High Accuracy 0.3° Fiber Optic Gyro North Finder with Fast Start-Up

NF701 Fiber Optic Gyroscope North Finder is a compact, high-precision north-seeking system that determines true north autonomously without GNSS. It measures the Earth’s rotation rate through a fiber optic gyroscope and computes azimuth and attitude information for mobile platforms.
Featuring north-seeking accuracy of ≤0.3° (1σ), alignment time under 3 minutes, and RS-422 interface, it integrates a FOG, accelerometer, rotation servo, and embedded controller.
The system operates reliably across -40 °C to +70 °C and is suitable for surveying, drilling, and defense applications requiring rapid, magnetic-independent north reference.

Overall dimensions

Dimension (mm): 115 × 90 × 110

1.2 Main technical indicators

A) North seeking time: ≤ 3 min;

B) North seeking accuracy (1σ): ≤ 0.3 ° (NF701A); ≤ 0.5 ° (NF701B)

C) Horizontal accuracy: ≤ 0.05 ° (1σ);

D) Circumference: ≤ 0.5 ° (1σ)

E) Weight: ≤ 2 kg;

F) Power supply: DC 12V ~ 24V;

G) Power consumption: 15 W (peak);

H) Interface: RS422

I) Working mode: start automatic self-check after power on, control north seeking by the upper computer, and send north seeking results to the upper computer after north seeking is completed;

1.3 Environmental requirements

1) Working temperature: -40 ℃ ~ + 70 ℃;

2) Storage temperature: -55 ℃ ~ + 85 ℃.

3) Humid and hot environmental conditions: relative humidity is less than 95%.

4) Appearance: The metal surface shall be free of rust, and the coating shall be free of blistering, peeling, etc.

1.4 Electrical performance

Insulation resistance: the insulation resistance between the independent circuits of the fiber optic gyroscope north finder and between the circuit and the shell shall not be less than 10 MΩ under standard atmospheric conditions.

1.5 Reliability and maintainability

MTBF ≥ 1000 hours;

MTTR ≤30min.

1.6 External interface

1.6.1 With DC12 V ~ 24V power input.

1.6.2 With serial port output function.

1.8.3 External plug:

Interface Y50EX-0607TX2, see the table below for pin definition.

high accuracy fiber optic gyro

fast start-up north finder

0.3° precision gyro sensor

High Accuracy 0.3° Fiber Optic Gyro North Finder with Fast Start-Up Images