NDT Products


The SENTINELTM range of double encapsulated special form sealed source assemblies caters to most industrial applications using gamma radiography.


A choice of isotopes provides solutions for the widely varying requirements demanded by different materials and site conditions. Sources with outputs ranging from less than one curie up to several hundred are available; all precision constructed to ensure the highest possible specific activities and the smallest focal spot sizes.


Source exchange is available as a service either on-site or when source projectors are returned to SENTINELTM for inspection or overhaul. Sources can be shipped in the source projector or in a suitable returnable transport container.

Ytterbium-169 sources are available in spherical and right circular cylinder focals, housed in a welded titanium alloy capsule.

INC-IR100 uses Source Model # 87703, and SPEC-150 uses Source Model # 96901

1 Selenium-75 and Iridium-192 use the 650L Source Changer, while Cobalt-60 uses the 770 Source Changer.

SKU: Ytterbium-169 Category:

Additional information

Source Model


Half Life

32 Days


63-308 KeV

Steel Working Range

.16 in to .79 in (4 mm to 20 mm)