barometric pressure sensor...
Rainman
pressure sensors. I am looking for a bare bones pressure sensor, not a
sensor unit with readout and whatever.. ideally just a simple
component. I'm going to make my own microprocessor based interface to
it.
Thanks in advance...
Rainman
rai...@com.connection <-- you know what to do... :)
pti...@yahoo.com
> Can anyone guide me to one or even a few manufacturers of barometric
> pressure sensors. I am looking for a bare bones pressure sensor, not a
> sensor unit with readout and whatever.. ideally just a simple
> component. I'm going to make my own microprocessor based interface to
> it.
Try SenSym ( http://www.sensym.com ). They make a few lines of very nice
"Solid State Pressue Sensors" which are basically little bridges that put out
a differential voltage based on pressure. Their handbook has good apps notes
that cover such things as making a barometer.
I am fairly sure Motorola makes these things as well, but I have only used the
Sensym parts in the past.
Actually I think I have some in my basement (still in packaging, unused) if
you are interested. I forget which part exactly but they are from the "SDX"
series. I could find them and give you the part number. Email me if you are
interested in them.
--
Patrick Timlin --- http://www.geocities.com/CapeCanaveral/4742/
pti...@yahoo.com
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-Bodnar,B.L.
Craig Gibson <gib...@vodacom.co.za> wrote:
>On Tue, 20 Oct 1998 05:11:59 -0400, Rainman <no...@m.com> wrote:
>
>>Can anyone guide me to one or even a few manufacturers of barometric
>>pressure sensors. I am looking for a bare bones pressure sensor, not a
>>sensor unit with readout and whatever.. ideally just a simple
>>component. I'm going to make my own microprocessor based interface to
>>it.
>>
>>Rainman
>>rai...@com.connection <-- you know what to do... :)
>>
>
>sensors for pressure measurement and I was really surprised at the
>price! There is also a application note for a barometer somewhere
>there.
>If you cant find it let me know and I'll email you the PDF's
>
>Are you building a weather station too? - Nice project, what processor
>are you going to use?
>
>Regards
>Craig Gibson
If you feel like using automotive gear, go to any auto parts store and
purchase a manifold absolute pressure (MAP) sensor. GM and Chrysler sensors
put out a voltage directly proportional to pressure, whereas Ford sensors put
out a 50% duty cycle pulse directly proportional to pressure. Someplace at
home I have an equation relating pressure vs. frequency for the Ford MAP
sensor. The connection is trivial: ground, +5 volts, signal output.
Regards,
Bohdan Bodnar
bbo...@lucent.com
Jon Bryan
> Rainman <no...@m.com> wrote:
> > Can anyone guide me to one or even a few manufacturers of barometric
> > pressure sensors. I am looking for a bare bones pressure sensor, not a
> > sensor unit with readout and whatever.. ideally just a simple
> > component. I'm going to make my own microprocessor based interface to
> > it.
>
> "Solid State Pressue Sensors" which are basically little bridges that put out
> a differential voltage based on pressure. Their handbook has good apps notes
> that cover such things as making a barometer.
I'll second that. It's been five years since I used them, but the Sensym
pressure sensors worked very well for me. Not expensive, very accurate,
excellent temperature compensation and very low drift.
> I am fairly sure Motorola makes these things as well, but I have only used the
> Sensym parts in the past.
I hope that Motorola has improved their sensors in the last few years. I
had much better luck with the Sensym parts. The project I built them
into required both the absolute and gage types.
--
Jon Bryan <=> jrb...@sandia.gov
Sandia National Laboratories
Intelligent System Sensors and Controls
am018
the data sheet they seem orientated to this app. -- incidently a couple of
Briish electronic magazines have publishe project schematics for
barometers/altimeters i the last couple of months.
