FOG-based Inertial Measurement Units

In production since 2024

The U Series FOG-based inertial measurement units (FOG IMUs) are characterized by low-noise performance, miniature size, lightweight design, and minimal power consumption. ​ These IMUs integrate three of our smallest fiber optic gyros with three MEMS/pendulum accelerometers. They also include a fully-integrated ADC board with RS422 interface (See Pin Assignment , Communication Protocol).

The U183(M) is an ultra-compact cylindrical FOG IMU weighing 200 grams.  It operates at a power consumption of 2W and exhibits 0.03°/√h ARW. Additionally, this unit offers two levels of magnetic immunity.

The U123D(M) is a smaller cylinder-shaped unit weighing 150 grams. ​ It consumes 1.5W of power and delivers 0.05°/√h ARW. Similar to the U183(M), the U123D(M) provides two levels of magnetic immunity.

Another FOG IMU with a compact form factor is the U121D. ​ With dimensions of 56x63mm and a weight of 180 grams, this unit requires 1.5W for operation and offers 0.05°/√h ARW. ​

The U173 is a slightly larger unit, featuring a footprint of 62x62mm and weighing 250 grams. ​ It consumes 3W of power and delivers 0.03°/√h ARW. Notably, this unit incorporates pendulum accelerometers.

 

The U183(M), U121D and U123D(M) are non-ITAR FOG IMUs

 

Typical applications:

– Inertial Navigation Systems (INS) for UAVs / drones
– Inertial Navigation Systems (INS) for UUVs / USVs / ROVs
– Flight Control

 

Access technical documents in FOGs & FOG IMUs DOCUMENTS

 

U183(M)

300 °/s Gyro

10 g Acc

2 Watt

200 (250) gram

0.3 (0.01) °/h/Gauss


Datasheet

U121D

400 °/s Gyro

10 g Acc

1.5 Watt

180 gram

0.3 °/h/Gauss


Datasheet

U123D(M)

400 °/s Gyro

10 g Acc

1.5 Watt

150 (200) gram

0.3 (0.01) °/h/Gauss


Datasheet

U173D

300 °/s Gyro

50 g Acc

3 Watt

250 gram

0.3 °/h/Gauss


Datasheet