Applications & Authorized Contents - QSA Global SENTINEL SENTRY 330 Manual

1.3 Applications & Authorized Contents
The SENTINEL SENTRY 110 and SENTRY 330 are radiographic gamma-ray source projectors used for
industrial applications of gamma radiography with Cobalt-60 to inspect materials and structures. They
are intended for industrial gamma radiography of various materials in the following approximate thickness
range:
Steel from 2 to 8 inches (50-200 mm)
Light alloys from 1.5 to 7.5 inches (40-190 mm)
Concrete from 10 to 40 inches (200 to 1,000 mm)
Compacted metallic Cobalt-60 pellets are doubly encapsulated in welded stainless steel or titanium
capsules. The sealed sources are designed and tested to achieve an ISO/ANSI minimum classification of
97C64515 and to comply with the IAEA and USDOT requirements for 'Special Form' radioactive material.
The ISO/ANSI classification 97C64515 stated in this manual refers to the complete source capsule which
is attached to the source assembly.
The double-encapsulated sealed source is swaged to one end of a source holder consisting of a flexible
steel cable which has a female half of a connector at the other end, used for coupling to a control cable
connector. The female connector also incorporates a stainless steel stop-ball swaged onto it (older
versions of this source wire had the stop-ball as a separate component from the female connector). The
purpose of the stop-ball is to provide mechanical positioning of the source assembly within the gamma-
ray source projector's shielding and to provide a means of securing the source assembly in the gamma-
ray source projector's locking mechanism.
Table 1 - SENTINEL SENTRY 330 authorized contents
Isotope Assembly
Model Number
Cobalt-60 A424-13
Cobalt-60 A424-14
Cobalt-60 943
Table 2 - SENTINEL SENTRY 110 authorized contents
Isotope Assembly
Model Number
Cobalt-60 A424-14
Cobalt-60 943
Table 3 - Source output
Isotope At 1 m per Ci (37 GBq)
Cobalt-60 1.30 R/hr
QSA Global, Inc. 
Gamma
Energy Range
1.17-1.33 MeV
1.17-1.33 MeV
1.17-1.33 MeV
Gamma
Energy Range
1.17-1.33 MeV
1.17-1.33 MeV
13.0 mSv/hr
40 North Avenue Burlington, MA 01803
Operations Manual  MAN-038 March 2019
Half Life Approximate
Steel Working
Thickness
5.27 years 50-150 mm
5.27 years 50-150 mm
5.27 years 50-150 mm
Half Life Approximate
Steel Working
Thickness
5.27 years 50-150 mm
5.27 years 50-150 mm
At 1 ft per Ci (37 GBq)
14.0 R/hr 140 mSv/hr
 888.272.2242  781.272.2000
 Page 8 of 100
Device/Source
Maximum
Capacity
330 Ci 12 TBq
110 Ci 4 TBq
110 Ci 4 TBq
Device/Source
Maximum
Capacity
110 Ci 4 TBq
110 Ci 4 TBq
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