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SENTINEL™ Model 959 Gamma Radiography Exposure Device is manufactured by QSA Global, Inc. , USA.


SENTINEL™ Model 959 Gamma Radiography Exposure Device from QSA Global, Inc. performs directional beam gamma radiography of welds and the adjacent heat affected areas on pipelines and industrial structures. To carry out its task, the Model 989 contains a Selenium 75™ special form sealed source with a maximum activity of 20.0 Curies (740 GBq.).

The Model 959 is specifically designed for Small Controlled Area Radiography (SCAR), enabling safe radiography in areas congested with workers. Moreover, when compared to conventional crank-out radiography systems, the Model 989 significantly reduces the distances to “controlled” or “restricted” areas.

The basic radiography system comprises the Model 959 exposure device and and standard Sentinel controls, either the 664 Reel Type Control Unit or the 692/693 Pistol Grip Control Unit. The pneumatic actuator is available as an option. Features: Uses  Selenium 75™ (20 Ci Max) Directional Beam Device Small and Lightweight Tungsten and Lead Shielding


  • Length: 7.9 inches (20.1 cm).
  • Diameter: 3.5 inches (8.9 cm) Mass: 16lb (7.3kg).
  • Source Capacity: 20.0 Curies (740GBq) Selenium-75 as special form.

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Additional information

Weight 1 kg