Tactical-grade embeddable IMU and attitude reference system with quad-redundant IMU architecture, next-generation vibration rejection, and no magnetic dependencies — designed for UAVs, legged robotics, and industrial platforms.
3DM-CX7-AR
The 3DM-CX7-AR is a tactical-grade embeddable attitude reference system (VRU) from MicroStrain by HBK. It delivers high-accuracy roll and pitch estimation without magnetic heading dependency, making it ideal for platforms operating in magnetically noisy or electrically challenging environments such as industrial machinery, legged robots, and motor-heavy UAV frames.
At its core, the CX7-AR features a quad-redundant IMU architecture. With four internal IMUs continuously monitored in parallel, the system automatically detects untrustworthy measurements from any individual IMU and deweights or excludes its readings in real time — providing a level of measurement integrity not available in single-IMU designs. Combined with next-generation shock and vibration robustness validated at up to 100x better attitude stability under repeated high-g conditions, the CX7-AR maintains reliable orientation where conventional IMUs degrade or fail.
Every unit is individually calibrated across the full -40°C to 85°C operating range and features MicroStrain's auto-adaptive Extended Kalman Filter for real-time error rejection.
Key specifications include an extended ±32 g accelerometer range, ±4,000°/s gyroscope range, adjustable output rates up to 1 kHz, and a compact 8.3 g OEM form factor measuring 38 mm x 24 mm. The 3DM-CX7-AR is NDAA compliant, ITAR free, ROS ready, and PX4 compatible. It is part of the MicroStrain C-Series inertial sensor family, backed by 80+ years of HBK measurement heritage.
Certificates and Approvals
| 3DM-CV7 Declaration of Conformity (UK) | Declaration of Conformity | English |
| 3DM-CV7 Declaration of Conformity (EU) | Declaration of Conformity | English |
| Type | Inertial (IMU) |
| Performance Grade | Tactical Grade |
| Features | Accelerometer, Barometer, Gyroscope |
| Random Walk | Accel: 36 µg/√Hz, Gyro: 0.058º/√h |
| Bias Instability (Gyroscope) | 2.1 °/hr |
| Bias Instability (Accelerometer) | 8.5 μg |
| Communication Port Type | Samtec FTS-105 (2x5) |
| Communication Interface | TTL serial |
| Update Rate | 1 to 1000 Hz |
| Inputs/Outputs | 4xGPIO |
| Weight | 8.3 g |
| Weight | 0.29 oz |
| Size | 38 x 24 x 8.6 |
| Size | 1.5 x 0.94 x 0.34 |
| Power Consumption | 0.324 W |
| Input Voltage | 3.2 to 5.2 VDC |
| Minimum Operating Temperature | -40 °C |
| Maximum Operating Temperature | 85 °C |
| Minimum Operating Temperature | -40 °F |
| Maximum Operating Temperature | 185 °F |
| MTBF | 1953356 h |
| Sensing Range (Accelerometer) | 32 g |
| Sensing Range (Gyroscope) | 4000 °/s |
| Sensing Range (Magnetometer) | 8 Gauss |
| Sensing Range (Pressure) | 1260 mbar |
| Ingress Protection Rating | Not Rated |
| Housing Material | Aluminum |
| Software | InertialConnect, MSCL, ROS, SensorConnect |
| Mounting Style | Embeddable, Precision Alignment, Screw Down |
| Badge | NEW |
| Product Code | Description |
|---|---|
6212-3006
|
OEM CABLE KIT |
6212-3009
|
C-Series Development Kit, USB |
6212-3010
|
C-Series Development Kit, RS232 |