Please find the detailed product specification sheet attached.

1.1 Product Purpose

The gyro north seeker is used to rapidly and autonomously determine true north. It relies on two fundamental properties of the gyroscope – precession and rigidity – to achieve autonomous north-seeking. By tracking the earth's rotation rate with a high-precision fiber optic gyro and processing the resulting signal, the instrument computes the angle between the gyro's main axis and true north, providing azimuth information to the carrier platform.

1.2 Product Composition

The gyro north seeker is an electromechanical instrument consisting of a fiber optic gyro, an accelerometer, a mechanical rotation control mechanism, and an embedded computer.

1.3 Key Technical Parameters

● North-seeking range: ±70° (latitude range)

● North-seeking accuracy: ≤0.03° (1σ)

● Repeatability: ≤0.1° (1σ)

● North-seeking time: ≤3 min

● Circular linearity (1σ): ≤0.05°

● Operating voltage: AC220V ±10%, 50Hz

● Power consumption: ≤ 50W

● Weight: ≤ 7.5kg

1.4 Electrical Performance

Insulation resistance: Under standard atmospheric conditions, the insulation resistance between independent circuits of the gyro north seeker, and between the circuits and the housing, shall be no less than 100 MΩ.

1.5 Maintainability

● MTBF ≥ 1000 hours

● MTTR ≤ 30 min

2. Environmental Requirements

● Operating temperature: -40℃ to +50℃

● Storage temperature: -55℃ to +65℃

The NF-Series North Finder is a rugged inertial orientation instrument designed to provide fast, autonomous, and high-accuracy True North reference without GPS or magnetic sensors. Based on fiber optic gyroscope (FOG) technology, it measures Earth’s rotation angular velocity and calculates the azimuth angle between the host platform and geographic north.

With ≤3-minute alignment, 0.1° class accuracy, ±15° tilt adaptation, and RS422/RS232 output, the device is suitable for geodetic survey, tunnel construction, underground mining, radar/antenna alignment,  mobile mapping, and GNSS-denied navigation.

Unlike magnetic compasses, the NF-Series is not affected by steel structures, power cables, or electromagnetic noise. Its solid-state optical gyro has no rotating parts, offering high shock resistance and long-term reliability in field,  and industrial environments.

Applications:​ surveying, mining, tunneling, defense, antenna alignment, drone ground test, INS initialization, oil drilling, bridge/dam monitoring.

Outputs:​ True North azimuth, pitch, roll, status, timestamp.

Interfaces:​ RS232 / RS422 / CAN / Ethernet (model dependent).

Supply:​ 9–36V DC.

Environment:​ −40°C to +70°C, IP65 optional.