CG-5100 IMU

Designed and Built for Long Term, High Performance
Forged from a combination of proprietary technologies, the commercial CG-5100 Inertial Measurement Unit (IMU) answers the need for reliable solutions to critical sensing applications in a range of environments. Highly accurate KVH fiber optic gyros (FOGs) coupled with MEMS accelerometers come together in a single system to provide long term relevance amid rapidly changing technological advances.

Versatile Uses and Easy Integration
The CG-5100 IMU, a strap-down inertial subsystem with low drift and solid state characteristics, offers accurate 6-degree angular rate and acceleration data and is suited for GPS-integrated navigation programs. A fully digital RS-232/RS-422 format makes for convenient adaptation. Ideal uses for this system include antenna, optical, and camera stabilization, GPS augmentation, autonomous vehicle guidance, drilling, navigation, and motion sensing.

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Performance Fiber Optic Gyro

Fiber Optic Gyros


Input Rate (maximum)
Bias Instability (25°C)
≤1°/hr, 1σ
Bias vs. Temp (≤ 1 °C/min)
≤6°/hr, 1σ
Scale Factor Non-Linearity (max rate, 25°C)
≤1000 ppm, 1σ
Scale Factor vs. Temp. (≤ 1 °C/min)
≤500 ppm, 1σ
Angle Random Walk (25°C)
Bandwidth (-3dB)
≥100 Hz
Technology - Accelerometers
MEMS Silicon
Input Limit (maximum)
±10 g
Bias Instability (constant temp)

<0.25 mg, 1σ

Scale Factor Temperature Sensitivity
250 ppm/°C, 1σ (max),
≤100 ppm/°C, 1σ (typical)
Velocity Random Walk (25°C)

≤0.12 mg/√Hz
(0.23 ft/sec/√hr)

Bandwidth (-3dB)*
≥50 Hz
Initialization Time (valid data)

≤5 secs

Data Interface
Asynchronous RS-422 or RS-232
Baud Rate
115.2 Kbps
Data Rate

100 Hz

Dimensions (max)

169.4 mm L x 152.4 mm W x 88.9 mm H
(6.67" x 6" x 3.5")

Weight, max

2.27 kg (5 lbs.)

Power Consumption, max (typical)

12 W (max)

Input Voltage
+9 to +18 VDC
Temperature: Operating

-40°C to +65°C
(-40°F to +149°F)

Shock: Operating

7 g, 11 msec, half-sine

Vibration: Operating

6 g rms, 20-2000 Hz random

Additional Specs
Additional Specs
Bias Offset (25°C) (Fiber Optic Gyros)
Bias Magnetic Sensitivity (Fiber Optic Gyros)
Misalignment (Fiber Optic Gyros)
±8 mrads
Bias Offset (constant temp) (Accelerometers)
±5 mg
Axis Misalignment (Accelerometers)
±10 mrads
≥10,500 Hrs

*Based on Accelerometer manufacturer specifications, verified during test

Brochures & Datasheets

Document File Info
DATASHEET - CG-5100 PDF file 1.1 MB / 2 pg



Strong magnetic fields have the ability to cause apparent drift in the gyro bias. This is due to the Faraday effect on the laser light in the sensing coil resulting in non-reciprocal light paths. While this effect can be observed in gyros designed for precision inertial navigation systems (drift rates of less than 1 degree per hour), and can be mitigated by the use of mu-metal shielding, there have been no reported problems with KVH FOGs. If your application results in mounting a FOG near a very strong magnetic field (>50 gauss), a practical test to determine sensitivity is suggested.


How to choose the right FOG... CG-5100  
  • Compact, 6-degrees of freedom inertial measurement unit designed using KVH’s patented DSP fiber optic gyro technology
  • Measures roll, pitch, and yaw angular rates and accelerations
  • Fiber optic gyro stability
  • Excellent shock and vibration performance
  • Long life and flexible interfacing
  • Affordable, compact design
  • Designed to meet Commercial off-the-shelf (COTS) requirements 
  •  Ideal for applications including antenna, optical, and camera stabilization, GPS augmentation, autonomous vehicle guidance, drilling, navigation, and motion sensing

This product is covered by one or more patents.

Featured Option

  • For applications that require GPS in addition to inertial measurement, check out KVH’s CNS-5000, a single-enclosure GPS/IMU Continuous Navigation Solution.

Exclusive Technology

  • DSP Technology
    KVH's Digital Signal Processing (DSP) electronics improve fiber optic gyro performance in such critical areas as scale factor and bias versus temperature, scale factor linearity, turn-on to turn-on repeatability, and maximum input rate. The breakthrough DSP design is covered by multiple patents and overcomes the limitations of analog signal processing, virtually eliminating temperature-sensitive drift and rotation errors.*

* This product is covered by one or more patents, including U.S. Patent #6,429,939, "DSP Signal Processing for Open Loop Fiber Optic Sensors."

Watch the Video

CG-5100: Choosing the Right FOG to Meet Your Needs

White Papers & Case Studies

  • Learn more! Download and read our white papers for more details about KVH's fiber optic gyro technology.


* To access these manuals, you will be required to provide us with your contact information.

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