Role of the control dosimeter
A control dosimeter is provided for each type of dosimeter and each wear period. The control dosimeter is used to subtract the natural background and track potential dose during the transport.
It is essential that control dosimeters are not worn or used.
In order to correctly identify control dosimeters and differentiate them from others, LANDAUER has created a distinctive label:
- marked as ‘control”
- pictogram according to badges
- yellow background for all types of dosimeters.
Chest dosimeter
Finger dosimeter
Lens dosimeter
They must be stored in a location free from radiation generated from your installations.
They are shipped and read in the same way as personal dosimeters. Their use allows to subtract doses due to the natural background or received during transport (for example, during X-ray scaning on logistics platforms, in ports and airports).
Control dosimeters should be returned to us together with the other dosimeters. In the absence of the control dosimeter when the parcel is returned to our laboratory, the control dose is calculated:
- from dose history for the same service
- in the absence of history, from the natural radioactivity dose known at the location where the dosimeters are likely to have been used.