Strapdown Heading Reference SHR-S360 (Gyro-Stabilized)

A gyro-stabilized heading reference includes a gyro on the yaw axis of the sensor package. This allows the reference sensor to provide accurate heading data, even while the platform is moving.


  • Solid State, Strapdown System
  • Small Size
  • Low Cost, Low Power
  • Rugged, High Reliability
  • Vibration Resistant
  • Analog and RS-232 Serial Outputs
  • PC Heading Calibration
  • One Year Limited Warranty
  • Engineering Support

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The SHR-S360 is the smallest version of our Strapdown Heading Reference line of sensors. This product uses MEMS gyros to make the SHR-S360 more economical and slightly smaller than the SHR-E360 heading reference that uses VSG gyros for enhanced accuracy and signal stability.

The SHR-S360 provides heading and sensor information. It includes a high accuracy triaxial fluxgate magnetometer, a triaxial accelerometer, and a rate gyro. This unit is a “strap-down” or “body-axis” sensor. The sensitive axes of the SHR will stay at a constant relationship with the vehicle and move as the vehicle moves. Since the fluxgate sensors rotate with the unit, it must use its angle sensors to calculate the rotation back to level. This function is similar to a mechanical gimbal except that the rotations are done using software. The SHR-S360 has several advantages over using a traditional gimbal including: no bearings to wear out, no fluid to leak and high shock survivability.

The SHR-S360 is gyro-stabilized. This means that the SHR will provide better performance in dynamic applications. The internal gyro allows the SHR to respond to short-term movements while the fluxgate provides the long-term heading reference. This combination of sensors allows for accurate data in a wider range of applications than a SHR without gyro-stabilization.

The Watson Industries “strap-down” solution provides a better magnetic heading than other magnetic heading products using mechanical gimbals. A significant problem with mechanically gimbaled compasses becomes apparent when trying to calibrate the heading sensor in the field. With a strap-down system, the magnetometers are fixed with respect to the vehicle in which it is mounted; Therefore, the constant soft and hard iron field distortions can be fully calibrated out.

The SHR-S360 provides superior performance in installations involving land vehicles.