AccuBridge® 6020Q Quantum Hall Ratio/Resistance Bridge

Self-Calibration Quantum Hall Ratio/Resistance Bridge

  • NEW Current Algorithm following CCC methodology.
  • NEW Zero-filter option
  • NEW Microcontroller
  • NEW Capacitive touchscreen and user interface
  • LEMO connectors for resistor connections
  • Quantum Hall Applications Including Gallium Arsenide and Graphene Sample Measurements
  • Vcr, Vxx, and Vxy Measurements
  • Self-Calibration of the Binary Wound Current Comparator (27-bit) plus Nanovolt
  • Detector Reading
  • Maximum Ratio 14:1
  • Resistance Range 0.1 Ω to 100 kΩ
  • Capacitive 7″ Touch Screen
  • Best Accuracy < 0.015 µΩ/Ω
  • IEEE-488.2 standard
Features & Benefits

As the leading provider of top-notch resistance measuring equipment, Measurements International (MI) proudly presents the AccuBridge® 6020Q Automated Resistance Bridge. Known for its exceptional speed, precision, and measurement accuracy, the 6020Q is the preferred choice of National Measurement Institutes (NMIs) across the world. Its innovative design and user-friendly operation make it an ideal solution for stand-alone resistor calibrations and primary resistance measurements. With its unparalleled performance, the 6020Q is sure to raise the bar in the world of resistance metrology.

Feature Benefit
DCCT based. Provides excellent stability and range linearity.
Vcr, Vxx and Vxy measurements. Supports dissipation and contact resistance checks.
Accuracy < 0.015 µΩ Allows sub-ppm high-stability measurements.
Maximum Ratio 14:1 Wide ratio range to cover laboratory standards and RK/2
National lab continuity. The only commercially available QHR resistance bridge used in primary or national laboratories worldwide.
Full DCC resistance range. 0.1 Ω to 100 kΩ.
Stable low currents. 1 μA to 200 mA ensures ultra-low noise measurements.

Resistance Measurement 0.1 Ω to 100 kΩ

(1:1 Ratio)




(1:10 Ratio)



0.1 Ω to 0.1 Ω 0.15 0.1 Ω to  1 Ω 0.1
1 Ω to 1 Ω 0.015 1 Ω to 10 Ω 0.015
10 Ω to 10 Ω 0.015 10 Ω to 100 Ω 0.015
100 Ω to 100 Ω 0.015 100 Ω to 1 kΩ 0.015
1 kΩ to 1 kΩ 0.015 1 kΩ to 10 kΩ 0.015
10 kΩ to 10 kΩ 0.5 1 kΩ to 12.9 kΩ 0.015
  10 kΩ to 100 kΩ 0.05
  1. As a ratio device the accuracy specifications can be improved upon based on your standards and environmental conditions.
  2. Ratio bridge where the ratio accuracies can be verified at anytime using the interchange technique method for 1:1 ratio measurements with the following equation re=(Ra-1/Rb)/2
  3. Uncertainties follow GUM at 2 sigma level (95%) along with the degrees of freedom
Measurement Mode 4-wire
Linearity < 0.005 x 10-6 of full-scale
Operating Conditions 10 °C to 35 °C, 10 % to 90 % RH non-condensing
Test Current Range 1 μA to 200 mA
Test Current Resolution 18-bit
Interface IEEE-488
Display Touch-screen display (no external keyboard), resolution 0.001 x 10-6

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