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IN-LINE
PHOTOMETRY
Product changeovers are carried
out multiple times every day in
process streams where numerous
products are manufactured.
Automating changeover with real
time, reliable and repeatable in-line
detection can quickly increase
profitability.
This can be achieved by:
• Reducing product losses
• Reducing effluent loading/BOD
• Reducing maintenance costs
• Improving quality assurance
• Improving productivity and
operational safety due to
reduced process disruptions
Optek in-line photometers have
the proven ability to quickly and
reproducibly detect the ideal
switch point within mixed phases.
In-line change-over measurements
using process photometry can
be performed based on colourindependent
absorption (NIR),
colour intensity (VIS), turbidity or a
combination of all three.
In-Line photometry provides
a faster, more precise and
more repeatable detection
of changeover switch points
compared to conventional visual
detection, time-based, volumebased
or conductivity based
changeover process control.
Because in-line photometry
provides faster and more
repeatable interface detection over
all other methods of detection,
the switching time benefit gained
through process photometry
means more product is saved and
effluent loading is reduced. The
cost savings mean that systems
commonly pay for themselves
within a matter of months.
Low maintenance design and
construction means that further
savings can be made through the
reduction in process line disruption
and maintenance costs.
There are many applications where
Measure-up TEMPERATURE 150 —
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Pocket
Thermometers
low-cost convenience
Wireless Logging Systems
logistics & storage
Datalogging
– all needs
DATATRACE In-situ Logging
– pasteurisation
+64 9 525 1875 | info@belltechnology.co.nz | belltechnology.co.nz
Reference
Instruments
0.1, 0.01, 0.001°C
All Cold-chain
Solutions
Process Measurement / Control High-end Process Datalogger
Data Acquisition • Cloud • pH • BRIX • Conductivity • Vibration • Moisture • DO • Temperature • RH • Colour • Turbidity • Sensors
FT705
mA Signal
time
Water
0% Milk
Mixed Phase Milk
100% Milk
Switch point absorption
Switch point
conductivity
Defined zero of
absorption
Delayed
response
Zero span conductivity
– dependent on water
quality
Milk
-spread of
conductivity
t1
t2
Absorption milk
Spread of turbidity
Δt
t3
t1 = switch moment of photometric measurement
t2 = switch span of conductivity measurement
t3 = switch moment of conductivity measurement
The switch time gain of photometric measurement results from ΔT = t3 – t1
Interface detection comparison:
In-line process photometry and conductivity measurements for milk
Delayed
response
In-Line photometry has been used
with impressive results including:
dairy products, vegetable and
edible oil refining, winemaking,
juice and beverage production and
sugar refining.
For more information contact Bell
Technology, phone 09 525 1875 or
email info@belltechnology.co.nz.
Optimises product changeover for
reduced production costs
/www.foodtechnology.co.nz
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