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High Precision 0.3 deg Accuracy Gyrocompass North Finder with RS422 Interface for Underground Mining

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High Precision 0.3 deg Accuracy Gyrocompass North Finder with RS422 Interface for Underground Mining

North Finder Dimension : 115 x 90 x 110mm

Place of Origin : China

Weight : <= 2 kg

Certification : ISO 9001:2015, CE, RoHS

Output : RS422

Azimuth Resolution : <= 0.5 deg

Horizontal Accuracy (1 sigma) : <= 0.05 deg

North Finding Accuracy : <= 0.3 deg (NF701A)

Model Number : NF701A

Brand Name : Firepower

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High Precision Gyrocompass North Finder System for True North Detection and Direction Measurement
The NF701A Fiber Optic Gyro North Finder is a rugged directional survey instrument for underground mining and tunnel boring operations. Its FOG-based north seeking technology provides reliable azimuth data in magnetically noisy underground environments where conventional compasses fail, operating flawlessly from -40 to +70 deg C.
Dimensions

115 x 90 x 110 mm

Technical Specifications
  • North seeking time: ≤ 3 minutes
  • North seeking accuracy (1 sigma): ≤ 0.3 deg (NF701A); ≤ 0.5 deg (NF701B)
  • Horizontal accuracy: ≤ 0.05 deg (1 sigma)
  • Circumference: ≤ 0.5 deg (1 sigma)
  • Weight: ≤ 2 kg
  • Power supply: DC 12V ~ 24V
  • Power consumption: 15 W (peak)
  • Interface: RS422
  • Working mode: Automatic self-check on power-up, controlled north seeking via upper computer
Environmental Requirements
  • Operating temperature: -40°C to +70°C
  • Storage temperature: -55°C to +85°C
  • Humidity: Relative humidity less than 95%
Reliability
  • MTBF ≥ 1000 hours
  • MTTR ≤ 30 minutes
Ideal Applications
  • Tunnel Boring Machine Guidance: Precise heading for TBM navigation in long-distance tunnel projects
  • Underground Mine Surveying: Magnetic-free north reference for drift and shaft alignment
  • Coal Mine Development: Reliable azimuth data for ventilation shaft and gallery planning
  • Subway Construction: Accurate directional control for urban metro tunnel boring
  • Hydroelectric Tunnel Projects: North reference for water diversion and penstock tunnel construction
External Plug Configuration (Interface Y50EX-0607TX2)
Plug Pin Number Functional Definition
a DC12V ~24V
b DC12V ~24V GND
c TD+
d TD-
e RD+
f RD-
g GND

Product Tags:

fiber optic gyro north finder

      

mining tunnel boring directional survey

      

0.3 deg accuracy NF701A seeker

      
China High Precision 0.3 deg Accuracy Gyrocompass North Finder with RS422 Interface for Underground Mining wholesale

High Precision 0.3 deg Accuracy Gyrocompass North Finder with RS422 Interface for Underground Mining Images

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