Harwell RS-X Series
Precision Metrology Resistance Standards
All values are 15-30 day lead time for characterization.
The Harwell RS-X series represents the culmination of a five-year development process, involving rigorous testing and prototyping to achieve one goal: creating the most stable and cost-efficient resistors on the market, rivaling those that cost thousands more.
Each instrument is meticulously crafted and assembled in the United States to meet Harwell’s exacting standards. The binding posts, made from engineering-grade plastics and tellurium copper, are designed to minimize thermal EMF. The enclosure is machined from aerospace-grade aluminum and permanently sealed for life, providing a robust housing for the lifetime of the product. These standards are ideal for primary and secondary calibration labs, as well as industrial applications and professional hobbyists who demand precision.
Key Features
RS-3 Ultra Low Drift & TCR
- Double Hermetically Sealed in Silicone Fluid.
- Specially aged and TCR-matched 10 resistor array providing the lowest possible TCR and drift with cutting-edge resistor technology.
- TCR < 0.5 ppm/C 15°C to 30°C.
- 1 Year Drift < 2.5 ppm/yr.
- Includes Temperature characterization and Calibration certificate.
RS-7 Low Drift, Low TCR
- Single Hermetically Sealed in Argon.
- Specially aged 3 resistor array providing low TCR and drift.
- TCR < 3 ppm/C 15°C to 30°C.
- 1 Year Drift < 4 ppm/yr.
- Includes Temperature characterization and Calibration certificate.
Warranty and Calibration
One-year warranty included with every resistor.
Each unit is individually calibrated and characterized upon order to provide resistance vs. temperature data and is supplied with a detailed calibration certificate.
Calibration lead time: Please allow up to 14 days for completion.
Shipping
We ship domestically and internationally.
Products are shipped 2X weekly from our lab New York City.