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3 Product description
VEGASOURCE 82 • Source holder
66076-EN-220119
The radioactive source in the source container emits gamma rays.
The VEGASOURCE 82 is mounted on the vessel or the pipeline
directly opposite the sensor.
The source holder shields the environment against gamma radia-
tion and protects the radioactive source from mechanical damage or
chemical influences. In case of large measuring ranges (e.g. with high
vessels) two or more source holders are used.
The VEGASOURCE 82 consists of the components:
1
2
3
4
Fig. 6: Source holder VEGASOURCE 82
1 Source holder
2 Cover (optional)
3 Transport lug
4 Mounting surface
The rays emitted by the gamma source are damped when penetrat-
ing the medium. The sensor detecting the attenuated radiation on the
opposite side of the vessel calculates the measured value from the
intensity of the radiation.
Max. activity of the sources
The following table states the max. activity of the sources. Production-
related fluctuations of the radiation activity and tolerances of the
measuring instruments are not taken into account.
Local dose rate
Country
USA
Europe II
Europe
Distance m (in)
0.3 m (1 ft) 1 m (3.3 ft) 0.3 m (1 ft)
Field (µSv/h)
50
3
3
Max. activity
300 mCi
200 mCi
20 mCi
Tab. 2: Local dose rate at standard distance
Caution:
The max. permissible activity of the source can be further limited by a
country-specific approval.
Functional principle
Source
