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Pressure Transducer Sought — Parallax Forums

Pressure Transducer Sought

ArchiverArchiver Posts: 46,084
edited 2001-12-12 02:04 in General Discussion
Can anyone recommend an inexpensive and readily available pressure
transducer for use in an automotive application. Ideally, it would
measure vacuum to about 25hg and pressure to about 30psi, with +/- 2%
precision or so, and produce a linear 0-5 volt dc output. I want to
use it with a Basic Stamp to measure vacuum and boost on a turbo
charged car. The vacuum reading is not as important as the pressure
reading, if there is a handy pressure only sensor out there. Thanks
in advance.

Comments

  • ArchiverArchiver Posts: 46,084
    edited 2001-12-11 04:36
    Try http://rswww.com - a UK company. Search for "pressure transducer". You
    will need to register to see the tech info. The equipment is not cheap tho,
    it is designed for factories.

    Tony
    Original Message
    From: "tomatlarge" <tomatlarge@y...>
    To: <basicstamps@yahoogroups.com>
    Sent: Monday, December 10, 2001 11:37 PM
    Subject: [noparse][[/noparse]basicstamps] Pressure Transducer Sought


    > Can anyone recommend an inexpensive and readily available pressure
    > transducer for use in an automotive application. Ideally, it would
    > measure vacuum to about 25hg and pressure to about 30psi, with +/- 2%
    > precision or so, and produce a linear 0-5 volt dc output. I want to
    > use it with a Basic Stamp to measure vacuum and boost on a turbo
    > charged car. The vacuum reading is not as important as the pressure
    > reading, if there is a handy pressure only sensor out there. Thanks
    > in advance.
    >
    >
    > To UNSUBSCRIBE, just send mail to:
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    Body of the message will be ignored.
    >
    >
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    >
    >
    >
  • ArchiverArchiver Posts: 46,084
    edited 2001-12-11 04:43
    THE EASY WAY IS TO FIND A USED MAP SENSOR FROM A TURBO CAR IN THE JUNK YARD.
    JOHN

    "tomatlarge" <tomatlarge@y...> wrote:

    >Can anyone recommend an inexpensive and readily available pressure
    >transducer for use in an automotive application. Ideally, it would
    >measure vacuum to about 25hg and pressure to about 30psi, with +/- 2%
    >precision or so, and produce a linear 0-5 volt dc output. I want to
    >use it with a Basic Stamp to measure vacuum and boost on a turbo
    >charged car. The vacuum reading is not as important as the pressure
    >reading, if there is a handy pressure only sensor out there. Thanks
    >in advance.
    >
    >
    >To UNSUBSCRIBE, just send mail to:
    > basicstamps-unsubscribe@yahoogroups.com
    >from the same email address that you subscribed. Text in the Subject and Body
    of the message will be ignored.
    >
    >
    >Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
    >
    >
    >
  • ArchiverArchiver Posts: 46,084
    edited 2001-12-11 05:07
    Try Honeywell-Micoswitch @ 1-800-537-6945 or search the web. I've been using
    the 140PC series of pressure
    sensors. They're available as absolute, differential, gage, vacuum
    gage/amplified. Very easy to implement with
    an LTC1298 ADC. Cost varies, you may try Mouser, Newark or sometimes on E-bay.

    Regards,

    Ben

    tomatlarge wrote:

    > Can anyone recommend an inexpensive and readily available pressure
    > transducer for use in an automotive application. Ideally, it would
    > measure vacuum to about 25hg and pressure to about 30psi, with +/- 2%
    > precision or so, and produce a linear 0-5 volt dc output. I want to
    > use it with a Basic Stamp to measure vacuum and boost on a turbo
    > charged car. The vacuum reading is not as important as the pressure
    > reading, if there is a handy pressure only sensor out there. Thanks
    > in advance.
    >
    > To UNSUBSCRIBE, just send mail to:
    > basicstamps-unsubscribe@yahoogroups.com
    > from the same email address that you subscribed. Text in the Subject and Body
    of the message will be ignored.
    >
    >
    > Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
  • ArchiverArchiver Posts: 46,084
    edited 2001-12-11 07:58
    Motorola (http://www.mot.com) has a series of pressure sensors with a
    nominal 0 to 5 VDC output. One that comes to mind is the MPX5700.
    However, there are many in the range from 1.5 to 150.

    I have found Newark (http://www.newark.com) to be a good source.

    Peter H Anderson, http://www.phanderson.com



    --- In basicstamps@y..., "tomatlarge" <tomatlarge@y...> wrote:
    > Can anyone recommend an inexpensive and readily available pressure
    > transducer for use in an automotive application. Ideally, it would
    > measure vacuum to about 25hg and pressure to about 30psi, with +/-
    2%
    > precision or so, and produce a linear 0-5 volt dc output. I want to
    > use it with a Basic Stamp to measure vacuum and boost on a turbo
    > charged car. The vacuum reading is not as important as the pressure
    > reading, if there is a handy pressure only sensor out there. Thanks
    > in advance.
  • ArchiverArchiver Posts: 46,084
    edited 2001-12-11 14:19
    I have used the Motorola MPX5700's, and they are simple to use. They output
    0-5V across the full scale range, less a small offset. These are small
    micromachined parts in plastic molded packages. They are intended for use
    with clean air or water, and there are models that range up to 100 psig or
    so. Forget about trying to get an absolute model number - it seems only the
    gauge types are stocked. They are on the shelf at Allied Electronics.
    Motorola has a nice selection brochure on their web site also.
    I don't know how well the plastic barb pressure inlet will do with high
    temperatures though. If you want a $20 solution, it may be worth working out
    a way to keep it cool.
    I'm not sure if these devices will handle vacuum, of if so how.
    Chris
    >
    >
    > Can anyone recommend an inexpensive and readily available pressure
    > transducer for use in an automotive application. Ideally, it would
    > measure vacuum to about 25hg and pressure to about 30psi, with +/- 2%
    > precision or so, and produce a linear 0-5 volt dc output. I want to
    > use it with a Basic Stamp to measure vacuum and boost on a turbo
    > charged car. The vacuum reading is not as important as the pressure
    > reading, if there is a handy pressure only sensor out there. Thanks
    > in advance.
  • ArchiverArchiver Posts: 46,084
    edited 2001-12-12 02:04
    Yet another response:

    Motorola actually makes a pressure sensor specifically designed to measure
    manifold pressure (MAP). The MPX4115A series works from 2.2 (vaccum) to 16.7
    (just above ambient pressure). The key feature is that it is temperature
    compensated and works from -4 to +125 deg C. It has built-in signal
    conditioning and outputs 0.2 to 4.8 volts DC. Check out
    http://e-www.motorola.com/brdata/PDFDB/docs/MPX4115A.pdf

    Tim






    In a message dated 12/10/01 4:39:35 PM, tomatlarge@y... writes:

    << Can anyone recommend an inexpensive and readily available pressure
    transducer for use in an automotive application. Ideally, it would
    measure vacuum to about 25hg and pressure to about 30psi, with +/- 2%
    precision or so, and produce a linear 0-5 volt dc output. I want to
    use it with a Basic Stamp to measure vacuum and boost on a turbo
    charged car. The vacuum reading is not as important as the pressure
    reading, if there is a handy pressure only sensor out there. Thanks
    in advance. >>
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