PTB's Sielectric-constant Gas Thermometer (IMAGE)

Physikalisch-Technische Bundesanstalt (PTB)

PTB's Sielectric-constant Gas Thermometer

Caption

PTB scientist Christof Gaiser with the core of the dielectric-constant gas thermometer. The different silver-colored pressure vessels have special capacitors which are filled with helium to carry out the measurement that takes place inside them.

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(Photo: PTB)

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