Difference between revisions of "Pressure Sensor Technologies"

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Intro: Pressure sensing technology that we use in the lab mostly revolves around ionic and thermal applications of gas properties. Ion and thermal couple gauges respectively.
 
  
Ion Gauges: A filament is charged and produces free electrons. These electrons roam free in the low pressure system until they bombard a gas atom. This bombardment knocks off an electron from the gas atom, creating a cation. This cation is attracted to a collector which completes a circuit between the filament and the collector. This current is measured and is directly related to the density of the remaining gas and subsequently, its pressure.
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== The Thermocouple Gauge ==
  
[[File:iongauge.jpg]]
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[[File:Tc_gauge.png|600px]]
  
Thermocouple Gauge (TCG): A heated filament is placed into the low pressure system and allowed to cool. The rate of heat loss is directly related to gas density and subsequently, pressure.
 
  
[[File:TCG.gif]]
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== The Ion Gauge ==
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[[File:Ion_gauge.png|600px]]
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== The Capacitance Gauge ==
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[[File:Capacitance_gauge.png|600px]]
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'''Useful Links:'''
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[http://en.wikipedia.org/wiki/Ultra-high_vacuum| UHV - Wikipedia]

Latest revision as of 12:51, 7 November 2014

The Thermocouple Gauge

Tc gauge.png


The Ion Gauge

Ion gauge.png


The Capacitance Gauge

Capacitance gauge.png

Useful Links:

UHV - Wikipedia