Auniontech FGM3D Triaxial Fluxgate Magnetometer
| Brand | Auniontech |
|---|---|
| Origin | Shanghai, China |
| Manufacturer Type | Authorized Distributor |
| Country of Origin | China |
| Model | FGM3D |
| Pricing | Available Upon Request |
| Measurement Ranges | ±75 µT to ±1000 µT (configurable) |
| Bandwidth | Up to 6 kHz |
| Output Interface | RS232 (FGM3D UWD), Optional Analog/USB/Digital Variants |
| Housing Material | PEEK or POM |
| IP Rating | IP67 (waterproof) |
| Orthogonality Error | < 0.1° (with compensation coils) |
| Resolution | Down to 70 pT (at ±250 µT range) |
| Power Supply | ±15 V DC |
| Operating Temperature | –20 °C to +70 °C |
| Noise Floor | < 10 pT/√Hz (typ. at 1 Hz) |
Overview
The Auniontech FGM3D Triaxial Fluxgate Magnetometer is a high-stability, low-noise vector magnetometer engineered for precise measurement of static and time-varying magnetic fields in all three orthogonal axes (Bx, By, Bz). Based on the well-established fluxgate principle—where a highly permeable core is driven into saturation by an AC excitation current, and field-induced asymmetry in the second-harmonic output is linearly proportional to the ambient DC or low-frequency AC field—the FGM3D delivers exceptional accuracy, long-term drift stability, and robust performance across demanding scientific and industrial environments. Its compact, hermetically sealed housing—constructed from chemically inert, non-magnetic PEEK or POM—ensures mechanical rigidity, thermal stability, and IP67-rated protection against dust and immersion, making it suitable for both laboratory-grade metrology and field-deployable geophysical or marine applications.
Key Features
- Triaxial vector measurement with simultaneous, independent analog/digital outputs for each axis (Bx, By, Bz)
- Configurable full-scale ranges from ±75 µT up to ±1000 µT, optimized for sensitivity or dynamic headroom
- Bandwidth options spanning 2 kHz (standard), 3 kHz, 4 kHz, and up to 6 kHz for high-speed transient capture
- Resolution as low as 70 pT (achieved at ±250 µT range with enhanced orthogonality and noise suppression)
- Orthogonality error < 0.1° (available with integrated 3-axis compensation coils, e.g., FGM3D/125-C3T variant)
- Low intrinsic offset drift (< 0.1 nT/°C) and thermal hysteresis, enabling multi-day unattended monitoring
- Low-noise floor of < 10 pT/√Hz (typical at 1 Hz), critical for biomagnetic and paleomagnetic studies
- DC-coupled analog outputs + configurable digital data stream via RS232 (FGM3D UWD), supporting real-time streaming and synchronization
Sample Compatibility & Compliance
The FGM3D is fully compatible with non-ferromagnetic sample environments and requires no physical contact with the measured field source. It is routinely deployed in magnetically quiet laboratories (e.g., mu-metal shielded rooms), electron microscopy facilities (for objective lens field mapping and stray field characterization), and outdoor geophysical arrays. The instrument complies with ISO/IEC 17025–aligned calibration traceability protocols; factory calibration includes NIST-traceable field standards and temperature-compensated linearity verification over its operational range (–20 °C to +70 °C). For regulated environments—including GLP-compliant materials testing labs and FDA-audited biomedical instrumentation development—the optional firmware-enabled audit trail and timestamped binary data logging support 21 CFR Part 11 readiness when integrated with validated host software.
Software & Data Management
Auniontech provides a cross-platform configuration and acquisition utility (Windows/macOS/Linux) supporting real-time visualization, spectral analysis (FFT), vector magnitude computation (√(Bx² + By² + Bz²)), and batch export in CSV, HDF5, or MATLAB .mat formats. The RS232 protocol supports ASCII and binary modes with user-definable sampling rates, packet structure, and checksum validation. For system integrators, a documented C/C++ SDK and Python API (via PySerial or custom drivers) enable seamless embedding into custom DAQ architectures, UAV telemetry stacks (e.g., MagDrone), or borehole logging systems (e.g., SENSYS BM2-compatible deployments). All firmware updates are delivered via signed hex files with CRC-verified installation.
Applications
- Passive magnetic shielding evaluation (e.g., residual field mapping inside Helmholtz cages or MSR rooms)
- Electron microscope column field calibration and stray field diagnostics
- Ocean-bottom and downhole magnetic surveys (FGM3D UW variant optimized for pressure-resistant housings and saltwater corrosion resistance)
- Airborne magnetic anomaly detection (MagDrone platforms, fixed-wing UAVs)
- Long-term geomagnetic observatory monitoring (intermittent or continuous operation with solar-powered telemetry)
- Material science: domain wall dynamics, soft magnetic film characterization, and eddy-current induced field imaging
- Biomedical research: magnetoencephalography (MEG) sensor array reference monitoring and gradient coil field validation
FAQ
What is the difference between FGM3D and FGM3D UWD?
The FGM3D UWD adds a standardized RS232 interface with configurable baud rate, data framing, and real-time streaming mode—ideal for embedded telemetry or automated test systems.
Can the FGM3D operate in high-gradient magnetic fields?
Yes—its differential fluxgate architecture inherently rejects common-mode gradients up to ±500 µT/m, provided the sensor center remains within the uniform region of interest.
Is factory recalibration required annually?
While not mandatory, annual recalibration against traceable field standards is recommended for metrology-critical applications; drift is typically < 0.5 nT/month under stable thermal conditions.
Does the device support external triggering or synchronization?
Yes—via TTL-compatible trigger input (optional add-on), enabling phase-locked measurements with pulsed field sources or laser timing systems.
Are custom cable lengths or connector types available?
Yes—Auniontech offers OEM-configurable cabling (e.g., MIL-DTL-38999, LEMO 00, or miniature coaxial) with EMI-suppressed shielding and vacuum-rated variants upon request.
