Strapdown Heading Reference SHR-E360 (Gyro-Stabilized)

The SHR-E360 is the second in our line of gyro stabilized heading reference sensors. It uses gyros with lower bias and noise specifications for higher accuracy while in motion.


  • Solid State, Strapdown System
  • Low Cost, Low Power
  • Rugged, High Reliability
  • Vibration Resistant
  • Analog and RS-232 Serial Outputs
  • PC Heading Calibration
  • Two Year Limited Warranty
  • Engineering Support
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SKU: SHR-E360 Categories: ,


The SHR-E360 provides heading and sensor information. It includes a high accuracy triaxial fluxgate magnetometer, a triaxial accelerometer, and an angular rate gyro. This unit is a “strapdown” 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-E360 has several advantages over using a traditional gimbal including: no bearings to wear out, no fluid to leak and high shock survivability.

The SHR-E360 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 components allows for accurate data in a wider range of applications than a heading sensor without gyro stabilization. The Watson Industries strapdown gyro 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 strapdown 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.

Strapdown systems provide superior performance in installations including vehicles, ships, buoys, aircraft, UAVs, ROVs, and submersibles.



Download Spec Sheet (PDF - 126.2 KB)


Download Manual (PDF - 111.9 KB)





Range: Bank ±180°
Range: Elevation ±90°
Resolution: 0.02° Binary mode (14 bit)
Analog Scale Factor: 18°/V ±10V Bank
±5V Elevation
Accuracy: Static ±0.3°

Magnetic Heading

Range: 0° – 360°
Resolution: 0.02° Binary mode (14 bit)
Analog Scale Factor: 18°/V ±10V Output
Accuracy: Static ±1.5°
* Accuracy: Dynamic 0.5%

Angular Rate

Range: Yaw ±100°/sec
Resolution: 0.025°/sec Binary mode (14 bit)
Scale Factor Accuracy: 0.005
Bias: Yaw < 0.2°/sec (Analog) ±0.02°/sec Binary mode (14 bit)
Non-Linearity: < 0.1% Full scale range
Bandwidth: 20 Hz
Noise: < 0.03°/sec rms


Range: X, Y, Z ±10g
Resolution: 4mg
Scale Factor Accuracy: 1%
Bias: X, Y, Z < 10mg
Non-Linearity: 0.1% Full scale range
Bandwidth: 3 Hz


Range: X, Y, Z ±1000 mGauss
Resolution: 0.1 mGauss Binary mode (14 bit)
Scale Factor Accuracy: 1%
Bias: X, Y, Z < 5 mGauss
Non-Linearity: < 0.01% Full scale range
Bandwidth: 10 Hz


Temperature: Operating -40°C to +85°C
Temperature: Storage -55°C to +85°C
Vibration: Operating 5g rms 20 Hz to 2 KHz
Vibration: Survival 10g rms 20 Hz to 2 KHz
Shock: Survival 500g 10mS ½ sine wave


Frame Rate: 284.44 Hz Maximum
Startup Time: Data 5 sec
Startup Time: Fully operational 10 sec
Input Power: 10 to 35VDC < 4W
Input Current: 260mA @ 12VDC 150mA @ 24VDC
Digital Output: RS-232
Analog Output: ±10VDC
Analog Output Impedance: 300 Ohm Per line


Axis Alignment: < 0.25°
Size: Including Mounting Flanges 3.24″W x 5.78″L x 2.67″H 8.2 x 14.7 x 6.8 (cm)
Weight: 27 oz (1.7 lb) 765 grams (0.8 Kg)
Connection: RS-232 9 pin female “D” subminiature
Connection: Power / Analog Outputs 9 pin male “D” subminiature
* Actual accuracy can be calculated as the listed percentage multiplied by the change in value over the entire dynamic maneuver.
Static heading accuracy is dependent on the magnetic environment.
This sensor will meet or exceed this spec within the 48 contiguous United States.
Specifications are subject to change without notice.
This product may be subject to export restrictions. Export Classification ECCN 7A994.

Additional information

Weight 0.6 kg
Dimensions 14.7 x 8.2 x 6.8 cm


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