Winn-Marion Companies

Not your AVERAGE Representative Firm

Automation Service

Automation Service

  • Turnkey Automation
  • Network Design
  • Solar Packages
  • Calibrations
  • Pressure Control
  • Learn more about Automation Services at Winn-Marion

Controls Integration

Controls Integration

  • Emissions Monitoring
  • Analyzers
  • Speed & Load Control
  • Engine Control
  • Governor Upgrades
  • Learn More About Controls Integration Services at Winn-Marion

Sales, Assembly & Repair

Controls Integration

  • Heat Tracing
  • ESD Valves
  • Valve Assembly
  • Flow Meters
  • Recorders
  • Learn More About Products, Assembly, Repair at Winn-Marion

Magnetrol Products

Magnetrol Float Level Switch


Magnetrol's Float Level Switches are designed for top mounting into tanks or vessels. T20 & T21 models are available for any type of open or closed vessel, with either threaded or flanged type mounting, and actuating depths of up to 48-inches. The buoyancy forceMagnetrol Float Level Switch of process liquids on the float causes the float to move with the liquid surface. The movement of the float moves an attraction sleeve into the field of the switch magnet, pulling the magnet toward the sleeve and actuating the switch. These float level switches can be used in applications such as day tanks, fuel storage tanks, flash tanks, condensate receivers, cooling towers, interface, high and high/high alarm from single tank entry.


  • Available in float diameters of 3" x 5", 4" and 4-1/2" 
  • Tank connections available in 1" NPT, cast iron, forged, or stainless steel flanges
  • Maintenance free
  • Choice of switch mechanism: Dry contact, hermetically sealed, pneumatic
  • Choice of switch enclosure:
    • NEMA 1 carbon steel for pneumatics
    • TYPE 4X/7/9 Class I, Div. 1, Groups C & D, polymer coated aluminum
    • TYPE 4X/7/9 Class I, Div. 1, Group B, polymer coated aluminum

Product Specifications

Winn-Marion Locations

Contact Us at any of the Winn-Marion Locations:
Denver, CO - 303.778.6767
Salt Lake City, UT - 801.676.0155 | Phoenix, AZ - 480.968.9344 | Billings, MT - 406.259.9234 | Pittsburgh, PA - 412.319.7392
Roosevelt, UT - 435.725.0082 | Farmington, NM - 505.326.4069 | Evans, CO - 970.339.9211 | Gillette, WY - 307.686.9196 | Arnegard, ND - 701.586.3184