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The Pirani gauge is a robust thermal conductivity gauge used for the measurement of the pressures in vacuum systems. [1] It was invented in 1906 by Marcello Pirani. [2] Marcello Stefano Pirani was a German physicist working for Siemens & Halske which was involved in the vacuum lamp industry.
Penning vacuum gauge (cut-away) There are two subtypes of cold-cathode ionization gauges: the Penning gauge (invented by Frans Michel Penning), and the inverted magnetron, also called a Redhead gauge. The major difference between the two is the position of the anode with respect to the cathode.
This page was last edited on 14 June 2011, at 20:07 (UTC).; Text is available under the Creative Commons Attribution-ShareAlike 4.0 License; additional terms may ...
McLeod gauge; P. Penning gauge; Pirani gauge; R. Residual gas analyzer This page was last edited on 2 December 2019, at 04:47 (UTC). Text is available under the ...
CBS News contributor David Begnaud shows how three teens at a high school in Iowa jumped into action to help save a man they saw struggling after he fell on train tracks.
However, from 2018 to 2019, when the steel and aluminum tariffs were active, Ford and General Motors reported losses of $1 billion each — $700 for each car produced during that time.
A McLeod gauge is a scientific instrument used to measure very low pressures, down to 10 −6 Torr (0.133 mPa). It was invented in 1874 by Herbert McLeod (1841–1923). [ 1 ] McLeod gauges were once commonly found attached to equipment that operates under vacuum , such as a lyophilizer .
Pennsylvania’s Punxsutawney Phil might be the most well-known weather-predicting groundhog, but a new list casts doubt on his accuracy. Phil did so poorly that even nonliving critters outshine ...