how can i measure vaccum electronically?

M

max_imum2000

New Member

• May 13, 2006

• #1

is there any kind of sensor avilable for measuring vaccum ?
please provide any link if possible
thanks

 

D

docel

Banned

• May 13, 2006

• #2

Basically, any pressure sensor will do. You have a vaccum sensor in a car, too.

 

Nigel Goodwin

Super Moderator

Most Helpful Member

• May 13, 2006

• #3

max_imum2000 said:

is there any kind of sensor avilable for measuring vaccum ?
please provide any link if possible
thanks

Click to expand...

I suggest you check car electronics, vacuum gauges are sometimes used in cars - they used to be mechanical gauges years ago, but I imagine modern ones are electronic?.

EDIT: great minds think alike, and at the same time too

 

philba

New Member

• May 13, 2006

• #4

check out freescale. they make a number of pressure sensors.

 

DirtyLude

Well-Known Member

• May 13, 2006

• #5

Only some cars have MAP Manifold Absolute Pressure sensors. Actually I don't think many new cars have them, since MAF sensors are more environmentally friendly. I can't think of any car in the last few years that still uses a MAP.

Just search for 'pressure sensor' on Digikey and put in your requirements.

 

Oznog

Active Member

• May 14, 2006

• #6

Lots of surplus places have transducers (sensors) for measuring pressure. You probably want a differential (gauge) pressure sensor rather than an absolute one. Since ambient pressure varies with altitude and atmospheric conditions, sometimes 0.25 psi less than standard sea level pressure is a vacuum and sometimes it's not.

 

The Mad Professor

New Member

• May 14, 2006

• #7

For the most part vacuum gauges are mechanical in nature a good overview can be found here at this homebrew laser page...

http://www.repairfaq.org/sam/lasercva.htm

Electronic - Bead Thermistor - slow response but will measure in milli TOR range - thanks to Ray Schmaus for this one

**broken link removed**

 

D

docel

Banned

• May 14, 2006

• #8

...and then you have the Electronic Blood pressure monitor: always has a pressure sensor! Lots of them get thrown away!!

 

ClydeCrashKop

Well-Known Member

Most Helpful Member

• May 14, 2006

• #9

Fuel injected Chevy engines use a map sensor and many others. Car parts stores and junk yards have them. 3 terminals: +12v, ground with variable voltage output.

 

ClydeCrashKop

Well-Known Member

Most Helpful Member

• May 14, 2006

• #10

Correction: +5v, V out, ground
NAPA part # 2-1961 is a big older one for $95.00. The newer ones from late ‘90s are smaller and mounted right on the intake manifold. Try the junk yard.