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more info for Prox sensor — Parallax Forums

more info for Prox sensor

ArchiverArchiver Posts: 46,084
edited 2001-07-06 03:26 in General Discussion
more information...
The sensor will be potted in a tube and inserted into the silo from the
outside. All electrical connections will be outside the silo or potted in
the senor.

Original Message
From: "Rodent" <daweasel@s...>
To: <basicstamps@yahoogroups.com>
Sent: Friday, July 06, 2001 10:02 AM
Subject: Re: [noparse][[/noparse]basicstamps] Prox sensor


> Some sort of optic sensor be the ticket, although it would have to be
sealed
> as the fertilizer would corode any exposed connections. A flap with a
> microswitch would work also, but it would have to be sealed also. I don't
> recall seeing an off-the-shelf sensor for this, but I'm sure some of the
> industrial / batch people may know of one.
>
>
Original Message
>
> > I am looking for a circuit that will be suitable to detect the
> presence of a granular fertilizer in a storage silo. Just need a go/no-go
> type output eg whether the sensor is covered or not.
> >
> > Anyone got a suitable circuit?
>
>
>
>
>
> 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.
>
>
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>
>

Comments

  • ArchiverArchiver Posts: 46,084
    edited 2001-07-06 02:54
    Is the fertilizer of a color or consistency that would reflect light? If so,
    an optical proximity sensor may work.
    Original Message

    > The sensor will be potted in a tube and inserted into the silo from the
    > outside. All electrical connections will be outside the silo or potted in
    > the senor.

    > > Some sort of optic sensor be the ticket, although it would have to be
    > sealed
    > > as the fertilizer would corode any exposed connections. A flap with a
    > > microswitch would work also, but it would have to be sealed also. I
    don't
    > > recall seeing an off-the-shelf sensor for this, but I'm sure some of the
    > > industrial / batch people may know of one.
    > >
    > >
    Original Message
    > >
    > > > I am looking for a circuit that will be suitable to detect the
    > > presence of a granular fertilizer in a storage silo. Just need a
    go/no-go
    > > type output eg whether the sensor is covered or not.
    > > >
    > > > Anyone got a suitable circuit?
  • ArchiverArchiver Posts: 46,084
    edited 2001-07-06 03:13
    Too dusty for optical sensor, needs to be capacitive (or inductive?)
    Original Message
    From: "Rodent" <daweasel@s...>
    To: <basicstamps@yahoogroups.com>
    Sent: Friday, July 06, 2001 11:24 AM
    Subject: Re: [noparse][[/noparse]basicstamps] more info for Prox sensor


    > Is the fertilizer of a color or consistency that would reflect light? If
    so,
    > an optical proximity sensor may work.
    >
    >
    Original Message
    >
    > > The sensor will be potted in a tube and inserted into the silo from the
    > > outside. All electrical connections will be outside the silo or potted
    in
    > > the senor.
    >
    > > > Some sort of optic sensor be the ticket, although it would have to be
    > > sealed
    > > > as the fertilizer would corode any exposed connections. A flap with a
    > > > microswitch would work also, but it would have to be sealed also. I
    > don't
    > > > recall seeing an off-the-shelf sensor for this, but I'm sure some of
    the
    > > > industrial / batch people may know of one.
    > > >
    > > >
    Original Message
    > > >
    > > > > I am looking for a circuit that will be suitable to detect the
    > > > presence of a granular fertilizer in a storage silo. Just need a
    > go/no-go
    > > > type output eg whether the sensor is covered or not.
    > > > >
    > > > > Anyone got a suitable circuit?
    >
    >
    >
    >
    > 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 2001-07-06 03:26
    You could go with a spring-loaded flap / magnet actuating a reed switch or
    hall-effect sensor.
    Original Message

    > Too dusty for optical sensor, needs to be capacitive (or inductive?)

    > > Is the fertilizer of a color or consistency that would reflect light? If
    > so,
    > > an optical proximity sensor may work.
    > >
    > >
    Original Message
    > >
    > > > The sensor will be potted in a tube and inserted into the silo from
    the
    > > > outside. All electrical connections will be outside the silo or potted
    > in
    > > > the senor.
    > >
    > > > > Some sort of optic sensor be the ticket, although it would have to
    be
    > > > sealed
    > > > > as the fertilizer would corode any exposed connections. A flap with
    a
    > > > > microswitch would work also, but it would have to be sealed also. I
    > > don't
    > > > > recall seeing an off-the-shelf sensor for this, but I'm sure some of
    > the
    > > > > industrial / batch people may know of one.
    > > > >
    > > > >
    Original Message
    > > > >
    > > > > > I am looking for a circuit that will be suitable to detect the
    > > > > presence of a granular fertilizer in a storage silo. Just need a
    > > go/no-go
    > > > > type output eg whether the sensor is covered or not.
    > > > > >
    > > > > > Anyone got a suitable circuit?
    > >
    > >
    > >
    > >
    > > 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/
    > >
    > >
    >
    >
    > 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/
    >
    >
    >
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