Guildline Instrument’s 6625A-QHR System has been designed and developed to meet the needs of Standards Laboratories around the world for an improved level of accuracy in the calibration and maintenance of primary resistance standards


  • Complete Turn-Key System – Fully Integrated and Ready to Use!
  • Built in Nano-Voltmeter for Hall Resistances and Longitudinal Resistances!
  • Pre-Cool with Nitrogen for Cost Savings!
  • 4 to 6 Day Uninterrupted QHR Operation!
  • Option for Magnetic Field Strength up to 14 Tesla!
  • Best DCC Accuracy: ± 0.02 ppm of Reading!
  • Premium QHR Sample Included, built by NMI with 20 years’ Experience!
  • BridgeWorks™ Data Acquisition Software!