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Principle of Operation
Principle of Operation
The principle of operation of
The principle of operation of
the Tru Pointe
the Tru Pointe
gasses. Turbulent
gasses. Turbulent
fl
fl
ow has a high
ow has a high
Imagine air leaking from a tire.
Imagine air leaking from a tire.
Because this is such a large leak, your ear can detect this sound,
Because this is such a large leak, your ear can detect this sound,
however your ear hears only about 1/3 of the actual spectrum of sound which exists.
however your ear hears only about 1/3 of the actual spectrum of sound which exists.
of small leaks is mostly ultrasonic which your
of small leaks is mostly ultrasonic which your
EXAMPLE:
EXAMPLE:
gas supply and left free
gas supply and left free
will not generate sound if the volume of gas through
will not generate sound if the volume of gas through
it is such that turbulence does not take place.
it is such that turbulence does not take place.
that same
that same
ow, an opening as small as 0.005 of an inch
ow, an opening as small as 0.005 of an inch
fl
fl
could generate enough sound to be heard several feet
could generate enough sound to be heard several feet
away.
away.
For a leak to happen there must be an opening in the system that carries a gas or
For a leak to happen there must be an opening in the system that carries a gas or
these openings are not clean smooth holes, but
these openings are not clean smooth holes, but
edges and internal chambers. Fluid or gas
edges and internal chambers. Fluid or gas
turbulence, random
turbulence, random c
circular-like motions.
ircular-like motions.
normally laminar which means that a given layer of gas does not mix with layers above it or below
normally laminar which means that a given layer of gas does not mix with layers above it or below
it.
it.
This condition happens in a straight
This condition happens in a straight lon
leaking out of a straight and long tube will not generate as much sound as if it
leaking out of a straight and long tube will not generate as much sound as if it
a small crack because the
a small crack because the
fl
fl
ow is not turbulent.
ow is not turbulent.
The intensity of sound generated at
The intensity of sound generated at
perature, the speed the
perature, the speed the
fl
fl
uid is moving, the Reynolds number, the pressure differential across the
uid is moving, the Reynolds number, the pressure differential across the
leak, and the physical dimensions and
leak, and the physical dimensions and
quantify the size of a leak with ultrasonic technology
quantify the size of a leak with ultrasonic
than a larger one.
than a larger one.
The Tru Pointe
The Tru Pointe
®
®
2100 detects ultrasound NOT the presence of a
2100 detects ultrasound NOT the presence of a
"Sniffer".
"Sniffer".
Because of this fact,
Because of this fact, t
the Tru Pointe
he Tru Pointe
concentration of fumes renders other detectors useless.
concentration of fumes renders other detectors useless.
WARNING!
WARNING!
leak if there is no turbulent
leak if there is no turbulent
checked.
checked.
If you suspect a toxic
If you suspect a toxic ga
other combustible gas leak and it is not detected by the
other combustible gas leak and it is not detected by the
Tru Pointe
Tru Pointe
®
®
2100, do not assume it doesn't
2100, do not assume it doesn't
use another method as veri
use another method as veri
present.
present.
www.actoolsupply.com
www.actoolsupply.com
®
®
2100 is based on the turbulent
2100 is based on the turbulent
content of ultrasound, which the Tru Pointe
content of ultrasound, which the Tru Pointe
ear can not detect.
ear can not detect.
A piece of straight tubing connected to a
A piece of straight tubing connected to a
to exhaust into the atmosphere
to exhaust into the atmosphere
passages through cracks with many jagged
passages through cracks with many jagged
escaping through an "ori
escaping through an "ori
Inside a tube where a gas may be
Inside a tube where a gas may be
long tube when the velocity of the
g tube when the velocity of the
a leak is
a leak is
a very complex function of the viscosity, the tem-
a very complex function of the viscosity, the tem-
characteristics of the ori
characteristics of the ori
fi
fi
ce.
ce.
technology.
.
A smaller leak may generate mor
A smaller leak may generate
speci
speci
®
®
2100 can function in areas where heavy wind or a
2100 can function in areas where heavy wind or a
Ultrasonic detectors will not indicate a
Ultrasonic detectors will not indicate a
ow producing sound when
ow producing sound when
fl
fl
gas, natural gas, or
s, natural gas, or
exist, and
exist, and
fi
fi
cation there is no gas leak
cation there is no gas leak
I
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-
-
9
9
0
0
0
0
3
3
fl
fl
ow of
ow of
fl
fl
uids and
uids and
®
®
2100 can detect.
2100 can detect.
The sound
The sound
Y
Y
et for
et for
fl
fl
uid. Normally,
uid. Normally,
fi
fi
ce" like this, is forced into
ce" like this, is forced into
fl
fl
owing, the
owing, the
fl
fl
ow is
ow is
fl
fl
uid is not high.
uid is not high.
A gas
A gas
were leaking out of
were leaking out of
This is why it
This is why it
is impossible to
is impossible to
more sound
e sound
fi
fi
c gas.
c gas.
It is NOT
It is NOT
a gas
a gas
15
15
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