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Near Infrared (NIR) Instrumentation
On-Line NIR Gauges
FG710
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The
FG710 Infrared Gauge is the ultimate sensor for high precision
measurement of basis weight or thickness of single or
multi-layer films.
NDC is unique in producing our
own high resolution IR filters. When incorporated into our
robust measurement head, this application-crafted infrared
sensor can continuously measure up to four product constituents
at the same time, making it ideal for co-extruded films. The
gauge is capable of measuring film thickness from 12 to 5000
microns (0.5 to 200 mils), dependent on material type and film
construction. |
High Measurement Precision
Fast Response Time
Measurement of Many Types of
Polymers
Monitors up to Four Different
Product Constituents simultaneously
High Tolerance to Changes in
Ambient Condition and Web Flutter
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The
IG710 backscatter gauge delivers the highest accuracy coat
weight and moisture measurements. Its ultra fast 7.5 msec
measurement cycle makes it ideal for high-speed web applications
whether scanning or not. The stability of the IG710 is
unrivalled and its superb signal to noise performance, some 10
times better than conventional NIR gauges, allows precise
control of a process to the specification limit. The IG710 can
measure up to 4 components simultaneously but a common
configuration would be both coat weight and moisture.
The IG710 gauge is ideal for
measuring a huge range of coatings, barrier layers,
impregnations, organic or water based coatings on a wide range
of plastic, paper, textile and nonwoven substrates. The gauge,
with its high sensitivity and NIR selectivity, can measure thin
coatings on thick substrates without the need for differential
measurement in many cases. |
SpeedCal pre-calibrated
Ultra high speed for maximum
precision
Dual detector technology for
high stability measurement
Window contamination monitor
Unaffected by ambient
conditions
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The
FS710 near-infrared sensor has several distinct applications:
Moisture content in paper
Paper or nonwovens basis
weight
Thickness of voided films
Thickness of pigmented films
The FS710 technology is ideal
for products where infrared light can be transmitted through the
material, but where there is a high degree of scatter when the
IR light strikes the product. With a standard IR transmission
gauge, this results in large signal loss and poor signal to
noise ratio.
The FS710 uses unique forward
scatter technology to capture a high percentage of this
scattered light to insure that the signal level is excellent for
even the heaviest measurable materials.
The FS710 is capable of
measuring film thickness from 12 to 250 microns (0.5 to 10
mils), dependent on material type and film construction. It is
also capable of making very accurate moisture measurements of
papers up to 200 gsm basis weight.
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High Accuracy "Forward
Scatter" Gauge
More accurate moisture
measurement than IR reflectance gauges
reduced signal loss on highly
light-scattering products
Up to four simultaneous
measurements
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The
TFG710 on-line measurement sensor provides high-accuracy,
high-resolution profiles of thin biax and cast film products
using a patented near infrared design.
The TFG710 thin film gauge is a
near-infrared sensor that achieves a new level in on-line
measurement accuracy and performance. It is insensitive to
humidity, barometric pressure, or gap temperature. There is no
radioactive source capsule to replace every two years in order
to maintain accuracy.
Because the wavelength of the
NIR light energy is very close to the thickness of very thin
plastic films, a phenomenon called optical fringe interference (OFI)
can occur. OFI can have a devastating effect on measurement
accuracy, making a standard NIR gauge practically unusable for
some products. The TFG710 gauge employs a patented technique
that cancels the effect of optical interference, allowing the
sensor to make highly accurate measurement of films less than 2
microns thick! |
Designed specifically for cast
and biax films
True thickness measurement of
thin film products (down to 2 µm or less)
Provides real-time measurement
(first scan)
Immune to optical fringe
interference
Insensitive to changes in
pass-line, temperature, humidity, haze, or orientation
Built-in insensitivity to
flutter, scanner mechanical run-out
Order of magnitude more
accurate than Pm-147 beta sensors
Ten times faster response than
traditional NIR gauges
Multi-component measurement
discrimination
Simple to calibrate, requiring
no special tools or skills
Large (3 inch) measuring gap
Five-year warranty on all
mechanical parts
Non-nuclear sensor requires no
special licensing, handling or testing procedures
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The
SR710 specular reflectance gauge is designed specifically to
provide ultra high precision measurements of thin coatings on
shiny metallic/metallized substrates and foils. Coatings as low
as 50mg/sq meter can be measured in lube applications on can
stock, through to lacquers or other coatings well in excess of
20gsm. Key applications include extrusion coatings, lacquer and
wax coatings on aluminum foils in can stock and a huge range of
lacquers coated in flexible packaging applications. The SR710
can handle multi-component measurements and therefore is capable
of analyzing multi-layer coating structures when there are
chemical differences between them.
The SR710 offers fast 7.5msec
measurement update speed, ideal for scanning or fixed point
measurements on high speed webs. The gauge is designed to
eliminate optical interference and delivers extremely high
measurement accuracy not possible with conventional gauging
systems. The dual detector technology infers high stability and
so can be used with confidence to control web processes.
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Optical system eliminates optical
interference
SpeedCal pre-calibrated
Ultra high speed for maximum
precision
Dual detector technology for
high stability measurement
Unaffected by ambient
conditions
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