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AS-LLS Liquid Level Elements
SummaryFCI provides single point liquid level switches that
include a thermowell mounted sensing element and 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.
Please complete and submit the attached Application Data Sheet or
contact FCI’s Field Representative in your area to receive a
technical quotation for your Liquid Level and Interface Switch
application.
Applications
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Remote oil
level sensor (ROLS) |
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Fuel level
detection |
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Automation of
sight gauge level detection |
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Collection
sumps |
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Hydraulic and
coolant reservoirs |
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Oil/water
interface detection |
SpecificationsService: Liquid/gas level and
liquid/liquid interfaces.
Accuracy: ± 0.25 inches [6.35 mm]
Repeatability: ± 0.125 inches [3.17 mm] of liquid level
elevation.
Time Response: 1 second or greater depending on switch point
setting.
Reliability (MTBF): 60,000 to 150,000+ Hours.
Qualifications: MIL STD 810 and RTCA/DO-160.
Quality System Approvals: ISO9001 and AS9000.
Weight: 0.35 to 0.45 lbs. [ 0.16 to 0.20 kgs].
Level ElementMaterials of Construction:
Standard: 300 series stainless steel with nickel braze per AMS
4777; or all-welded construction; passivated finish per QQ-P-35.
Optional: Hastelloy C, titanium and other alloys.
Process Connection: Flanged or threaded.
Insertion Length: As required by customer.
Operating Temperature: -65° to +500° F [-54° to +260° C].
Proof Pressure: To 2000 psig [138 bar(g)].
Enclosure:
For environmentally-sealed units: Electroless nickel plated
aluminum with o-ring seal.
For hermetically sealed units: 300 series stainless steel.
Electrical Connection: Military, commercial connector or potted
flying lead.
Controller
Operating Temperature: -40° to +160° F [-40° to +71° C] Higher
temperature service optionally available.
Input Power: 28 Vdc nominal per MIL STD -704.
Power Consumption: 50 to 85 mA depending on type of output signals.
Output Signal:
u Op amp totem pole output: Wet Signal = Source 2 mA at 17 Vdc
minimum; Dry Signal = Sink
2 mA at 1 Vdc maximum.
u Open collector output: Wet Signal = closed, sinking up to 100 mA
at less than 1 Vdc; Dry Signal = Open, leakage< 10 µa at 28 Vdc.
Electrical Connection: Military connector or flying lead.
EMI/ Lightning Protection: MIL STD-462 and RTCA/DO-160
Optional Equipment: Temperature switch output and material
certificates.
Optional N.I.S.T. Test Lab Calibration Services
Factory N.I.S.T. calibration is available as an option for customer
specified setpoint(s). |
