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oa High Temperature Gas Thermometry and the Platinum Metals
Some Aspects of Nineteenth Century Developments
- Source: Platinum Metals Review, Volume 31, Issue 4, Oct 1987, p. 196 - 207
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- 01 Jan 1987
Abstract
The present day importance to both science and industry of resistance thermometers and thermocouples utilising the electrical and thermoelectrical properties of the platinum metals is so well known that it has tended to overshadow the use of these metals for crucial components in gas pyrometers. For perhaps one hundred and fifty years gas thermometers, mostly incorporating noble metal bulbs, have provided a most accurate means of determining high temperatures. This article gives a selective account of early developments in temperature measurement involving gas thermometry and the platinum metals, one result of which was the adoption of the first internationally recognised standard scale of temperatures, in October 1887.
© Johnson Matthey