T
thom thacker
Guest
Does anyone know how to build a simple device for detecting gas bubbles in a
tube of flowing liquid.
tube of flowing liquid.
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J
John Popelish
Guest
thom thacker wrote:
through a plastic or glass tube. The ones with an adjustable
sensitivity are best.
Do a Google search for [capacitive proximity sensors].
e.g.
http://www.turck-usa.com/illustrations/B1004_D39-D40.pdf
--
John Popelish
A capacitive sensor can sometimes distinguish between liquid and gasDoes anyone know how to build a simple device for detecting gas bubbles in a
tube of flowing liquid.
through a plastic or glass tube. The ones with an adjustable
sensitivity are best.
Do a Google search for [capacitive proximity sensors].
e.g.
http://www.turck-usa.com/illustrations/B1004_D39-D40.pdf
--
John Popelish
J
John Popelish
Guest
Some more:
http://www.am.pepperl-fuchs.com/pdf/fa/documents/sc04-035.pdf
http://www.am.pepperl-fuchs.com/pdf/fa/documents/SC04-P034.pdf
Page 4 of:
http://www.ab.com/catalogs/c114/4capprox/401924.pdf
--
John Popelish
http://www.am.pepperl-fuchs.com/pdf/fa/documents/sc04-035.pdf
http://www.am.pepperl-fuchs.com/pdf/fa/documents/SC04-P034.pdf
Page 4 of:
http://www.ab.com/catalogs/c114/4capprox/401924.pdf
--
John Popelish
A
Andreas Rutz
Guest
thom thacker wrote:
and an off-axis detector to pick up the light scattered by the bubbles.
depending on bubble size, an optical method could work. add a light sourceDoes anyone know how to build a simple device for detecting gas
bubbles in a tube of flowing liquid.
and an off-axis detector to pick up the light scattered by the bubbles.
T
tom thacker
Guest
Thanks for the input, actually the tube carrying the liquid will probably be
copper and possibly stainless steel. under pressures of 125 to 275 psi.
There is a device on the market that has two sensors that attach to the tube
about 3 inches apart and the bubbles are detected and indicated as an
audible noise.
"thom thacker" <tomthacker@adelphia.net> wrote in message
news:dr6dnfimQpRy90bcRVn-sw@adelphia.com...
copper and possibly stainless steel. under pressures of 125 to 275 psi.
There is a device on the market that has two sensors that attach to the tube
about 3 inches apart and the bubbles are detected and indicated as an
audible noise.
"thom thacker" <tomthacker@adelphia.net> wrote in message
news:dr6dnfimQpRy90bcRVn-sw@adelphia.com...
Does anyone know how to build a simple device for detecting gas bubbles in
a tube of flowing liquid.
J
Jamie
Guest
thom thacker wrote:
erratic, i guess you could also detect for
sudden changes. if its a glass tube that should do it.
then there is the optical method, but that involves
a complex twisted alignment .
induction is also another possible...
bubbles can cause electrical property changes that
can be used different ways.
also theirs the system we use where we have a
Sonic Transducer on a glass rod we in a boiler system
to detect levels and bubbles. we have it set so the
receiver will pick up its own signal if there is bubbles
or lack of water.. this works because the water acts as a
cushion to not allow the sonic to reach the other end.
the more dense the water is the less the tube vibrates.
of course this takes place on the high end of the sonic
spectrum.
there are many possible ways, i think they already make
devices that you can attached that are of a capcaitive
method.
that of course may not work if the fluid isDoes anyone know how to build a simple device for detecting gas bubbles in a
tube of flowing liquid.
all i can think of is a capacitive detector.
erratic, i guess you could also detect for
sudden changes. if its a glass tube that should do it.
then there is the optical method, but that involves
a complex twisted alignment .
induction is also another possible...
bubbles can cause electrical property changes that
can be used different ways.
also theirs the system we use where we have a
Sonic Transducer on a glass rod we in a boiler system
to detect levels and bubbles. we have it set so the
receiver will pick up its own signal if there is bubbles
or lack of water.. this works because the water acts as a
cushion to not allow the sonic to reach the other end.
the more dense the water is the less the tube vibrates.
of course this takes place on the high end of the sonic
spectrum.
there are many possible ways, i think they already make
devices that you can attached that are of a capcaitive
method.