What does the symbol Ne stand for in the unit "Ne/min"?  The unit was
found on a website regarding suction pressure.

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Request for Question Clarification by andrewxmp-ga on 30 Jul 2003 15:04 PDT

Can you please post a link to the website with this notation?

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Request for Question Clarification by haversian-ga on 30 Jul 2003 17:56 PDT

A unit per minute doesn't sound like pressure.  Pressure is force
divided by area, so unless your symbol "Ne" has units force*time/area,
"Ne/min" is not pressure.  The force * time part is easy, that's work.
 But work per area?  That sounds a bit off.

Some more information might help clarify.  Posting the website you saw
this mentioned on would definately help.

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Clarification of Question by secor77-ga on 30 Jul 2003 18:38 PDT

Here is an example of a website with the unit.

http://www.tiancherng.com.tw/english/product1-1.html

Check out product TC-09L at the bottum of the page.  In the Pneumatic section.

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Clarification of Question by secor77-ga on 30 Jul 2003 19:06 PDT

I have seen this unit in another catalog for Vacuum evacuators.  It
was a pdf and I can't find it now.

I wonder if this could stand for "number (of) engagements per minute."

Without any context, this is just guesswork.

Given that that website seems to be the only reference to Ne/min out
there, and it's on the English page of an otherwise Taiwanese website,
I wonder if it's a translation error.

-K~

My best guess is that it is a translation error or a result of not
understanding physics.

Higher up on the page, air pressure is quoted in kg/cm^2.  Pressure is
force/area, and a kilogram is not a unit of force, but rather of mass.
 This calls into question the other units quoted on the page.

An alternate theory that I investigated but came up dry on is that it
is not a unit of pressure at all, but rather a rate.  I can't figure
out what 'em' refers to, but assuming the page is using 'kg' rather
than 'N' (newton), the two numbers quoted under "pneumatic" likely
refer to a maximum pressure and a maximum evacuation rate.  That is,
the machine can sustain a pressure down to so many Torr, and can move
air at a rate of 150 Ne (same volume unit?) per minute.