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FCI pressure elements use piezoresistive sensors (strain gage sensors) fabricated using silicon processing techniques common in the semiconductor industry. 

Piezoresistive sensors are often referred to as IC sensors (integrated circuit), solid state sensors, monolithic sensors (formed from single crystal silicon) or just silicon sensors.

FCI elements consist of four strain sensitive resistors ion implanted into silicon wafers. These resistors are connected in a wheatstone bridge configuration. Two resistors increase in ohmic value as pressure increases while the other two decrease. When pressure is applied, the resistors in the arms of the bridge change by an amount R. Alignment of the resistors on the silicon determines which resistors increase and which decrease with pressure.
Features
  • No moving parts
  • High reliability
  • Wide range
  • Simple installation
  • Durable sensor solution
  • Military standard connections
  • Light weight, compact design
  • Exceptional corrosion and abrasion resistance
  • Multiple Switch points, up to 3
  • Linear voltage output
  • Available temperature option

Specifications

Accuracy

  • Interchangeability: ± 1 % of Reading

Applications

  • Aerospace & Military Applications
  • Coolant Systems
  • Environmental Control Systems (ECS)
  • Fuel Systems
  • Hydraulic Applications
  • Lubrication Equipment
  • Semiconductor Industry

Approvals & Certifications

  • AS 9000
  • Dissimilar Metal: MIL-STD-889
  • EMI: MIL-STD-461/462
  • Environmental Testing: MIL-STD-810
  • ISO 9001
  • Markings: MIL-STD-130

Burst Pressure

  • psi: 0 to 2,400 (kPa: 0 to 16,550, bar: 0 to 165.5)

Electrical Connectors

  • Military or Commercial Connector
  • Pigtail with Cable

Humidity

  • 100 % Relative Humidity

Input

  • < 10 mA
  • 28 Vdc

Materials of Construction

  • All-Welded, 300 Series Stainless Steel
  • Aluminum
  • Titanium

Media

  • Liquids & Gases

Operating Temperature

  • -40° to 125° C (-40° to 257° F)

Output

  • Close-Sink: 100 µA to 800 mA
  • Open-Leakage: < 10 µA

Proof Pressure

  • psig: 0 to 1,200 (kPa: 0 to 8,274, bar: 82.74)

Repeatability

  • ± 0.1 % of Reading

Resistance

  • Bonding: < 2.5 milliohms

Sensor, Probe Material

  • Silicon

Sensor, Probe Type

  • Piezoresistive Sensors (Strain Gage Sensors)

Set Point - Decreasing

  • bar: 0 to 34.47
  • kPa: 0 to 3,447
  • psi: 0 to 500

Set Point - Increasing

  • bar: 0 to 34.47
  • kPa: 0 to 3,447
  • psi: 0 to 500

Shock

  • Thermal Shock: 10° cycles/min

Switch Points

  • Three Switch Points

System Pressure

  • bar: 0.689 to 165.5
  • kPa: 68.95 to 16,547
  • psi: 10 to 2,400

Temperature Range

  • Survival Temperature: -80° to 200° C (-112° to 392° F)

Time Constant

  • 0.5 second

Vibration

  • Fixed Wing
  • Rotary

Voltage

  • D.R. Test Voltage: < 500 Vdc
  • I.R. Test Voltage: < 1,000 Vdc

  • Fuel syatems
  • Hydraulics applications
  • Environmental control system (ECS)
  • Coolant Systems
  • Aerospace & military applications
  • Lubrication equipment
  • Semiconductor industry
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