Gas flow sensor.
Hi all,
A little off topic, I know but....
I'm in need of a gas flow sensor capable of measuring about 10 to 30 litres
per minute of argon that can be interfaced to a Stamp or Pic. 0-10V, 4-20mA,
Frequency, PWM, whatever.
Anyone have any ideas?
Thanks alot!
/Henrik Olsson. Sweden.
A little off topic, I know but....
I'm in need of a gas flow sensor capable of measuring about 10 to 30 litres
per minute of argon that can be interfaced to a Stamp or Pic. 0-10V, 4-20mA,
Frequency, PWM, whatever.
Anyone have any ideas?
Thanks alot!
/Henrik Olsson. Sweden.
Comments
from weber sensors inc measures air or gaseous media.
web url www.captor.com
email info@c...
this sensor was in nuts & volts april 2001 issue, i havent looked at it
myself other than the ad.
norm
>From: "Henrik Olsson" <henrik-olsson@t...>
>Reply-To: basicstamps@yahoogroups.com
>To: <basicstamps@yahoogroups.com>
>Subject: [noparse][[/noparse]basicstamps] Gas flow sensor.
>Date: Mon, 7 Jan 2002 20:57:34 +0100
>
>Hi all,
>A little off topic, I know but....
>I'm in need of a gas flow sensor capable of measuring about 10 to 30 litres
>per minute of argon that can be interfaced to a Stamp or Pic. 0-10V,
>4-20mA,
>Frequency, PWM, whatever.
>Anyone have any ideas?
>Thanks alot!
> /Henrik Olsson. Sweden.
>
>
>
>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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>
>
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>Hi all,
>A little off topic, I know but....
>I'm in need of a gas flow sensor capable of measuring about 10 to 30 litres
>per minute of argon that can be interfaced to a Stamp or Pic. 0-10V, 4-20mA,
>Frequency, PWM, whatever.
>Anyone have any ideas?
>Thanks alot!
> /Henrik Olsson. Sweden.
I don't know if this will give you any Ideas or not...
Note: This will not work for liquid gases
Several years ago (10+) I helped a friend of mine design a "gasflow generator"
with no moving parts. This was basically setup like a transformer. A torrid
coil for the primary (pulsed DC at about 15kHz) and the gas intake. The
secondary
coil was arranged similar to that of a solenoid with the gas flow through the
center of the coil and allowed to escape at the other end. The primary to
secondary
ratio was about 1:5. Voltage and Frequency measured at the secondary was
proportional to the rate of gas flow.
Beau Schwabe Mask Designer IV - ATL
National Semiconductor Wired Communications Division
500 Pinnacle Court, Suite 525 Mail Stop GA1 Norcross, GA 30071
different rate upstream vs
downstream. This site has products and an equation that might be useful. I
have seen ultrasonic xmtr/receiver
pairs in hobbiest catalogs, so they are not exotic.
http://www.ultraranger.com/default.htm
Best, Michael
Henrik Olsson wrote:
> Hi all,
> A little off topic, I know but....
> I'm in need of a gas flow sensor capable of measuring about 10 to 30 litres
> per minute of argon that can be interfaced to a Stamp or Pic. 0-10V, 4-20mA,
> Frequency, PWM, whatever.
> Anyone have any ideas?
> Thanks alot!
> /Henrik Olsson. Sweden.
>
> 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/
> Hi all,
> A little off topic, I know but....
> I'm in need of a gas flow sensor capable of measuring about 10 to
30 litres
> per minute of argon that can be interfaced to a Stamp or Pic. 0-
10V, 4-20mA,
> Frequency, PWM, whatever.
> Anyone have any ideas?
> Thanks alot!
> /Henrik Olsson. Sweden.
Hi,
I'm currently working on such a device for use in engine testing. If
you need a start simply look for a small hotwire module being used in
an automotive fuel injection application.
The hotwires are typically temperature compensated and many output
frequency as a signal. Some frequency will be zero flow and then it
will increase as flow increases. The stamp math you decide to use
will determine the gas flow accuracy and linearity, provided that you
use a novel way to correlate the flow to an actual real volume/time
number.
If you need more help than this contact me at ronaldsa@e...
Ron
Thanks
-Nick
Original Message
From: "wizard_80538" <ronaldsa@e...>
To: <basicstamps@yahoogroups.com>
Sent: Monday, January 07, 2002 6:58 PM
Subject: [noparse][[/noparse]basicstamps] Re: Gas flow sensor.
> --- In basicstamps@y..., "Henrik Olsson" <henrik-olsson@t...> wrote:
> > Hi all,
> > A little off topic, I know but....
