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3 Place the detector on the surface of the container so that there is no
significant air layer between the detector and the food product.
4 Place the detector above the surface of the food container in the case there
is some air layer at the package top and the food container is large-sized and
heavyweight. In such a way, firstly, you can avoid too much pressure on the
detector's housing; secondly, reduce the influence of a possibly contaminated
surface on which a tested product is located.
Figure 2.33 – Placing the detector above the food container
5 Use a plastic bag and change it from time to time to prevent the detector
from being polluted.
Figure 2.32 – No air layer
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