Useful as potential divider for various electrical? experiments such as in null point? detection, works on the principle of variation of?resistance of a conductor with length. Comprising a?24SWG bare constantan wire stretched along a meter rule, sub- divided in centimeters and millimeters and clamped to stout plated brass end plates. The clamping system is designed to make good electrical contact with the wire at the exact ends of the scale thus leaving virtually no margin for 'end errors'. The terminating strips are provided with heavy-duty 4mm socket terminals and the complete assembly is mounted on a long baseboard. Supplied with spring type press jockey.

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