Fluid Components International Multipoint Liquid Level Switch, Model AS-MLLS
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Model AS-MLLS Multipoint Liquid Level Switch

Brand: Fluid Components International LLC (FCI)
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The Fluid Components AS-MMLS is a liquid level element with solid state multipoint electronics. 

FCI provides multipoint liquid level and interface switches that include a “strip sensor” or a thermowell mounted sensing element with integral or remote electronics that provide indication of presence or absence of liquid or interface at the multiple sensor locations along the length of the element.

The multipoint liquid level element is directly installed into tanks, reservoirs, sumps and gearboxes on commercial and military aircraft, spacecraft, vehicles and marine applications. Optional temperature output and controller function is available.
Features
  • No moving parts
  • High reliability
  • Light weight
  • Rugged construction
  • Multi-point level sensing
  • Process temperature output
  • Simple installation
  • Durable sensor solution
  • Optional control circuit
  • Real time temperature compensation
  • Maintenance free
  • Multiple output signal

Specifications

Brand

Accuracy

  • Liquid Level: ± 0.25” of Sensing Point
  • Temperature: ± 1 % of Full Scale

Applications

  • Aerospace & Military Applications
  • Fuel Tanks
  • Hydraulic Fluid Reservoirs
  • Lubricant Fluid Supply Tanks
  • Potable Water Vessels
  • Refrigerant Height Sensors

Approvals & Certifications

  • AS 9000
  • Calibration
  • ISO 9001
  • Material Certificate
  • MIL-STD-810
  • RTCA/DO-160

Electrical Connectors

  • Liquid Level Element: Connector on Flying Lead or Element-Mounted Connector
  • Pigtail Cable Flying Leads

Enclosure, Body Material

  • Control Unit Enclosure: Aluminum Alloy Painted Lusterless Black Per MIL-C-83286

Input

  • 28 Vdc Nominal Per MIL-STD-704
  • 7.5 W, Max.

Materials of Construction

  • Element (Mounting Fitting): 316 Stainless Steel with Braze or All-Welded
  • Element: Kapton Polyimide Platinum RTD Elements
  • Element: PVC Stilling Well Structure

Mounting

  • Flange Mount

Operating Temperature

  • 316 Stainless Steel Design: -54° to 343° C (-65° to 650° F)
  • Control Unit: -40° to 55° C (-40° to 131° F)
  • PVC / Kapton Polyimide Design: -54° to 70° C (-65° to 158° F)

Output

  • Signal Output (Discrete Ground/Open Switched Array): 4-20 mA

Process Connection Style

  • Threaded Fitting Per MS33514-16 Style 3 (1.312-12 UNJ-3A)

Proof Pressure

  • psig: 0 to 2,000 (kPa: 0 to 13,790, bar: 0 to 138) for 316 Stainless Steel
  • psig: 0 to 300 (kPa: 0 to 2,080, bar: 0 to 20.7) for PVC Stilling Well & Kapton Polyimide RTD Design

Repeatability

  • Level/Temperature: ± 1 % of Full Scale

Response Time

  • Dry to Wet: 5 seconds
  • Wet to Dry: 60 seconds

Sensing Range

  • Sensing Level Depth: Max.

Sensor, Probe Style

  • Insertion

Sensor, Probe Type

  • Platinum RTD

Wetted Materials

  • Stainless Steel

Documentation

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