MostaTech‘s G321M is a ruggedized 3-axis Fiber Optic Gyroscope (FOG) designed for precise angular velocity measurement in demanding marine and subsea environments.
Tailored to meet the stability and endurance requirements of oceanographic missions, it delivers reliable performance for integration into AUVs, ROVs, buoy systems, and other instrumented underwater platforms.
Encased in a corrosion-resistant aluminum alloy housing and measuring just 53 x 53 x 36 mm, the G321M is ideal for space-constrained subsea installations. It operates across a wide temperature range from -40°C to +70°C, with survival tolerance down to -55°C, supporting deployment in thermally dynamic ocean layers and extreme polar research zones. Engineered to maintain accuracy under mechanical stress, it withstands 6g RMS vibration and impacts up to 350g, ensuring consistent operation during launch, recovery, and transit through turbulent waters.
The G321M provides high-frequency inertial data with a 400°/s input range, 1 kHz bandwidth, and 8 kHz data output rate, enabling real-time stabilization, navigation, and georeferenced sensor alignment. Its fast response and low-noise performance make it suitable for hydrodynamic motion compensation, subsea station-keeping, and dead-reckoning in GPS-denied environments.
Weighing only 145 g (0.3 lb) and drawing just 2 W, the gyroscope is optimized for energy-conscious marine platforms. With an ARW of 0.025°/√h and a bias of 1°/h, the G321M delivers precise, low-profile inertial sensing for ocean technology developers operating in challenging marine contexts—from deepwater research to coastal unmanned exploration.
