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The 3DM-GX4-45™ is a miniature industrial-grade all-in-one navigation solution with integrated GPS and magnetometers, high noise immunity, and exceptional performance.

Product Highlights

  • High performance integrated GPS receiver and MEMS sensor technology provide direct and computed PVA outputs in a small package.
  • Triaxial accelerometer, gyroscope, magnetometer, temperature sensors, and a pressure altimeter achieve the best combination of measurement qualities.
  • Dual on-board processors run a sophisticated Extended Kalman Filter (EKF) for excellent position, velocity, and attitude estimates.
Datasheet Manual
Large Quantity & OEM Orders

Best in Class Performance

  • Fully calibrated, temperature compensated, and mathematically aligned to an orthogonal coordinate system for highly accurate outputs
  • Bias tracking, error estimation, threshold flags, and adaptive noise, magnetic, and gravitational field modeling allow for fine tuning to conditions in each application.
  • High performance, low drift gyros with noise density of 0.005°/sec/√Hz and VRE of 0.001°/s/g2RMS
  • Smallest and lightest industrial GPS/INS available

Ease of Use

  • User-defined sensor-to-vehicle frame transformation
  • Easy integration via comprehensive SDK
  • Common protocol with the 3DM-GX3® and 3DM-RQ1-45™ sensor families for easy migration

Cost Effective

  • Out-of-the box solution reduces development time.
  • Volume discounts


Integrated sensors

Triaxial accelerometer, triaxial gyroscope, triaxial magnetometer, temperature sensors, pressure altimeter and GPS receiver

Data outputs

Inertial Measurement Unit (IMU) outputs: acceleration, angular rate, magnetic field , ambient pressure, deltaTheta, deltaVelocity

Computed outputs

Extended Kalman Filter (EKF): filter status, GPS timestamp, LLH position, NED velocity, attitude estimates (in Euler angles, quaternion, orientation matrix), linear and compensated acceleration, bias compensated angular rate, pressure altitude, gyroscope and accelerometer bias, scale factors and uncertainties, gravity and magnetic models, and more. Complementary Filter (CF): attitude estimates (in Euler angles, quaternion, orientation matrix), stabilized north and gravity vectors, GPS correlation timestamp

Global Positioning System outputs (GPS): LLH position, ECEF position and velocity, NED velocity, UTC time, GPS time, SV. GPS protocol access mode available.

Inertial Measurement Unit (IMU) Sensor Outputs





Measurement range

±5 g (standard)

±16 g (option)

300°/sec (standard

±75, ±150, ±900 °/sec (options)

±2.5 Gauss


±0.03 % fs

±0.03 % fs

±0.4 % fs


<0.1 mg



Bias instability

±0.04 mg



Initial bias error

±0.002 g


±0.003 Gauss

Scale factor stability

±0.05 %

±0.05 %

±0.1 %

Noise density

100 µg/Hz




Alignment error




Adjustable bandwidth

225 Hz (max)

250 Hz (max)


Offset error over temperature

0.06% (typ)

0.05% (typ)


Gain error over temperature

0.05% (typ)

0.05% (typ)


Scale factor non-linearity (@ 25° C)

0.02% (typ)

0.06% (max)

0.02% (typ)

0.06% (max)

±0.0015 Gauss

Vibration induced noise





Vibration rectification error (VRE)





IMU filtering

4 stage filtering: analog bandwidth filter to digital sigma- delta wide band anti-aliasing filter to (user adjustable) digital averaging filter sampled at 4 kHz and scaled into physical units; coning and sculling integrals computed at 1 kHz

Sampling rate

4 kHz

4 kHz

50 Hz

IMU data output rate

1 Hz to 500 Hz

Pressure Altimeter


-1800 m to 10,000 m


< 0.1 m

Noise density

0.01 hPa RMS

Sampling rate

25 Hz

Computed Outputs

Position accuracy

±2.5 m RMS horizontal, ± 5 m RMS vertical (typ)

Velocity accuracy

±0.1 m/s RMS (typ)

Attitude accuracy

EKF outputs: ±0.25° RMS roll & pitch, ±0.8° RMS

heading (typ)

CF outputs: ±0.5° roll, pitch, and heading (static, typ), ±2.0° roll, pitch, and heading (dynamic, typ)

Attitude heading range

360° about all axes

Attitude resolution

< 0.01°

Attitude repeatability

0.3° (typ)

Calculation update rate

500 Hz

Computed data output rate

EKF outputs: 1 Hz to 500 Hz

CF outputs: 1 Hz to 1000 Hz

Global Positioning System (GPS) Outputs

Receiver type

50-channel u-Blox 6 engine GPS, L1 frequency, C/A


GPS data output rate

1 Hz to 4 Hz


Cold start: 27 sec, aided start: 4sec, hot start: 1 sec


Tracking: -159 dBm, cold start: -147 dBm, hot start: -156 dBm

Velocity accuracy

0.1 m/sec

Heading accuracy


Horizontal position accuracy

GPS: 2.5 m CEP SBAS: 2.0 m CEP

Time pulse signal accuracy

30 nsec RMS

< 60 nsec 99%

Acceleration limit

4 g

Altitude limit

No limit

Velocity limit

500 m/sec (972 knots)

Operating Parameters


USB 2.0 (full speed) RS232 (9,600 bps to 921,600 bps, default 115,200)

Power source

+ 3.2 to + 36 V dc

Power consumption

170 mA (typ), 200 mA (max) - Vpri = 3.2 to 5.5 V dc

750 mW (typ), 900 mW (max) - Vaux = 5.2 to 36 V


Operating temperature

-40 °C to +85 °C

Mechanical shock limit

500 g (calibration unaffected)

1000 g (bias may change)

5000 g (survivability)


180,000 hours (Telcordia method I, GL/35C)

67,000 hours (Telcordia method I, GM/35C)

Physical Specifications


44.2 mm x 24.0 mm x 11.3 mm (excluding mounting tabs), 36.6 mm (width across tabs)


20 grams

Enclosure material


Regulatory compliance




Data/power output: micro-DB9

GPS antenna: MMCX type


MIPMonitor, MIPHard and Soft Iron

Calibration, Windows XP/Vista/7/8 compatible


Protocol compatibility with 3DM-GX3® and 3DM- RQ1-45sensor families.

Software development kit (SDK)

MIPdata communications protocol with sample code available (OS and computing platform independent)


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