SENTINEL™ Iridium-192
Industrial Radioisotopes


QSA Global, Inc. is the world-leading supplier of SENTINEL Iridium-192 (Ir-192) sealed radioisotope sources to the industrial gamma radiography industry. Our exclusive and diversified supply chain ensures a reliable, long-term supply of SENTINEL Ir-192 to our customers.

Our SENTINEL Ir-192 radioisotope sources are available up to 240 Ci (8.88 TBq) activity. Custom activities may be ordered to meet your specific application needs. 

QSA Global, Inc.’s SENTINEL Ir-192 radioisotope sources are double-encapsulated and laser welded for superior quality and safety. Natural and enriched Iridium-192 sources are constructed using iridium metal discs or pellets of uniform size in a welded stainless steel capsule.  Utilizing enriched Ir-192 produces smaller focal sizes for optimum image quality. 

SENTINEL Ir-192 is designated for use within the steel thickness range of  0.39 in-3.54 in (10 mm-90 mm) per ISO 5579:2013.

SENTINEL Ir-192 in Gamma Radiography

Iridium is also used throughout the industrial radiography industry to detect structural damage to metal parts. QSA Global, Inc.’s SENTINEL Ir-192 radioisotope sources are used to perform industrial gamma radiography on materials such as castings, forgings, and weld defects.

MaterialApproximate Material Density
Concrete2.35 g/cm3
Steel7.80 g/cm3
Lead11.34 g/cm3
Tungsten17.80 g/cm3
Gamma206-612 keV
Energy Range
Steel0.39 in-3.54 in (10 mm to 90 mm)
Radioisotope OutputAt 1 m per Ci (37 GBq): 0.48 R/hr
(4.80 mSv/hr)
 At 1 ft
per Ci (37 GBq): 5.2 R/hr (52.0 mSv/hr)
Half-Life74 days
SpecialUSA/0392/S-96, USA/0179/S-96
Form Certification

Transportation, Support, & Disposition

Transporting Isotopes​

QSA Global, Inc. distributes radioisotope sources worldwide by utilizing the industry’s largest fleet of source changers. Source changers are available to deliver a single source up to ten sources in a container for device reloads at your facility or at one of QSA Global, Inc.’s authorized service centers.

Loading & Unloading​

QSA Global, Inc. offers a variety of options for SENTINEL Ir-192 source changes to minimize downtime of your assets. QSA Global, Inc. and our authorized distributors can reload your SENTINEL Ir-192 device at local facilities around the world by trained technicians or sources can be delivered directly to your facility for reload by your trained technicians.

Isotope Disposition

Radioactive materials that are no longer required must be transferred to a licensed recipient for final disposition. QSA Global, Inc. provides a one for one exchange on SENTINEL Ir-192 radioisotope sources.

SENTINEL Ir-192 Gamma-Ray Source Projectors

QSA Global, Inc.’s SENTINEL Ir-192 radioisotope sources and source assemblies were designed specifically for use in our Ir-192 gamma radiography source projectors.  Using QSA Global, Inc. radioisotope sources and approved accessories and following recommended maintenance guidelines is the most effective way to maximize the safety and reliability of your QSA Global, Inc. gamma radiography device.

Ir-192 radioisotopes are available for the following current and previous Ir-192 gamma-ray source projectors.


SystemAssembly NumberSpecial Form CertificationMax Capacity
SENTINEL 880 Series Delta


View Certificate150 Ci
(5.55 TBq)
SENTINEL 880 Series EliteA424-9View Certificate50 Ci
(1.85 TBq)
SENTINEL 880 Series OmegaA424-9View Certificate15 Ci
(0.55 TBq)
SENTINEL 959M SCAR875View Certificate81 Ci
(3.00 TBq)
SENTINEL 86586520View Certificate

240 Ci
(8.88 TBq)