Letter | Published:

Heat Loss Compensated Calorimeter

Nature volume 222, page 1061 (14 June 1969) | Download Citation

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Abstract

I HAVE designed a calorimeter intended essentially to eliminate systematic errors caused by temperature gradients. It is a calorimetric body with the core completely surrounded by a thermally isolated jacket of equal heat capacity (Fig. 1). Thermistors imbedded in both body and jacket, to indicate temperatures, form opposite arms of a Wheatstone bridge that is initially balanced when the core and jacket temperatures are at equilibrium. Unbalanced output voltages for small changes in temperature are therefore proportional to the sum of the temperature changes of the core and jacket from equilibrium. The jacket is surrounded by a shield that either remains at a constant temperature, or follows the rising temperature of the jacket, depending on the mode of operation.

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References

  1. 1.

    , Ann. Phys., Paris, 14, 237 (1940).

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Author information

Affiliations

  1. National Bureau of Standards, Washington, DC 20234.

    • STEVE D. DOMEN

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DOI

https://doi.org/10.1038/2221061a0

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