Digital fluxmeter DX-220A

The DX-220A is a high-precision digital flux meter for measurement and sorting of magnetic flux in permanent magnets, soft magnetic materials and various magnetic field sources. It integrates a built-in 24-bit AD acquisition system and automated functions to support rapid, repeatable testing and automated data handling.

Overview
Built-in 24-bit AD high-precision data acquisition independently developed by Dexinmag with acquisition and display resolution up to one millionth. Supports magnetic flux measurement with automatic upper/lower limit sorting and visible OK/NG results. The instrument uses an intelligent dynamic drift-adjustment algorithm and a zero-first-then-test method to eliminate the flux zero point and simplify operation. Provides automated communication interfaces for integrated mass-data test workflows and can be combined with optional PC software for large-scale data storage and automated measurement systems.

Key features

• Medical-grade 3.5-inch TFT true-color display with six-digit numeric readout for improved readability and precision
• Intelligent dynamic drift-adjustment algorithm for fully automatic drift compensation without manual intervention
• Zero-first-then-test method to remove magnetic flux zero point and display flux value directly
• Upper and lower limit sorting with visible OK/NG indication
• Automated communication interfaces for rapid automated testing and sorting
• Automatic compatibility with multiple measuring coils and fixtures without parameter re-adjustment
• Standard USB Type-B interface and optional PC software for automated measurement systems and mass data storage

Testing methods (summary)
Recommended sample placements: place cylindrical samples or magnetic tiles on the sample stage so field lines pass vertically through the coil; for coil or solenoid measurements place the longitudinal probe at the solenoid center and perpendicular to the magnetic field lines. Illustrative images and measurement schematics are provided for correct probe and sample positioning.

Technical specifications

• Input power: AC 220V ±10%, 50/60Hz, 1A
• Display mode: TFT true-color LCD, six-digit display
• Overall dimensions (W×D×H): 307 mm × 260 mm × 120 mm
• Weight: About 3.5 kg
• Operating environment: Temperature 0℃ – 50℃; Humidity 40% – 85% RH
• Thermal equilibrium time: Connect signal input device and wait ~20 minutes for drift stabilization
• Magnetic flux range: 10 mWb / 20 mWb / 50 mWb / 100 mWb (four-range, expandable)
• Minimum resolution: 0.1 µWb (applies across full range)
• Drift adjustment: Intelligent automatic drift adjustment (no manual operation)
• Integral drift: ≤1 µWb/min or 0.01%RG/min (whichever is larger)
• Accuracy: ≤0.3%RD + 10 µWb (for ≥50% full scale)
• Sorting function: Configurable upper and lower limit sorting parameters
• Communication interface: USB Type-B
• Automatic interface: Weld-free butt interface (optional)
• Digital output: RS232C interface (optional)
• Analog output: Full-scale corresponding ±10 V, weld-free butt interface (optional)
• Measuring software compatibility: Windows XP, Windows 7, Windows 10 (32/64-bit)
• Remarks: Product specifications may be updated; actual contract or datasheet prevails