-Bodnar,B.L. wrote:
> In article <36253ca3...@news.icon.co.za>,
> Craig Gibson <gib...@vodacom.co.za> wrote:
> >On Tue, 20 Oct 1998 05:11:59 -0400, Rainman <no...@m.com> wrote:
> >
> >>Can anyone guide me to one or even a few manufacturers of barometric
> >>pressure sensors. I am looking for a bare bones pressure sensor, not a
> >>sensor unit with readout and whatever.. ideally just a simple
> >>component. I'm going to make my own microprocessor based interface to
> >>it.
Bojan
About the pressure sensors, if you want a complete unit that gives
unamplified and amplified outputs (voltage and current) try this site:
http://www.sensotec.com , hope it helps someone.
francis...@usa.net
A few years ago, MOTOROLA used to have pressure sensors.
--
mailto:francisc...@usa.net
(remove "xxx" to answer, please)
Lew Little
Systems. We make the GM Sensor. For this project our sensor would be
extremely easy to use and is obtainable from any GM Parts Dealer. It
requires a supple of 5.0 VDC +/- 0.1. The output is proportional to
pressure and ratiometric to the supply the equation is as follows for
most models
Vout = Supply*(Pressure * 0.01059 - 0.10941)
whre supply = 5.00 VDC +/- 0.1 VDC
Pressure is in KPa
Pressure Range is 15 to 102 KPa.
The technology is a micormachined silicon element which we fab here.
The signal is amplified and temperature compensated through an ASIC that
we also fab here. We do not use anything from Motorola and I think that
our sensor are more accurate over a wide temperature.
Accuacy +/- 1.2%, Temperature -40 to 125 deg C.
I think that this would be better than the Ford frequency based system.
am018 wrote:
>
> I suspect the Motorola MPX sensors are the basis of the automotive type as from
> the data sheet they seem orientated to this app. -- incidently a couple of
> Briish electronic magazines have publishe project schematics for
> barometers/altimeters i the last couple of months.
>
> -Bodnar,B.L. wrote:
>
> > In article <36253ca3...@news.icon.co.za>,
> > Craig Gibson <gib...@vodacom.co.za> wrote:
> > >On Tue, 20 Oct 1998 05:11:59 -0400, Rainman <no...@m.com> wrote:
> > >
> > >>Can anyone guide me to one or even a few manufacturers of barometric
> > >>pressure sensors. I am looking for a bare bones pressure sensor, not a
> > >>sensor unit with readout and whatever.. ideally just a simple
> > >>component. I'm going to make my own microprocessor based interface to
> > >>it.
> > >>Thanks in advance...
> > >>
> > >>Rainman
> > >>rai...@com.connection <-- you know what to do... :)
> > >>
> > >
> > >Go to www.mot-sps.com/senseon. Motorola Senseon has some really nice
> > >sensors for pressure measurement and I was really surprised at the
> > >price! There is also a application note for a barometer somewhere
> > >there.
> > >If you cant find it let me know and I'll email you the PDF's
> > >
> > >Are you building a weather station too? - Nice project, what processor
> > >are you going to use?
> > >
> > >Regards
> > >Craig Gibson
> >
> > If you feel like using automotive gear, go to any auto parts store and
> > purchase a manifold absolute pressure (MAP) sensor. GM and Chrysler sensors
> > put out a voltage directly proportional to pressure, whereas Ford sensors put
> > out a 50% duty cycle pulse directly proportional to pressure. Someplace at
> > home I have an equation relating pressure vs. frequency for the Ford MAP
> > sensor. The connection is trivial: ground, +5 volts, signal output.
> >
> > Regards,
> >
> > Bohdan Bodnar
> > bbo...@lucent.com
--
Lew Little Delphi - Delco Electronic Systems
Electrical Design Engineer One Corporate Center
Pressure Sensor Development PO Box 9005 M.S. 8186
Phone: 765-451-1989 Kokomo, IN 46904
FAX: 765-451-1728
Internet Address: lhli...@mail.delcoelect.com