> > I'm in need of a gas flow sensor capable of measuring about 10 to
> 30 litres
> > per minute of argon that can be interfaced to a Stamp or Pic. 0-
> 10V, 4-20mA,
> > Frequency, PWM, whatever.
> > Anyone have any ideas?
> > Thanks alot!
> > /Henrik Olsson. Sweden.
>
>
> Hi,
>
> I'm currently working on such a device for use in engine testing. If
> you need a start simply look for a small hotwire module being used in
> an automotive fuel injection application.
>
> The hotwires are typically temperature compensated and many output
> frequency as a signal. Some frequency will be zero flow and then it
> will increase as flow increases. The stamp math you decide to use
> will determine the gas flow accuracy and linearity, provided that you
> use a novel way to correlate the flow to an actual real volume/time
> number.
>
> If you need more help than this contact me at ronaldsa@e...
>
> Ron
>
>
> 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/
>
>
_________________________________________________________
Do You Yahoo!?
Get your free @yahoo.com address at http://mail.yahoo.com
connected to 15khz pulsed source. A secondary coil like a solenoid and the
volume of gas passing through the center of the solenoid can be measured by
variation in frequency and amplitude. I am puzzled about the configuration
description and the Physics about how this works. Measuring gas flow is not
my field of knowledge but I would appreciate it if you would explain it to
me or point me to some references that I may study on-line.
Thanks, Steve
Original Message
From: "Beau Schwabe" <bschwabe@a...>
To: <basicstamps@yahoogroups.com>
Sent: Monday, January 07, 2002 12:58 PM
Subject: Re: [noparse][[/noparse]basicstamps] Gas flow sensor.
> At 08:57 PM 1/7/02 +0100, you wrote:
> >Hi all,
> >A little off topic, I know but....
> >I'm in need of a gas flow sensor capable of measuring about 10 to 30
litres
> >per minute of argon that can be interfaced to a Stamp or Pic. 0-10V,
4-20mA,
> >Frequency, PWM, whatever.
> >Anyone have any ideas?
> >Thanks alot!
> > /Henrik Olsson. Sweden.
>
> I don't know if this will give you any Ideas or not...
>
> Note: This will not work for liquid gases
>
> Several years ago (10+) I helped a friend of mine design a "gasflow
generator"
> with no moving parts. This was basically setup like a transformer. A
torrid
> coil for the primary (pulsed DC at about 15kHz) and the gas intake. The
> secondary
> coil was arranged similar to that of a solenoid with the gas flow through
the
> center of the coil and allowed to escape at the other end. The primary to
> secondary
> ratio was about 1:5. Voltage and Frequency measured at the secondary was
> proportional to the rate of gas flow.
>
>
>
> Beau Schwabe Mask Designer IV - ATL
> National Semiconductor Wired Communications Division
> 500 Pinnacle Court, Suite 525 Mail Stop GA1 Norcross, GA 30071
>
>
>
>
> 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/
>
>
>
or visit your local junk yard or repair shop.
you may be able ot hack a discarded one from
the repair shop easily.
Dave
--- In basicstamps@y..., "Nick H" <lightclb@y...> wrote:
> Do you know where these hot wire modules could be found?
> Thanks
> -Nick
>
Original Message
> From: "wizard_80538" <ronaldsa@e...>
> To: <basicstamps@y...>
> Sent: Monday, January 07, 2002 6:58 PM
> Subject: [noparse][[/noparse]basicstamps] Re: Gas flow sensor.
>
>
> > --- In basicstamps@y..., "Henrik Olsson" <henrik-olsson@t...>
wrote:
> > > Hi all,
> > > A little off topic, I know but....
> > > I'm in need of a gas flow sensor capable of measuring about 10
to
> > 30 litres
> > > per minute of argon that can be interfaced to a Stamp or Pic. 0-
> > 10V, 4-20mA,
> > > Frequency, PWM, whatever.
> > > Anyone have any ideas?
> > > Thanks alot!
> > > /Henrik Olsson. Sweden.
> >
> >
> > Hi,
> >
> > I'm currently working on such a device for use in engine testing.
If
> > you need a start simply look for a small hotwire module being
used in
> > an automotive fuel injection application.
> >
> > The hotwires are typically temperature compensated and many output
> > frequency as a signal. Some frequency will be zero flow and then
it
> > will increase as flow increases. The stamp math you decide to use
> > will determine the gas flow accuracy and linearity, provided that
you
> > use a novel way to correlate the flow to an actual real
volume/time
> > number.
> >
> > If you need more help than this contact me at ronaldsa@e...
> >
> > Ron
> >
> >
> > To UNSUBSCRIBE, just send mail to:
> > basicstamps-unsubscribe@y...
