Part Name (What is it called)

[PPC800]

I need help finding this part, I don't know what its called,
but I can describe it:

Part checks air in a line, If there is Air in the Line,
Output=1 else 0.
Voltage to be tied from external power supply.


Would digikey or a similar supplier have something like this?

THANKS

 

[davidbeach]

Pressure switch?

 

[ScottyUK]

Or perhaps a vacuum switch?

What do you mean by 'air in the line'? Atmospheric air? 8 Bar service air? 3000 psi bottled air? Help us out a little!


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If we learn from our mistakes I'm getting a great education!

 

[PPC800]

A link to the part from digikey or any other mfg. would be greatly appreciated!

By air I mean instrumentation air, 35 psi.

I'm thinking a simple tube with a mechanical contact that closes when air flows through from one direction.

Here's a drawing..lol

________________________

Switch -> \
\ <---AIR
____|-|_______\_________

Contact point

 

[PeterKsiazek]

So really, what you are trying to determine is if air is flowing through a hose or not, right?

 

[dpc]

Does it matter which direction the air is flowing?

"The more the universe seems comprehensible, the more it also seems pointless." -- Steven Weinberg

 

[geekEE]

It's unclear from your description whether you're looking for a flow sensor or a pressure sensor. Here are links to Digikey for both

flow sensors

http://search.digikey.com/scripts/DkSearch/dksus.dll?Cat=1966503

pressure sensors

http://search.digikey.com/scripts/DkSearch/dksus.dll?Cat=1966259

Glenn