Parameter Daily He Usage (L) Day 1 - Original He carrier gas run


He Cylinder Life (days) Daily N2 Usage (L)


Day 2 – First He carrier gas run after overnight N2 Sleep.M method


N2 Cylinder Life (days) Yearly He Cost ($)


Day 3 – After using overnight N2 standby method Yearly N2 Cost ($) Yearly Total Gas Cost ($) 14 16 18 20 22 24 Min.


No conservation 112 71 0 0


$1,537 $0


$1,537


Helium conservation 21


376 24


340


$292 $64


$356


Nitrogen Background 5000000 500000 50000 5000 0 5 10 Time (min) email: 186ad@reply-direct.com 15 20


5 mL/min He 2 mL/min He


Counts


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