Low-field lab testing zero-gauss chamber DXGE-30T

Overview

The DXGE-30T Zero magnetic field shielding system provides a controlled near-zero magnetic environment with integrated magnetic-field generation and measurement functions for scientific research, industrial testing and medical applications. It supports testing of samples inside a near-zero cavity and the addition of coils to generate defined magnetic fields for experiments and production verification.

Key features

• Designed to overcome limitations of conventional Helmholtz three-dimensional geomagnetic compensation coils that cannot fully suppress real-time geomagnetic fluctuations.
• When configured with a high-precision fluxgate magnetometer, a high-precision linear power supply and a three-dimensional equal-diameter Helmholtz coil, the system provides extensive shielding and field-generation capability (system example range 0–100000 nT; coil specification range -1000000 nT to 1000000 nT).
• Independent X, Y and Z magnetic-field generation and control with 1 nT accuracy and 1 nT adjustment resolution.
• Applicable to laboratory research, industrial production tests, defence-related experiments and medical device testing.

System composition

• 1. Shielding tube
  • Creates a near-zero magnetic cavity and reduces external magnetic disturbances.
  • 4-layer shielding: residual field ≤ 10 nT; magnetic fluctuation ≤ 1 nT.
  • 5-layer shielding: residual field ≤ 1 nT; magnetic fluctuation ≤ 10 pT.
  • 6-layer shielding: residual field ≤ 1 nT; magnetic fluctuation ≤ 1 pT.
• 2. Circular three-dimensional equal-diameter coil
  • Coil magnetic field range (coil spec): -1000000 nT to 1000000 nT.
  • Uniform magnetic-field volume: 100 × 100 × 100 mm³.
  • Magnetic-field uniformity: better than < 1%.
  • Construction: oxygen-free copper enamelled wire; precision-molded GFRP coil frame; connectors on imported FR4 epoxy boards.
• 3. PC control software
  • Controls geomagnetic compensation coil group to eliminate geomagnetic influence.
  • Controls field-generation coil group to produce specified fields within the uniform area.
  • External input option to allow field setting from external signals.
  • Fixed-field mode to prevent the test sample from disturbing the generated field.
  • Real-time recording of magnetic-field changes with exportable data tables.
• 4. Programmable current source (power supply)
  • Precision DC constant-current source with fast response, high accuracy and long-term stability; suitable for resistive, inductive and capacitive loads.
• 5. Fluxgate magnetometer
  • Dexinmag series fluxgate magnetometers for measuring weak static and low-frequency vector magnetic fields with high stability, linearity and accuracy; fully digital output.

Technical specifications

• Typical system model reference: DXGE-30T.
• Magnetic-field generation accuracy (X, Y, Z): 1 nT; adjustment step: 1 nT.
• Shielding options and performance: 4-layer (residual ≤ 10 nT, fluctuation ≤ 1 nT), 5-layer (residual ≤ 1 nT, fluctuation ≤ 10 pT), 6-layer (residual ≤ 1 nT, fluctuation ≤ 1 pT).
• Coil magnetic field range (two reported ranges): system-level example 0–100000 nT; coil specification -1000000 nT to 1000000 nT.
• Uniform field volume of equal-diameter Helmholtz coil: 100 × 100 × 100 mm³; uniformity < 1%.
• Coil materials and construction: oxygen-free copper enamelled wire; precision-molded GFRP frame; FR4 epoxy-board connectors.
• Control and data: PC software with external input option, fixed-field mode, real-time logging and data export.
• Auxiliary equipment: high-precision fluxgate magnetometer and high-precision linear/current power supply included in the complete system.