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  1. OS-260 & OS-270 Resistance Decade Boxes / RTD Simulator
    • The revolutionary ohmSOURCE microprocessor controlled resistor is like nothing you have ever seen before!
    • US Patent 6487456
    • Two cost-effective models available
    • Accuracy's as tight as 0.01%, with resolution as good as 0.01Ω
    • Engineered as an ideal RTD calibrator 
  2. HPRS Series High Power Resistance Decade Box
    • Resistance from 1 mΩ to 10 MΩ
    • Power Rating : 225 W/decade, 250 W max. or higher (contact IET for custom higher power units)
    • Accuracy: 0.5% or 1%
    • Special and custom configurations available
  3. esi SR1 Calibration Resistor
    • New Design, with improved specifications
    • Versatile working calibration resistor
    • Laboratory standard of high accuracy and stability
    • Adjusted to within 20 ppm of nominal
    • 50 ppm long-term accuracy for most values

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