Piranin.

Brit.

/pᵻˈrɑːni/, U.S.

/pəˈrɑni/

Origin: From a proper name. Etymon: proper name Pirani.

Etymology: < the name of Marcello Stefano von Pirani (1880–1968), German physicist, who invented the gauge (described by him in Verhandl. der Deutschen Physikalischen Ges. (1906) 8 686).

Physics.

attributive. Designating a gauge which measures very low pressures by utilizing the cooling effect of the gas on a heated metal filament whose resistance is sensitive to temperature. Chiefly in Pirani gauge.

ΘΚΠ

the world > matter > physics > mechanics > force > [noun] > pressure > fluid pressure > measuring instruments

air gauge1787

piezometer1820

gas gauge1836

pressure gauge1836

thermometer-gauge1841

kymograph1855

telemanometer1884

tensimeter1907

isoteniscope1910

Pirani gauge1911

Knudsen gauge1918

Knudsen manometer1961

1911 Trans. Amer. Electrochem. Soc. 20 245 In simplicity both of construction and of operation, involving only current and resistance measurements within the range of instruments readily accessible, the Pirani manometer recommends itself at once.

1921 Proc. Physical Soc. 33 293 For many purposes we think that the Pirani gauge..would have considerable advantages over the McLeod.

1962 F. I. Ordway et al. Basic Astronautics v. 200 Pirani, alphatron, and bellows gauges are regularly employed in rockets to obtain atmospheric pressures.

1989 R. Dryer & G. Lata Exper. Biochem. i. ix. 210 McLeod gauges are sometimes replaced by Pirani gauges.

This entry has been updated (OED Third Edition, June 2006; most recently modified version published online March 2022).

单词	pirani
释义	Piranin. Brit. /pᵻˈrɑːni/, U.S. /pəˈrɑni/ Origin: From a proper name. Etymon: proper name Pirani. Etymology: < the name of Marcello Stefano von Pirani (1880–1968), German physicist, who invented the gauge (described by him in Verhandl. der Deutschen Physikalischen Ges. (1906) 8 686). Physics. attributive. Designating a gauge which measures very low pressures by utilizing the cooling effect of the gas on a heated metal filament whose resistance is sensitive to temperature. Chiefly in Pirani gauge. ΘΚΠ the world > matter > physics > mechanics > force > [noun] > pressure > fluid pressure > measuring instruments air gauge1787 piezometer1820 gas gauge1836 pressure gauge1836 thermometer-gauge1841 kymograph1855 telemanometer1884 tensimeter1907 isoteniscope1910 Pirani gauge1911 Knudsen gauge1918 Knudsen manometer1961 1911 Trans. Amer. Electrochem. Soc. 20 245 In simplicity both of construction and of operation, involving only current and resistance measurements within the range of instruments readily accessible, the Pirani manometer recommends itself at once. 1921 Proc. Physical Soc. 33 293 For many purposes we think that the Pirani gauge..would have considerable advantages over the McLeod. 1962 F. I. Ordway et al. Basic Astronautics v. 200 Pirani, alphatron, and bellows gauges are regularly employed in rockets to obtain atmospheric pressures. 1989 R. Dryer & G. Lata Exper. Biochem. i. ix. 210 McLeod gauges are sometimes replaced by Pirani gauges. This entry has been updated (OED Third Edition, June 2006; most recently modified version published online March 2022). < n.1911
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