Dosimeter (Looks like a pen with the pocket clip)- This
device measures measures the accumulated radiation that your body
was exposed to during a walk into a "hot" zone, or a
walk outside of your falloutshelter. You will record the reading
in a log once you get back to a safer zone then zero and replace
into your pocket.
The direct-reading pocket dosimeter is a portable instrument
designed to measure the total dose of moderate and high levels
of gamma radiation. The common dosimeters are designated the CD
V-138, CD V-730, CD V-740, and CD V-742. The instruments make
use of a small quartz fiber electoscope as an exposure detector
and indicator. An image of the fiber is projected onto a film
scale and viewed through the eyepiece lens. The scale is calibrated
in milliroentgens (mR) or roentgens (R), depending on the model,
and may be read by looking through the eyepiece toward a lamp
or other source of light. A CD V-750 or 756 dosimeter charger
must be used in conjunction with the dosimeter to set the instrument
to zero. The charger may also be used to read the scale.
Charger - This unit re-sets the dosimeter to zero so that
the next time you go out the reading will be at zero enabling
you to add the numbers in the log much easier.
Dosimeters and their required Chargers should be readily seen
as an important additional asset by anyone that already understands
the need for a survey meter. In fact, Bruce
Beach even says; "If I had to choose between owning only
a rate meter or owning only a dosimeter - I would choose the dosimeter."
He also has some creative strategies for making the most of their
use at Radiation
and Detectors.
When Looking through the end of the dosimeter you
will see one of the scales below:
