CG-5100 IMU

The versatile, commercial CG-5100 Inertial Measurement Unit (IMU) combines proprietary technologies – highly accurate KVH fiber optic gyros (FOGs) coupled with industry proven MEMS accelerometers – all within a compact single enclosure, providing reliability and long term compliance to customer specifications.

KVH’s CG-5100 is a low drift, solid state, FOG-based commercial solution ideally suited for critical sensing applications and GPS-integrated navigation programs. This strap-down inertial subsystem offers outstanding reliability and accurate 6-degrees-of-freedom measurement, making it perfect for critical sensing applications and GPS integrated navigation programs. The CG-5100 achieves its excellent performance by employing proprietary algorithms to a fully digital gyro sensor output, enabling the system to characterize and correct for the effects of temperature and misalignment. It also offers the end user a convenient and easy-to-adapt output in a fully digital RS-232/RS-422 format.

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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

*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


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

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