Product Description

The Magne-Trac product line provides one of the safest and most economical ways to meet your level measurement requirements. In applications for extreme pressure, temperature, vibration, and highly corrosive or hazardous material, Magne-Trac gauge will perform where other fail. Features include lower installation costs, easy to read liquid level indication, and low maintenance.

Constructed of non-magnetic materials including standard 316 SST. Exotic materials such as Alloy

20 & Hastelloy C are available. Traditional inlet & outlet mounted design displaying liquid level to match the vessel level. Complete with flange end closure for accessibility to float. Magne-Trac chambers are available to ASME 31.1 and 31.3.

Product Features

  • Innovative Flag Design Maximizes Magnetic Field
  • Wide Flags for Enhanced Indicator View
  • Impact Resistant Polycarbonate Indicator Window
  • Corrosion Resistant Moving Parts
  • Wide Variety of Materials
  • Available to ASME 31.1/31.3 Standards

Product Specifications

Magne-Trac Chamber

The chamber may be constructed of any non-magnetic material, including austenitic stainless steel, alloys such as Alloy 20, and plastics. The chamber is typically mounted to the side of the vessel with an inlet and outlet that will allow the liquid level in the chamber to match the liquid level in the vessel, in the same manner that traditional sight glasses work. Magne-Trac chambers are available to ASME 31.1 and 31.3., and utilize flange end closures for float access.

Magne-Trac Float

Standard floats are constructed of thin wall, deep drawn 316 Stainless Steel or Titanium. Optional materials are available. Each float is custom engineered for a specific application and operating process variables. The float houses a magnet array, designed to project a magnetic field through the chamber and to an externally mounted indicator assembly. Variables considered in the construction of a float are dependent on the temperature, pressure, and liquid density, as well as material compatibilities.

Magne-Trac Indicator

The standard indicator consists of anodized aluminum housing, rotating flags, and a clear cover. The standard UV stable Yellow/Black flags are uniquely constructed of high temperature molded nylon. The non-corrosive nature of the material eliminates problems with corrosion often encountered with aluminum flag/stainless steel pins most commonly supplied in the market. Magne-Trac indicators are constructed with a UV scratch resistant polycarbonate window as standard, eliminating nuisance breakage of glass and allowing a high integrity fit. The flags are a wide 1.4″ to enhance viewing. Each flag is assembled around a high temperature rare earth magnet assembly that ensures a latching action to eliminate false indication due to a vibration.

MLI Overview Specifications

Measuring Range 12 to 600in (over 50ft consult sales)
Temperature Range -320°F to +1000°F (-196°C / +538°C)
Pressure Range Full Vacuum to 2800 psig
Specific Gravity As low as 0.35 SG (consult sales for lower)

Materials of Construction

Chamber Materials  (Metal Alloys) 316 /316L or 304/ 304 Stainless Steel, Monel, Hastelloy C-276, Alloy 20, and other Non-Magnetic Alloys
Chamber Materials  (Plastics/Composites) PVC, CPVC, AND PVDF
Float Materials Per application – 316 SST & Titanium are standard (exotic alloys available)


Indicator Flags 1.4” Wide Flag Assembly in Yellow/Black (Additional Colors Available on Request)
Indicator Housing Anodized Aluminum, Stainless Steel
Scale Ft/Inches (Std.), Metric, Percentage, Volume, etc. *Custom Scales Available
Visual Indication Easily visible from 200 ft.


Float / Standpipe Material Minimum Temperature °F (°C) Maximum Temperature °F (°C)
Metallic -325°F [-198°C] 750°F [400°C]
PVC -20°F [-28°C] 140°F [60°C]
CPVC -20°F [-28°C] 200°F [93°C]

Process Connections

Pressure Class Ratings ANSI 150#; 300#; 600#; 900#; 1500#; 2500#
Process Connection Sizes ½” to 10+ [DN20 TO DN150]
Process Connection Types MNPT, FNPT, Weldolet®, Sockolet®, Socketweld Flange, Weldneck Flange, Lap Joint Flange; RTJ Flanged, Plain Pipe Stub

Float Minimum Specific Gravity

Float Material Minimum Specific Gravity
316/316L SS 0.49 SG
Titanium 0.37 SG
Monel® 0.51 SG
Alloy-20b3 0.47 SG
Hastelloy® C276 0.53 SG
PVC 0.79 SG
CPVC 0.86 SG
Other Consult Sales

Level Transmitter & Alarm Options

Transmitter Options MTLT-5000 Magnetostrictive

Guided Wave Radar (contact sales)

Switch Options MTLS-1A; MTLS-5A; MTLS-10A; MTLS-PNEU

Temperature Options

High Temperatures Insulation Blankets, Electric or Steam Tracing, High Temperature Indicators, etc.
Low Temperatures Insulation Blankets, Cryogenic Insulation, Non-Frost Extensions, Electric or Steam Tracing, etc.

Compatible Products


Document Title Category
400-00 Magne-Trac Brochure
Product Line Brochure
410-01 Magne-Trac Model Code Guide
Data Sheet, Magne-Trac
410-05 Magne-Trac Configuration Guide
Data Sheet, Magne-Trac, RFQ
430-00 Magne-Trac IOM
IOMs, Magne-Trac
430-02 Multiple Float Installation IOM
IOMs, Magne-Trac
420-01 Anatomy of a Mag Gauge
Magne-Trac, Technical Documents
400-10 Flashing Solutions
Magne-Trac, Product Literature
MLI Data Sheet for MLI
Data Sheet, Magne-Trac, RFQ
400-04 Magne-Trac Catalog
Brochures, Product Line Brochure
400-12 MagneTrac Optional Equipment
Magne-Trac, Product Literature
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