FLIR identiFINDER R200, Manual

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Another factor would be the number of pellets in a load, which is akin to the number of photons
being hurled into space (one would expect stronger sources to hurl more , and weaker fewer). There
are, of course, more factors in radiation since there are so many different sources with differing prop-
erties.
Now this is static on the paper target in that it is a captured frame of time (a moment in time, captured
shortly after a solitary shotgun blast).
Data is constantly being collected by the FLIR identiFINDER R200, and the sigma settings "zero in"
the focus for those data points (think a series of paper targets), with a wide setting (9.9) only picking
up those "pellet holes" that are on the outside edges (much fewer, but this depends on the "strength"
of the source of radiation), and as the device is focused more with a smaller and smaller sigma set-
ting, the more are the pellet holes where the density is greater (near the mean) and thus yield more
opportunities to trip the alarm and deliver annuciation (vibration, beeper or LED) when a data point
crosses that threshold.
The Bottom Line on Sigma
The sensitivity of the detection of unusual gamma radiation can be defined. Specify a value from 1.0
to 9.9. The lower the value, the better the sensitivity for radiation increases but more notifications can
be expected. Higher values are recommended to reduce false notifications in environments with gen-
erally low radiation levels.
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