The HSA 120 equipment belongs to a family of
non-destructive analyzers intended for monitoring headspace gas compositions in
optically transparent and sealed containers. It employs a non-invasive
laser-based technique for monitoring the headspace levels of gases such as
oxygen, carbon dioxide and moisture content.
HSA 120 is designed to perform the 100 % Headspace Gas Analysis of the
production; it offers an output rate of 7200 containers per hour. In a typical configuration,
the equipment is loaded by an operator on an infeed tray system; infeed system
is comprising a conveyor belt that leads containers to the starwheel. As a
result of the transport process, the container is placed in front of the HSA
sensor which is set up for the required gas measurement. The equipment can also
be configured to perform an online inspection process.
Headspace Analysis “HSA” is based on the Tunable Diode
Laser Absorption Spectroscopy (TDLAS) method which accurately detects and
quantifies gaseous concentration levels. A diode laser beam is transmitted
through the container in the region above the product and below the cap/closure
(headspace); laser beam is then received by a detector. The amount of light
absorbed while crossing the headspace is measured and related to the target gas
concentration.
The laser beam wavelength is tuned around the absorption frequency of the
target gas to be monitored.
The HSA technology allows to perform a quick and accurate monitoring of
headspace gas, by determining the nitrogen purging efficiency and by ensuring
container closure integrity; it is applicable to sterile products that are
packaged under modified atmospheric conditions or under a certain level of
negative pressure.
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