Baking & Snack - September 2023 - 104

QUALITY ASSURANCE
paper as long as it's on the surface, so it greatly expands
what X-ray technology was able to do previously, " said
Kyle Hermes, vice president, TDI Packsys.
While some retailers are now requiring X-ray inspection
by their suppliers, that doesn't mean it's better than
metal detection.
" Given that metal is the No. 1 high-risk uncontrolled
contaminant source, metal detection should be a
given, " said Eric Garr, regional sales manager, Fortress
Technology. " It is never worth replacing a metal detector
with an X-ray machine, as users will lose virtually
all detection of low-density alloys unless a very large
chunk presents itself, like aluminum. An X-ray machine
can be added to a line if there are specific needs, such
as potential contaminants that won't be detected with a
metal detector. "
Mr. Grube pointed out that metal detectors and X-ray
machines have different strengths and weaknesses, and
using both in conjunction with each other can maximize
product safety.
" X-ray machines allow operators to detect foreign objects
or to see large gaps in packaging; metal detectors
can only alert operators to the presence of metals, " he
explained. " One advantage of using X-ray inspection is
the ability to find more than just metal. "
The exception is aluminum, a very low-density
metal where metal detectors may outperform X-ray
machines. Mr. Grube added metal detectors have a
much lower purchase price and cost of ownership than
X-ray inspection.
Mr. Hermes said the next big push involves dual energy,
which looks at molecular composition.
" No longer is X-ray technology limited to density
composition, " he observed. " We're able to detect everything
based on molecular composition. "
Newer metal detection and X-ray technology now
apply algorithms to enhance detection capability, reduce
false rejects and improve efficiencies without turning
down the sensitivities of the devices, noted Rob
Rogers, senior adviser for food safety and regulation,
Mettler-Toledo.
" With multi-simultaneous frequencies, we're able to
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104 Baking & Snack September 2023 / www.bakingbusiness.com
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