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Planck-Balances with variable weighing range

PTB-News 2.2020
29.04.2020
Especially interesting for

manufacturers of weighing instruments

mass metrology

Experimental model of a Planck-Balance.

The high-precision Planck-Balance, developed by PTB in cooperation with TU Ilmenau, measures over a continuous mass range and works according to the principle of electromagnetic force compensation. To put it more simply: a weight placed on the one side of the balance for weighing is compensated for on the other side by an electric force. This electric force is inextricably linked to Planck᾽s constant which thus allows the kilogram, the SI unit of mass, to be traced according to its new definition. Hereby, the current to be measured is adjusted to the given weight via several serially connected coils and several switchable resistors. Thus, this setup allows a large measuring range from 1 mg up to 1 kg to be achieved while ensuring a compact design for variable laboratory use. (Technology Offer 488)

Advantages

large measuring range

compact design

variable applications

Contact person for questions about technology transfer

Andreas Barthel,
Phone: +49 531 592-8307,
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