Electronic compass GCM380

3Dtilt-compensated

Product overview
The GCM380/GCM385-N is a 3D electronic compass providing tilt-compensated heading and magnetic-interference calibration. It combines a 3-axis magnetometer and a 3-axis accelerometer to deliver precise heading, roll and pitch measurements across a full ±180° roll and ±85° pitch range. Available as a sealed housing or as a standalone circuit board module, it supports easy integration via RS232, RS485 and TTL interfaces.

Key features

• Resolution: 0.1°
• Accuracy: Roll/Pitch 0.1°, Heading 0.5°
• Measurement range: Roll ±180°, Pitch ±85°
• Standard output interfaces: RS232 / RS485 / TTL
• Hard-iron, soft-iron and tilt compensation

Detailed description
The unit offers high resolution and strong resistance to environmental magnetic noise. Its built-in high-precision accelerometer enables reliable tilt compensation for stable heading data over the full roll range. Low power consumption, compact dimensions and IP67 protection make it suitable for handheld devices, mobile platforms, antenna orientation systems, automotive equipment and embedded system integration. Delivery options include a fully enclosed finished product or a bare PCB module to match application requirements.

Technical specifications

• Model: GCM380 / GCM385-N
• Optimal heading accuracy: 0.5°
• Compass resolution: 0.1°
• Pitch accuracy: 0.1° (for tilt <60°), 0.2° (for tilt <85°)
• Pitch tilt range: ±85°
• Roll accuracy: 0.1° (for tilt <60°), 0.2° (for tilt <180°)
• Roll tilt range: ±180°
• Resolution (pitch/roll): 0.1°
• Hard-iron calibration: Yes
• Soft-iron calibration: Yes
• Magnetic interference calibration method: 360° horizontal rotation; vertical rotation (optional)
• Housing dimensions: L57 × W49 × H25.5 mm
• Housing weight: ≤250 g (excluding cable)
• Interface connector: RS232 / RS485 / TTL via direct wireleads
• Startup delay: <50 ms
• Maximum output rate: 20 Hz/s
• Communication rate: 2400 to 115200 baud
• Output format: High-performance binary protocol
• Supply voltage (default): DC +5V
• Current (maximum): 30 mA
• Active mode current: 26 mA
• Sleep mode: To be defined (TBD)
• Operating temperature: -40℃ to +85℃
• Storage temperature: -40℃ to +85℃
• Vibration resistance (environment): 100 g
• Ingress Protection: IP67
• Electromagnetic compatibility: In accordance with EN 61000 and GB/T 17626
• Insulation resistance: ≥100 megohms
• Shock resistance: 100 g @ 11 ms, tri-axial (half-sinewave)
• Vibration resistance (spec): 10 grms / 10–1000 Hz