A New Amperemeter


    A NEW aperiodic millivolt and amperemeter for continuous and alternating currents has been brought to our notice by Messrs. Isenthal and Co. The operation of the instrument is based on methods already described by Drude and Klemenčic, in which the current to be measured is caused to heat up thermojunctions, thus setting up indirectly a current which actuates the movement of the instrument. The novelty in the present instrument consists in the arrangement adopted for combining the action of a number of thermojunctions in such a manner that thermocurrents are produced of sufficient magnitude to deflect an ordinary pivoted moving-coil instrument.

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    A New Amperemeter . Nature 83, 413 (1910). https://doi.org/10.1038/083413a0

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