Electronic compass GCM370-MI-SJ

3Dtilt-compensated

Product overview
The GCM370-MI-SJ is a compact 3D electronic compass combining a triaxial magnetometer and a triaxial accelerometer to provide real-time heading and tilt data. Designed for low power consumption and high measurement resolution, it includes hard-iron and soft-iron calibration algorithms and tilt compensation via the accelerometer, ensuring stable heading output across a full 360° range even in the presence of fixed magnetic interference.

Key features

• Azimuth accuracy: 0.5°
• Tilt resolution: 0.1°; tilt accuracy (full range): <0.2°
• Roll measurement range: ±180°; Pitch range: ±85°
• Standard TTL output; binary high-performance protocol
• Maximum output rate: 20 Hz; communication: 9600–115200 baud (default 9600)
• Supply voltage: DC +5V; operating current: 5 mA; sleep: 343 μA
• Operating temperature: -40°C to +85°C; protection rating: IP67

Technical specifications

• Model: GCM370-MI-SJ
• Heading resolution: 0.1°
• Calibration: Hard-iron and soft-iron supported; optional planar rotation / multi-point calibration
• Board dimensions: 67 × 12 × 9 mm; weight: ≤10 g (excluding terminal wire)
• Terminal wire length: 30 cm
• Startup delay: <50 ms
• Output format: Binary high-performance protocol (TTL)
• Shock: 100g @ 11 ms, triaxial (half-sine); Vibration: 10 grms (10–1000 Hz)
• EMC: Compliant with EN61000 and GBT17626; Insulation resistance: ≥100 MΩ
• MTBF: ≥98,000 hours/cycle

Typical applications

• Handheld terminals and mobile devices
• Antenna attitude control and positioning
• Vehicle attitude sensing and navigation subsystems
• Drilling measurement tools and downhole instrumentation
• System integration and OEM instruments

Compliance & environmental

• Operating / storage temperature: -40°C to +85°C
• Protection: IP67
• Electromagnetic compatibility and reliability standards met as specified