MLM Magnetic Level Gauge：Mechanical Fuel Level Measurement for Tanks and Vessels
When You Need Level Indication That Never Lies
Float-based gauges stick. Sight glasses fog. Electronic sensors drift.
The MLM uses buoyancy and magnetic coupling – a principle that doesn't need power, doesn't need calibration, and doesn't fail.
The float rises and falls with the liquid. A permanent magnet inside the float couples with the indicator column outside. Red and white flags flip 180 degrees as the level changes. Red means liquid. White means empty. You see the level at a glance – from meters away.
Built for the Real World
| Your Challenge | MLM Answer |
|---|---|
| Wide level range | 300 ~ 15,000 mm – covers small tanks to large vessels |
| High pressure | 0 ~ 9.6 MPa – handles pressurized fuel and oil systems |
| High temperature | -20 ~ 150°C standard; high-temp version up to 350°C |
| Density variation | 0.5 ~ 2.0 g/cm³ – works with light fuels and heavy liquids |
| Corrosive fluids | SS304, SS316L, UPVC, UPP, PTFE – choose your material |
| Multiple mounting options | Side, top, or bottom mounted – fits your tank design |
| Alarm requirements | Upper alarm, lower alarm, or both – optional |
| Remote monitoring | 4~20mA two-wire output – connects to PLC, DCS, or display |
| Hazardous areas | Simple, passive operation – no ignition risk |
How It Works – Simply
-
Float follows the liquid – a magnetic float rises and falls with the level
-
Magnetic coupling – the magnet inside the float couples through the wall to the indicator
-
Flags flip – red/white flags rotate 180° as the level changes
-
Remote signal – optional reed sensor chain converts level to 4~20mA for remote display
No power needed for local indication. No calibration. No drift.
Key Specifications
| Parameter | Value |
|---|---|
| Product Name | Magnetic Level Gauge |
| Model | MLM |
| Test Range | 300 ~ 15,000 mm |
| Working Temperature | -20 ~ 150°C (standard) / -10 ~ 350°C (high temp) |
| Working Pressure | 0 ~ 9.6 MPa |
| Density Range | 0.5 ~ 2.0 g/cm³ |
| Material Options | SS304, SS316L, UPVC, UPP, PTFE |
| Installation | Side mounted, Top mounted, Bottom mounted |
| Alarm Options | Upper alarm, Lower alarm, Upper + Lower alarm |
| Display | Mechanical (red/white flags) |
| Accuracy | ±5 mm |
| Remote Output | 4~20mA two-wire (optional) |
What Sets MLM Apart
| Feature | What It Means for You |
|---|---|
| No power for local display | Works during power outages – level always visible |
| Magnetic coupling | No mechanical linkage through the wall – no seal to leak |
| Red/white flag display | Visible from a distance – no squinting at gauges |
| Wide pressure range | 0~9.6 MPa – handles pressurized fuel and oil systems |
| Wide temperature range | Up to 350°C – works with hot oils and process fluids |
| Multiple materials | SS304, SS316L, UPVC, UPP, PTFE – match your fluid |
| Flexible mounting | Side, top, or bottom – fits your tank geometry |
| Optional alarms | Upper and/or lower alarm – safety and automation |
| 4~20mA output | Remote monitoring – connects to any control system |
| ±5mm accuracy | Reliable indication – no more guessing |
Typical Applications
| Industry | Application | Why MLM |
|---|---|---|
| Oil and Fuel Storage | Diesel, gasoline, fuel oil tank level | Mechanical reliability, high pressure |
| Chemical Processing | Acid, solvent, chemical tank level | Corrosion-resistant materials available |
| Petrochemical | LPG, crude oil, refined product tanks | High pressure, wide temperature |
| Pharmaceutical | Solvent, reagent, API storage tanks | Hygienic materials, accurate |
| Food and Beverage | Edible oil, syrup, liquid ingredient tanks | SS316L, cleanable |
| Water Treatment | Chemical dosing tanks, storage vessels | Corrosion-resistant, reliable |
| Power Generation | Fuel oil, lubricant, cooling water tanks | High temperature, high pressure |
One Question
Would you rather trust a sensor that needs power, calibration, and maintenance – or a float that just works?
Sensors drift. Power fails. Calibration expires.
A float coupled to a magnetic indicator just keeps working.
The MLM gives you the reliability you need.
Ready to specify the MLM for your tank?
Contact us with your tank dimensions, fluid type, pressure, temperature, and mounting requirements. We'll recommend the right configuration and provide a quote within 24 hours.
