GUILDLINE Instruments NEW 6540 Dual Measurement High Resistance Bridge provides the best uncertainties of any commercially available high resistance measurement instrument available today.


  • Bridge and Direct Measurement Modes of Operation
  • Resistance Range 100 kΩ to 20 PΩ
  • “True Ratio” Provides Multi‐Ratios from 1:1 up to 100:1
  • Test Voltages 1 to 1000 V
  • Optional Current Measurement to 100 fA
  • Better Performance & More Functionality than Commercially Available Dual Source Bridges
  • Easy‐to‐Use Front Panel with a Single ‘Push-of‐a‐Button’ to Make a Measurement
  • Automatic Ranging for Voltage and Other Measurement Parameters
  • Logging and Analysis of Measurements
  • Automation of Multiple Measurements with Guildline 6564 Resistance Scanner
  • Surface and Volume Resistivity Measurements with 65221 Test Fixture
  • IEEE‐488.2 and RS232C with SCPI Commands