National Physical Laboratory

Products & Services

We offer calibration of Resistance standards from 100 μΩ to 1 GΩ, and DC Voltage standards of both the electronic and cell types. We provide electrical traceability to other National Measurement Institutes, accredited calibration laboratories, and directly to industry. Our measurements also underpin the services offered by many other sections of NPL.

We have a proven track record in manufacturing cryogenic current comparators for resistance measurement, and electronics for biasing Josephson array voltage standards.

Electrical Quantum Standards products & services


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