iIMU-FSAS: Class 1 deg/hr Inertial Measurement System [not for new designs]
iIMU-FSAS-NG: Low Power IMU of class 0.75 deg/hr / 1.5 mg

iIMU-FSAS: Class 1 deg/hr Inertial Measurement System [not for new designs]

Tactical Grade IMU with Trigger and Integrated Power Regulation




The iIMU-FSAS 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.

For users of NovAtel's SPAN technology, the version iIMU-FSAS-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 ; 400 Hz
  • Bias stability (Allan Variance): < 0.1 deg/hr
  • higher MTBF than RLG sys­tems
  • Interfaces: RS232, RS422 UART, RS422 HDLC, Odometer [depends on options]
  • Applications:
    • Stabilisation tasks
    • INS/GPS navigation
    • Surveying applications
    • Guidance and Control
  • used in many countries / applica­tions worldwide

The IMU is designed for surveying applications as well as for rugge­dized ap­plications. The IMU does not contain internal vibration isolators to guarantee a best and stable alignment to the user's application. If operated in extensive vibration environment, the user can mount the iIMU-FSAS on external vibration absorbers if desired. 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.

If a full INS/GNSS/ODO navigation capability or AHRS functionallity is required, see our product line iNAT-FSSG.

The iIMU-FSAS 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 has more than 10 times higher MTBF.

Further information:

Datasheet iIMU-FSAS

Datasheet iIMU-FSAS-ADS

For new designs, we recommend to use our iIMU-FSAS-NG, which has about 4 W less power consumption and where the enclosure has slightly smaller height (but regarding mounting flange and data interface it is fully form-fit-function compatible):

Datasheet iIMU-FSAS-NG


Copyright © 1993 - 2020 iMAR Navigation GmbH. All Rights Reserved.

We use cookies on our website. Some of them are essential for the operation of the site, while others help us to improve this site and the user experience (tracking cookies). You can decide for yourself whether you want to allow cookies or not. Please note that if you reject them, you may not be able to use all the functionalities of the site.