> > 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/
> >
> >
>
>
> _________________________________________________________
> Do You Yahoo!?
> Get your free @yahoo.com address at http://mail.yahoo.com
>connected to 15khz pulsed source. A secondary coil like a solenoid and the
>volume of gas passing through the center of the solenoid can be measured by
>variation in frequency and amplitude. I am puzzled about the configuration
>description and the Physics about how this works. Measuring gas flow is not
>my field of knowledge but I would appreciate it if you would explain it to
>me or point me to some references that I may study on-line.
>Thanks, Steve
Picture two "funnels" with each of the narrow ends back to back. One has
a pitch of about 45 degrees (decreasing the diameter to 1/4 that of the
original size) and the other has a pitch of about 30 degrees (increasing
the diameter to it's original size). The center of the Toroid coil is
placed at the center of the two funnels in a way that gas flows through
the center of the T-coil and at the point where the flow of gas is the
fastest. The secondary coil is wound outwards on the 30 degree funnel
perpendicular to the gas flow. As the Toroid coil is pulsed the gas
attempts to align. The secondary picks up on the collapsing alignment
and induces a small charge into the secondary coil. Frequency will
shift depending on if the gas flow speeds up or slows down. The faster
the gas flow, the more current will be induced into the secondary coil
thus causing a rise in the measured output voltage.
Beau Schwabe Mask Designer IV - ATL
National Semiconductor Wired Communications Division
500 Pinnacle Court, Suite 525 Mail Stop GA1 Norcross, GA 30071
I would prefer to use an off the shelf gas flow sensor since this is for a
project at work. The project involves logging all kinds of welding
parameters. It's going to be used with an automated TIG welding machine.
(Arc Machines Inc model 215). And the whole setup will be used in the repair
and maintenence of a nuclear power reactor. Cost is ALMOST not an issue.
I'll look into some more. Thanks again!
/Henrik Olsson.
Regards, Steve
Original Message
From: "Beau Schwabe" <bschwabe@a...>
To: <basicstamps@yahoogroups.com>
Sent: Tuesday, January 08, 2002 7:41 AM
Subject: Re: [noparse][[/noparse]basicstamps] Gas flow sensor.
>
> >Beau; You have made me curious. You mention a Toroid coil with a primary
> >connected to 15khz pulsed source. A secondary coil like a solenoid and
the
> >volume of gas passing through the center of the solenoid can be measured
by
> >variation in frequency and amplitude. I am puzzled about the
configuration
> >description and the Physics about how this works. Measuring gas flow is
not
> >my field of knowledge but I would appreciate it if you would explain it
to
> >me or point me to some references that I may study on-line.
> >Thanks, Steve
>
> Picture two "funnels" with each of the narrow ends back to back. One has
> a pitch of about 45 degrees (decreasing the diameter to 1/4 that of the
> original size) and the other has a pitch of about 30 degrees (increasing
> the diameter to it's original size). The center of the Toroid coil is
> placed at the center of the two funnels in a way that gas flows through
> the center of the T-coil and at the point where the flow of gas is the
> fastest. The secondary coil is wound outwards on the 30 degree funnel
> perpendicular to the gas flow. As the Toroid coil is pulsed the gas
> attempts to align. The secondary picks up on the collapsing alignment
> and induces a small charge into the secondary coil. Frequency will
> shift depending on if the gas flow speeds up or slows down. The faster
> the gas flow, the more current will be induced into the secondary coil
> thus causing a rise in the measured output voltage.
>
>
>
> Beau Schwabe Mask Designer IV - ATL
> National Semiconductor Wired Communications Division
> 500 Pinnacle Court, Suite 525 Mail Stop GA1 Norcross, GA 30071
>
>
>
>
> 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/
>
>
>
What is your budget? I know of several possibilities that may work...
The company I work specializes in these types of devices.
Regards,
Aaron
On Mon, 7 Jan 2002 20:57:34 +0100 "Henrik Olsson"
<henrik-olsson@t...> writes:
> Hi all,
> A little off topic, I know but....
> I'm in need of a gas flow sensor capable of measuring about 10 to 30
> litres per minute of argon that can be interfaced to a Stamp or Pic.
0-10V,
> 4-20mA, Frequency, PWM, whatever.
> Anyone have any ideas?
> Thanks alot!
> /Henrik Olsson. Sweden.
>Thank you all,
>I would prefer to use an off the shelf gas flow sensor since this is for a
>project at work. The project involves logging all kinds of welding
>parameters. It's going to be used with an automated TIG welding machine.
>(Arc Machines Inc model 215). And the whole setup will be used in the repair
>and maintenence of a nuclear power reactor. Cost is ALMOST not an issue.
