Selenium 75


A Selenium source is formed by compressing the Se-74 (or Se-74 compound) into the desired shape and encasing it in an outer capsule. The Selenium 75 sources we offer are either cylindrical or spherical.
For a cylindrical source there are two dimensions quoted, 2x2mm for example refers to a source which is 2mm in diameter and 2mm in height. The dimensions of the source are always equal resulting in a source that is almost cubic in profile.
A spherical source has the Se-75 formed into a sphere. A spherical source is the best shape for radiography. The spherical Se-75 sources we offer give the highest activity for a given physical size resulting in high resolution and quick radiographs.




Product CodeSE001
Energy Range (KeV)100-400
Half Life (days)119.8
Equipment to which it can be loaded

II, V VI, X CPR, FCPR, 660/880 Projectors

Steel Working Thickness (mm)



Extra Information

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Product Code:SE001
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Product Type:
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The Future of Gamma Radiography


Gilligan Engineering Automated Windout

The Gilligan Engineering Automated Windout is a revolutionary piece of equipment that can deliver zero dose gamma radiography. The weatherproof case houses the twin microprocessor PCB, power supplies and UPS battery. The revolutionary Automated Windout allows the user to use mains power or battery power for an automated exposure.



The Automated Windout can be programmed by the operator for not only exposure time but also prewarn (imminent) delay. Conventionally the radiographer would remotely expose the isotope from a relatively close distance resulting in a dose experienced by the radiographer. The Automated Windout allows the source to be exposed automatically at a suitable delay preset by the radiographer. The radiographer will program this time depending on the time it would take for them to vacate the area. The Automated Windout will then pause for this time before exposing the source. This technique can result in zero dose radiography and is a real milestone in the aim of dose minimisation.