QSA Global - Cobalt-60 Sentry Source Projector QSA Global| 16724 QSA Global - Cobalt-60 Sentry Source Projector Print QSA Global| 16724 QSA Global - Cobalt-60 Sentry Source Projector The Sentry Cobalt-60 source projectors are mobile industrial radiographic exposure devices for use in the field. They consist of a titanium “S” tube and casted depleted uranium (DU) shield contained within a 300 series stainless cylinder. [table id=Cobalt60_EN /] SENTRY110: Sentry projector – Cobalt-60 up to 110 Curie. SENTRY330: Sentry projector – Cobalt-60 up to 330 Curie. Accessory 85950: Transport cart for Sentry projector. Request for information