SHRIDHAN Magnetic level indicators (MLIs) are advanced instruments used for continuous liquid level measurement in tanks and vessels. They consist of a chamber mounted on the side of the vessel, containing a magnetic float that rises and falls with the liquid level. As the float moves, it interacts with an external indicator, typically a series of magnetic flaps or a magnetic bar graph, which provides a clear and precise visual indication of the liquid level.
SHRIDHAN MLIs offer several advantages over traditional sight glasses. They are highly visible and can be read from a distance, even in low light or challenging environments. Because they are magnetically coupled, there is no direct contact between the indicator and the process fluid, ensuring a safer operation and reducing the risk of leaks or contamination.
Magnetic Level Indicators (MLIs)
SHRIDHAN MLIs provide reliable, maintenance-free level measurement, enhancing safety and efficiency in various industrial processes. This design also allows Shridhan MLIs to be used in applications involving hazardous, toxic, or corrosive liquids. Constructed from robust materials such as stainless steel or special alloys, SHRIDHAN MLIs are suitable for a wide range of temperatures and pressures, making them ideal for industries such as oil and gas, chemical processing, pharmaceuticals, and water treatment. They can also be equipped with additional features like alarms and transmitters for remote monitoring and integration into control systems.
Applications
- Total level and interface level measurement
- Boilers
- Power generation
- Petrochemicals
- Strong acids and alkalis
- High pressure and high temperature processes
- Flashing
Specifications
OPERATING PARAMETERS:
- Min. Liquid Sp.Gravity - 0.4 (Side mounted), 0.6 (Top mounted)
- Max. Operating Pressure - Up to 250 bar (Metallic) / Up to 5 bar
(PP / PVDF / PTFE)
- Max. Temperature - 70°C (PP) / 100°C (PVDF) / 400°C (Metallic)
CONSTRUCTION:
- Still Well (For Top Mounted only) - SS304 / SS316 / SS316L / PP / Alloys / PVDF / Others
- Float Material - SS316 / SS316L / Hastelloy / Inconel / Titanium / PP / PVDF / PTFE / Other non-ferritic materials
- Float Chamber - 2" and above in SS304 / 316 / 316L / Hastelloy / Inconel / Titanium / PP / PVDF / PTFE / other non-ferritic materials
LEVEL INDICATION DISPLAY:
- Bi-Color Magnetic Flappers - SS304 / SS316 up to 400°C
- Magnetic Shuttle - Aluminum up to 200°C
- Calibrated Scale
- Range (C-C Distance) - 300-5000mm (Magnetic Flappers Display), 300-3000mm (Magnetic Shuttle Display)
FEATURES:
- Vent and Drain Plug - Sizes from 1/2" and above
PROCESS CONNECTION:
- Side Mounting - 15NB and above
- Top Mounting - 15NB to 150NB (standard), higher sizes on request
- Flanges as per BS / ANSI / DIN or 1/2" / 3/4" / 1" BSP/ NPT (M/F) Threaded
INSTRUMENT CONNECTION:
- 1/2" NPT Female / 1/2" BSP Female / M20 x 1.5 / As per customer requirement
Accessories
- Reed Switches - SPDT and DPDT
- Micro Switches - SPDT and DPDT
- Reed Chain Transmitters or Magnetostrictive Level Transmitters
- Thermal Insulation for high temperature services
- Cryogenic Insulation - for cryogenic services
- Anti-frost Extensions - for cold temperature services and where visible extensions are required
- Tracing - Steam/Electrical - for viscous services
- Magnetic Particle Traps for eliminating magnetic particles from process
- Isolation Valves (for process connection) - for easy maintenance for instrument
Product Variations
MLI - MBLI Series / Duo Series
High-reliability magnetic level indicators for continuous monitoring using non-contact coupling. Includes high-visibility bar-graphs and dual-chamber designs with switch and transmitter integration. Ideal for high-pressure, high-temperature, and hazardous industrial applications.
MLI - Anti-Frost Extension
Specially designed extension for low-temperature or cryogenic services. Prevents frost formation on the indicator by isolating it from the cold process, ensuring clear visibility, accurate measurement, and reliable performance in extreme environments.
MLI - Insulated Version (Cryogenic)
Engineered for ultra-low temperature applications with thermal insulation from the cryogenic process. Minimizes heat transfer to prevent icing and condensation, ensuring safe and accurate level monitoring in cryogenic storage and handling systems.
MLI - Traced Version
Features integrated steam or electric tracing for applications requiring process temperature maintenance. Prevents solidification or crystallization of viscous fluids inside the chamber, providing reliable and continuous level indication.
MLI - High Pressure Version
Reinforced chamber construction engineered for extreme high-pressure industrial processes. Utilizes safe magnetic coupling for accurate, maintenance-free level monitoring in critical applications requiring high reliability under pressure.
MLI - SS Version
Premium stainless steel construction designed for enhanced corrosion resistance In aggressive or hygienic environments. Ensures long-term durability and accurate magnetic level indication in demanding chemical and industrial processing applications.
MLI - Insulated Version (Thermal Insulation)
Designed for temperature-sensitive fluids, featuring thermal insulation to minimize heat loss or gain. Ensures stable, accurate level measurement and reliable performance in extreme high or low-temperature industrial services.
MLI - Engineered Plastics Version
Corrosion-resistant non-metallic indicators utilizing advanced engineered plastics for aggressive chemical media. Ideal for chemical processing, water treatment, and specialty applications where metal construction is not suitable.