iIMU-FSAS-NG: Low Power IMU of class 0.75 deg/hr / 1.5 mg

iIMU-FSAS-NG: Class 1 deg/hr IMS (Gyro + Accel + Odometer)

Tactical Grade IMU with Integrated Power Regulation [low power]

The iIMU-FSAS-NG is a very small size IMU con­sisting of 3 fiber optical gyros (FOG) in closed-loop technology of class 0.75 deg/hr and 3 servo-accelerometers of class 1 mg. It is the form-fit-function successor of the well-known iMU-FSAS, but consumes about 4 W less power, comes with optionally slightly lower enclosure height and proides fully compatible mechanical and data interfaces.

For users of NovAtel's SPAN technology, the version iIMU-FSAS-NG-EI-SN is provided. It is directly supporting the SPAN interface, a cable to connect it with NovAtel's ProPak (TM) can be provided on request.   


  • < 0.75 deg/hr, 0.15 deg/rt-hr / 450 deg/s , 1.5 mg / 5g or 20 g ; 500 Hz
  • bias stability (Allan Variance): < 0.1 deg/hr
  • two enclosure sizes available (one compatible to previous iIMU-FSAS and one smaller/lighter version)
  • higher MTBF than RLG sys­tems
  • interfaces: RS422 UART, RS422 HDLC, Odometer [depends on options]
  • operational modes: free running or external triggered
  • Applications:
    • Stabilisation tasks
    • INS/GPS navigation
    • Surveying applications
    • Guidance and Control
  • used in many countries / applica­tions worldwide
  • compatible to NovAtel's SPAN interface (only valid for special version -SN)

The IMU is designed for accurate surveying and navigation applications and therefore contains no integrated vibration absorbers. The iIMU-FSAS can be oper­ated on a unregulated wide range input supply voltage and is protected against wrong polarity and moder­ate over-volt­age. The data output can be trig­gered and the data are sent via RS422 on an HDLC protocol or via RS232 / RS422 UART. All sig­nals are fed via an robust con­nector of type MIL-C-38999-III.

The iIMU-FSAS-NG is manu­fac­tured in Ger­many and can be used in many commercial and defense applica­tions as a replace­ment for Litton’s LN-200 or Hon­eywell’s HG1700/1900 in surveying applications. Com­pared to HG1700 the iIMU-FSAS-NG has more than 10 times higher MTBF.

If the application requires a full INS/GNSS/ODO data fusion, see our iNAT-FSSG System Family.

Further information:

Datasheet iIMU-FSAS-NG

Datasheet iIMU-FSAS-NG-EI-SN with interface to support NovAtel's SPAN application


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