The ISM3D is an advanced high-accuracy AHRS for underwater vehicles and platforms, combining MEMS-based accelerometers, gyroscopes and magnetometers with a powerful sensor fusion processing system. The unit delivers robust heading data with accuracy to ±1° of local magnetic north, and pitch and roll data to ±0.07° accuracy.
In environments with large amounts of ferrous metals or other magnetic disturbances, the magnetometers can be deactivated, and heading accuracy can be boosted thanks to a built-in soft and hard iron calibration feature. With advanced low-drift MEMS gyroscopes, the system can provide high-accuracy navigation that previously could only be achieved by fiber optic or ring laser diode based sensors.
The underwater AHRS can be provided in an acetal housing depth-rated to 1000 meters, a rugged 6000 meter-rated titanium housing, or as an OEM system.
| Dimensions (D x L): | 47 x 100.5 mm |
| Weight (Air/Fresh Water): |
0.33/0.225 kg titanium 0.2/0.1 kg acetal |
| Power: | 45 mA @ 24VDC |
| Depth Rating: |
6000m titanium 1000m acetal |
| Attitude: |
Pitch ±90o Roll ±180o Accuracy ±0.07o Resolution 0.01o |
| Heading: |
Accuracy ±1o of local magnetic north Resolution 0.1o |