>I'll look into some more. Thanks again!
>
> /Henrik Olsson.
Henrick,
Check out MKS flow controllers at http://www.mksinst.com/
Greg Hensley
Lawrence Livermore National Laboratory
Defense Sciences Engineering Division
7000 East Avenue Mail Stop L-369
Livermore, CA 94550
Phone: (925) 423-4850
Fax: (925) 422-2118
Email: hensley1@l...
inital cost for a test.
Dave
bty, you you guys spend $800.00 on toilet seats that are seismicly
tested ? Gotta make sure everything works in an earthquake !
--- In basicstamps@y..., Greg Hensley <hensley1@l...> wrote:
> At 01:01 PM 1/8/2002 , you wrote:
> >Thank you all,
> >I would prefer to use an off the shelf gas flow sensor since this
is for a
> >project at work. The project involves logging all kinds of welding
> >parameters. It's going to be used with an automated TIG welding
machine.
> >(Arc Machines Inc model 215). And the whole setup will be used in
the repair
> >and maintenence of a nuclear power reactor. Cost is ALMOST not an
issue.
> >I'll look into some more. Thanks again!
> >
> > /Henrik Olsson.
>
> Henrick,
>
> Check out MKS flow controllers at http://www.mksinst.com/
>
>
>
> Greg Hensley
> Lawrence Livermore National Laboratory
> Defense Sciences Engineering Division
> 7000 East Avenue Mail Stop L-369
> Livermore, CA 94550
> Phone: (925) 423-4850
> Fax: (925) 422-2118
> Email: hensley1@l...
>These MKS sensors are also available on E-bay if you want a lower
>inital cost for a test.
>
>Dave
>
>bty, you you guys spend $800.00 on toilet seats that are seismicly
>tested ? Gotta make sure everything works in an earthquake !
Dave,
I agree with you about Ebay. I referred him to MKS so he could choose
the right model and range for his application first.
As for toilet seats, you've got us confused with NASA. I would
probably put a stamp on it to signal that someone's been thrown
off during the quake!! Much cheaper!!
Greg
[noparse][[/noparse]Non-text portions of this message have been removed]
probably put a stamp on it to signal that someone's been thrown
off during the quake!! Much cheaper!!
Don't laugh I have a cabin in Big Bear CA and was on the white seat when the
quake hit about 10 years ago, I was praying for a seat belt at the time not
to mention the splash effect!!
Original Message
From: "Greg Hensley" <hensley1@l...>
To: <basicstamps@yahoogroups.com>
Sent: January 10, 2002 11:08 AM
Subject: Re: [noparse][[/noparse]basicstamps] Re: Gas flow sensor.
| At 06:20 AM 1/9/2002 , you wrote:
| >These MKS sensors are also available on E-bay if you want a lower
| >inital cost for a test.
| >
| >Dave
| >
| >bty, you you guys spend $800.00 on toilet seats that are seismicly
| >tested ? Gotta make sure everything works in an earthquake !
|
|
| Dave,
| I agree with you about Ebay. I referred him to MKS so he could choose
| the right model and range for his application first.
|
| As for toilet seats, you've got us confused with NASA. I would
| probably put a stamp on it to signal that someone's been thrown
| off during the quake!! Much cheaper!!
|
| Greg
|
| [noparse][[/noparse]Non-text portions of this message have been removed]
|
|
| 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/
|
|
We sold HUGE (80 inch diam) isokenetic stack sampliers to lots of the
nuke plants with one standard approved design, until....
there was an earthquake at one plant and then everything had to be
seismicly tested. talk about raising the costs! the manufacturer
had to hire a nuclear engineer to review everything and.....and ....
the costs went through the roof !
Also IMHO, I think the cost to make and run nuke plants are sooooo
cheap that they have to inflate the building and associated costs
just to spend the money. (end of unresearched opinion)
Dave
back to en-gin-ear-in'
--- In basicstamps@y..., Greg Hensley <hensley1@l...> wrote:
> At 06:20 AM 1/9/2002 , you wrote:
> >These MKS sensors are also available on E-bay if you want a lower
> >inital cost for a test.
> >
> >Dave
> >
> >bty, you you guys spend $800.00 on toilet seats that are seismicly
> >tested ? Gotta make sure everything works in an earthquake !
>
>
> Dave,
> I agree with you about Ebay. I referred him to MKS so he could
choose
> the right model and range for his application first.
>
> As for toilet seats, you've got us confused with NASA. I would
> probably put a stamp on it to signal that someone's been thrown
> off during the quake!! Much cheaper!!
>
> Greg
>
> [noparse][[/noparse]Non-text portions of this message have been removed]