The source capsule and the pigtail are housed in a
shielding device referred to as a exposure device or
camera. Depleted uranium is often used as a
shielding material for sources. The exposure device
for Iridium-192 and Cobalt-60 sources will contain
22 kg and 225 kg of shielding materials,
respectively. Cobalt cameras are often fixed to a
trailer and transported to and from inspection sites.
When the source is not being used to make an exposure, it is locked inside the
exposure device.