Isotope identification (RIID) is the process of determining not just the presence of radioactive material, but the specific isotope(s) — for example, distinguishing Cs-137 from Co-60 or U-235. This matters because different isotopes present different risks: some are medical or industrial sources with legitimate uses, while others are potential special nuclear material (SNM) or radiological threats. BNC’s SAM series handheld RIIDs use gamma-ray spectroscopy to identify isotopes in real time, enabling first responders and security personnel to make rapid, informed decisions.