Leeds and Northrup 4223B

1 mΩ Standard Resistor
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Description
The Reichsanstalt-Type 4222B Resistance Standard can be used in the accurate measurement of current with a potentiometer, and as a standard for comparison in low-resistance measurements. Value is 0.001 ohm with a measured accuracy of 0.002% @30 amps and can handle up to 100 amps.

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