1750 IMU

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Inertial Solutions in Autonomous Ground Reference Systems

High-performance Inertial Sensor for a Wide Range of Unmanned Applications
The 1750 IMU offers exceptional precision in a compact form, making it ideal for use where space is limited. By pairing the E•Core® ThinFiber technology of the KVH DSP-1750 FOG – the world’s smallest precision FOG – with solid state MEMS accelerometers, the result is an inertial system that integrates easily into the most demanding applications at a lower cost than comparable systems.

Innovative Package
Attributes such as small size, light weight, and high performance, combined with low power consumption and extremely accurate data output, make the 1750 IMU ideal for new or drop-in replacement designs. It measures 88.9 mm Dia. x 73.7 mm H (3.5" x 2.9"), weighs less than 0.7 kg (1.45 lbs), and has a power consumption of less than or equal to 5 watts (typical).

Next Generation Applications
The 1750 IMU is highly adaptable, featuring industry standard RS-422 protocol, with user programmable data output rates from 1 to 1000 Hz. It addresses a range of uses, including autonomous vehicles; unmanned aerial surveillance, surveying, and mapping; autonomous research and exploration; humanoid robots; and oil and gas pipeline inspection equipment.

A Winning Year for Robots and KVH
DARPA Challenge robots relied upon KVH IMUs to stay on track. Find out more. Read more »

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Performance Fiber Optic Gyro

Fiber Optic Gyros


Input Rate (maximum)


Bias Instability (25°C)

≤0.1°/hr, 1σ (max)
≤0.05°/hr, 1σ (typical)

Bias vs. Temp (≤ 1 °C/min)

≤1°/hr, 1σ (max)
≤0.7°/hr, 1σ (typical)

Scale Factor Non-Linearity (max rate, 25°C)

≤50 ppm, 1σ

Scale Factor vs. Temp. (≤ 1 °C/min)

≤200 ppm, 1σ

Angle Random Walk (25°C)


Bandwidth (-3dB)

≥440 Hz

Technology - Accelerometers
MEMS Silicon
Input Limit (maximum)
±10 g
Bias Instability (constant temp)

≤0.05 mg, 1σ

Scale Factor Temperature Sensitivity
250 ppm/°C, 1σ (max),
≤100 ppm/°C, 1σ (typical)
Velocity Random Walk (25°C)
(0.23 ft/sec/√hr)
Bandwidth (-3dB)*
≥200 Hz
Initialization Time (valid data)

≤1.5 secs

Data Interface

Asynchronous or Synchronous RS-422

Baud Rate
Selectable 9.6 Kbps to 921.6 Kbps
Data Rate

User selectable 1 to 1000 Hz

Dimensions (max)

88.9 mm Dia x 73.7mm H
(3.5" x 2.9")

Weight, max

0.7 kg (1.45 lbs.)

Power Consumption, max (typical)

8 W (max),
5 W (typical)

Input Voltage

+9 to +36 VDC

Temperature: Operating

-40°C to +75°C
(-40°F to +167°F)

Shock: Operating

9 g, 11 msec, sawtooth

Vibration: Operating

8 g rms, 20-2000 Hz

*Based on Accelerometer manufacturer specifications, verified during test

Brochures & Datasheets

Document File Info
DATASHEET - 1750 IMU PDF file 752 KB / 2 pg
DATASHEET - 1750 光ファイバージャイロ慣性計測装置 - (Japanese) PDF file 837 KB / 2 pg

Additional Documents, Forms & Pricing

White PapersFile Info
High Accuracy Multi-Sensor Navigation Solutions for Overcoming GNSS in Unmanned and Autonomous Systems - 3rd Edition - This paper discusses how the combination of high performance KVH inertial measurement units integrated with GNSS results in extremely precise inertial navigation solutions that overcome numerous GNSS vulnerabilities. PDF file 1.5 MB / 7 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.


Overview of KVH's Fiber Optic Gyros  
  • Superior precision – bias instability ≤ 0.05°/hr, 1σ, highly accurate 6-degrees-of-freedom angular rate and acceleration data
  • Compact package – 88.9 mm Dia. x 73.7 mm H (3.5” x 2.9”), <0.7 kg (<1.4 lbs.)
  • Rugged design for extreme environments, with excellent shock, vibration, and thermal performance
  • Industry standard Asynchronous or Synchronous RS-422 protocol
  • Flexible, user-friendly programmable data output rates from 1 – 1000 Hz
  • Built with KVH’s precision DSP-1750 FOGs, using proprietary E-Core ThinFiber, for high reliability and stable performance
  • High performance commercial-off-the-shelf (COTS) inertial system for challenging applications

Watch the Videos

1750 IMU: How to Choose the Right Fiber Optic Gyro

Meeting of the Minds 2014: Flyover Mapping & Modeling

The Carnegie Mellon team is participating in the Google Lunar XPRIZE, constructing a system to capture high resolution images for use in mapping of the moon’s surface. Multiple sensors are being employed by the team, the 1750 IMU is crucial to providing precise relative motion of the platform, enabling extremely accurate modelling of the ground below.

Featured Options

  • User has opportunity to create the desired message output from both the FOGs and the integrated accelerometers of the 1750 IMU.
  • Package dimensions and mounting features enable easy drop-in replacement.
  • FOG/IMU Developer’s Kit with easy-to-use software accelerates your IMU and FOG integration, development, and interface efforts. Learn more.

Exclusive Technology

  • E•Core ThinFiber
    KVH’s proprietary polarization maintaining E•Core ThinFiber delivers outstanding precision performance in much smaller size gyros, such as the DSP-1750 FOG. By reducing the overall diameter of KVH’s standard E•Core fiber, the resulting E•Core ThinFiber dramatically increases the accuracy of our standard size gyros, and produces small FOGs that deliver extremely high bandwidth and low noise.
  • DSP Technology
    KVH’s Digital Signal Processing (DSP) electronics improve fiber optic gyro performance in such critical areas as scale factor and bias vs. temperature, scale factor linearity, turn-on to turn-on repeatability, and maximum input rate. The innovative DSP design is covered by multiple patents and overcomes the limitations of analog signal processing, virtually eliminating temperature-sensitive drift and rotation errors.

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 white papers, you will be required to provide us with your contact information.


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

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