Standard Resistors

Wilkins and Swan at NPL developed a resistor design flexible enough to allow windings with various resistance values to be made available and stable enough to be accepted world-wide as resistance standards. The design was commercialised by Tinsley and these resistors are ideal for both AC and DC thermometry bridges.

For lowest uncertainty the resistors are temperature controlled - our standard resistor maintenance bath is used for this. As a lower cost alternative we have a range of temperature controlled bulk metal foil resistors from 10 to 10,000 Ohms.

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