3-axis magnetometer DX-820

USBdigital

The DX-820 Handheld Triaxial Fluxgate Magnetometer is a portable, high-precision 3D fluxgate instrument for nT-level weak magnetic field measurement in scientific research and industrial testing. It integrates an ultra-sensitive triaxial fluxgate probe, advanced analog/digital acquisition circuitry and a capacitive touchscreen interface for efficient field and laboratory use.

Key features

• Capacitive touchscreen with adjustable backlight
• AC/DC magnetic field measurement
• Orthogonality correction algorithm
• 5¾-digit reading resolution
• Intelligent (automatic) range switching
• FFT analysis with spectrum display
• Bilingual display (Chinese and English)
• Intelligent probe recognition
• High-speed / low-speed switching
• Measured values and curves displayed (3D and per-axis)
• Spherical coordinate display (vector and tilt/deflection angles)
• 3-channel analog output (BNC)
• Extreme/maximum value display and peak hold
• Ultra-low sensor noise
• Threshold detection with 3D alarm modes (None / Within Range / Outside Range)
• Data storage (single/continuous), callback and export
• USB-C (TYPE-C) data communication; general instruction set supporting LabVIEW

Functions and user interface

• Measurement interface shows: 3D magnetic field value, vector value, deflection/tilt angle, range, AC/DC mode, field direction, unit, time, probe ID and battery level
• Touch buttons for zeroing, AC/DC switching, unit switching, range switching, data saving, max/min display, screen hold and menu
• Menu settings: threshold settings, version info, curve viewing, communication settings, device settings, calibration, save/view
• Curve function: three-dimensional time-domain curves, single-axis display, peak detection and FFT (0–2048 Hz) with peak magnitude/frequency
• Host PC data-reading software: real-time monitoring, recording/plotting, automatic probe calibration, auto-zero, auto-range, threshold alarms and time/brightness settings

Applications

• Monitoring Earth's environmental magnetic field, laboratory and space magnetic fields
• Calibration of magnetic shielding and field sources
• Detection of weak magnetic fields in geological exploration and petroleum drilling systems
• Measuring attenuation and shielding effectiveness of magnetic shielding systems and magnetically shielded rooms
• Dipole moment and remanent magnetic field testing of satellite equipment
• Calibration standards for fluxgate and magnetoresistive magnetometers and other sensors
• Earthquake precursor monitoring, volcano observation and similar geophysical/environmental work
• Airborne and marine magnetic surveys; weak magnetic field research in biological sciences

Technical specifications

• Model: DX-820 (Handheld Triaxial Fluxgate Magnetometer)
• Probe options and ranges: selectable ±100 μT and ±1000 μT
• Display units: nT, μT, mGs
• Resolution: 0.1 nT
• Accuracy: DC ≤ 0.5% RDG; AC ≤ 1% RDG
• Host bandwidth: 50 kHz
• Response frequency: ≤ 2 kHz
• Sensor noise: 10 to ≤20 pTrms/√Hz at 1 Hz
• 3D orthogonality error: < 1°
• Hysteresis: < 2 nT at 1 × full scale
• Temperature coefficient of error: ±1 nT/℃ (one range) and ±10 nT/℃ (extended range)
• Warm-up / scaling: 15-minute scaling capability
• AC (≤100 Hz) ranges: ±100 μT / ±1000 μT
• AC (>100 Hz) (RMS): ±50 μT (RMS) / ±500 μT (RMS)
• Dimensions (main unit): 195 mm × 90 mm × 40 mm
• Probe size (standard): 24 mm × 24 mm × 109 mm; miniature probe: 20 mm × 20 mm × 20 mm (for confined-space measurement)
• Display: 5-inch capacitive touchscreen, 720 × 1280 resolution
• Analog interface: BNC (3-channel analog output port)
• Communication: TYPE-C (USB-C)
• Power supply: built-in lithium battery
• Power consumption: 4.2 W
• Continuous operation (battery): ~3.5 hours
• Adapter probe (standard): 3D fluxgate sensor DXS-101L
• Main unit weight: 362.8 g
• Supported software: host data-reading software with recording/plotting, automatic probe calibration, real-time serial transmission and fixed-instruction querying