting Configurations

• Side Mounted Configurations: Outside-vessel installation that operates via hydrostatic principle using bi-color capsule or roller visual indicators.
• Transmitter Upgrades: Side-mounted variants available equipped with integrated 4-20 mA level transmitting transducers.
• Alarm Switch Controls: Side-mounted indicators available with high & low level latching or non-latching magnetic switches.

Dimensional & Measurement Range

• Center-to-Center (C/C) Distance: Standard structural spans scaling from 300 mm up to 4000 mm.

Pressure & Thermal Limits

• Design Pressure Rating: Engineered to safely withstand operating pressures up to 25 Kg/cm².
• Design Temperature Range: Rated for critical process conditions traversing from -20°C up to 400°C.

Material of Construction (MOC)

• Wetted Chamber Parts: Heavy-duty options including SS304, SS304L, SS316, and SS316L.
• Corrosive Chemical Protection: High-resistance internal PTFE lining option for aggressive acids and alkalies.

End Connections

• Piping Interface Standards: Fabricated to align with ASA flanged sizes, BS flanged sizes, DIN flanged sizes, or sanitary Tri-clover clamps.

Fluid Medium Limits

• Specific Gravity Threshold: Calibrated for non-hazardous or high-pressure process liquids with a minimum specific gravity of 0.7.
• Fluid Viscosity Limit: Capable of tracking media profiles up to 250 cP.

Measurement Method with Sealed Design: The Magnetic Level Gauge incorporates a sealed bypass channel which ensures separation between the process media and the indicator on the outside, allowing for its use in cases of hazardous or corrosive process fluids.

Automation of Processes Possible: An additional 4–20 mA transmitter is provided for remote level reading purposes, ensuring easy incorporation into PLC, DCS, or SCADA control systems.

Designed for Corrosive Environments: There are versions of the Magnetic Level Gauge with chambers made of PTFE that are designed for operation with acids and other highly corrosive media.

Wide Range of Installations Available: The gauge is supplied both in side mounting and in top-mounting versions.