Fluid Components International Liquid Level Switch, Model AS-LLS
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Model AS-LLS Liquid Level Switch

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

FCI provides single point liquid level switches that utilize a no moving parts thermowell mounted sensing element with either integral or remote electronics that provide indication of presence or absence of liquid or interface at the sensing location. 

The liquid level element is directly installed into tanks, reservoirs, sumps and gearboxes on commercial and military aircraft, spacecraft, vehicles and marine applications.
Features
  • No moving parts
  • No routine maintenance
  • Wet/dry or wet/wet detection
  • Simple installation
  • Extreme temperature, pressure and vibration service
  • Corrosion, abrasion and fouling resistant
  • Small, compact and lightweight
  • Analog design eliminates DO178B and DO254 validation
  • On aircraft external switch point adjustment (by FCI Service Personnel)

Specifications

Brand

Adjustment Type

  • Factory Set (Pre-Set)

Applications

  • Aerospace & Military Applications
  • Automation of Sight Gauge Level Detection
  • Backflow Reservoir Detection
  • Collection Sumps
  • Coolant Reservoirs
  • Fuel Level Detection
  • Oil/Water Interface Detection
  • Oil Level Sensor
  • Potable Water Reservoirs
  • Waste or Grey Water Reservoirs

Approvals & Certifications

  • AS 9100
  • EMI & Lightning Protection: MIL-STD-461 & RTCA/DO-160
  • ISO 9001
  • Qualifications: MIL-STD-810 & RTCA/DO-160

Consumption

  • Power Consumption: 50 to 85 mA Depending on Typical of Output Signal

Electrical Connectors

  • D38999 Connector or Compatible

Enclosure, Body Material

  • 316 Stainless Steel

Input

  • Electrical Power Input: 28 Vdc Nominal Per MIL-STD-704

Media

  • Liquids & Gases

Operating Temperature

  • Electronics: -40° to 125° C (-40° to 257° F)
  • Sensor Element: -54° to 260° C (-65° to 500° F)

Output

  • Open Collector (Dry Signal): Open, Leakage < 10 µA at 30 Vdc
  • Open Collector (Wet Signal): Closed, Sinking up to 100 mA at < 0.5 Vdc
  • Sourcing Output: Wet Signal (Source): 240 mA at 28 Vdc, Dry Signal (Source): 0 Vdc

Proof Pressure

  • psig: 0 to 2,000 (kPa: 0 to 13,790, bar: 0 to 138)

Repeatability

  • ± 1/8” (± 3 mm) of Liquid Level Elevation

Response Time

  • Depending on Fluid Typical & Switch Point: 1 to 3 seconds Typical

Wetted Materials

  • 316 Stainless Steel

  • Oil Level Sensor
  • Automation of Sight Gauge Level Detection
  • Hydraulic Reservoirs
  • Fuel Level Detection
  • Potable Water Reservoirs
  • Collection Sumps
  • Waste or Grey Water Reservoirs
  • Coolant Reservoirs
  • Oil / Water Interface Detection
  • Backflow Reservoir Detection

Documentation

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