Authorised Indian Distributor
Saxsons Group
New Delhi, India · Since 1997
NIST-traceable QA reference sources sized for the standard reference-source workflow in a nuclear-medicine department — dose calibrator, well counter, PET system QC. Co-57, Co-60, Cs-137 and Ba-133 available individually or as a four-isotope reference set with full AERB import documentation.
| Isotopes available | Cobalt-57 (Co-57); Cobalt-60 (Co-60); Caesium-137 (Cs-137); Barium-133 (Ba-133) |
| Form | Individual sources or a four-isotope reference set |
| Half-lives | Co-57: 272 d · Co-60: 5.27 y · Cs-137: 30.1 y · Ba-133: 10.5 y |
| Energy coverage | Ba-133 81 keV → Co-60 1.173 / 1.332 MeV (full clinical span) |
| Calibration accuracy | ±5% (direct comparison to NIST standards) |
| Traceability | NIST (USA National Institute of Standards and Technology) |
| Documentation | Activity certificate, calibration date, NIST statement, AERB compliance paperwork |
| AERB classification | Sealed source — import licence and facility-registration documentation supplied |
| End-of-life | Source return service available — handled by Saxsons |
| Use across modalities | Dose calibrator constancy / accuracy · Well counter calibration · PET system reference checks |
The NIST-traceable reference behind every QA result in the nuclear-medicine department
Daily constancy, annual accuracy and linearity testing per AERB and AAPM. The four-isotope reference set covers the diagnostic and therapeutic energy span — one set serves an entire dose calibrator QA programme.
Channel calibration of a sodium-iodide well counter using the four isotopes' distinct photon energies. Establishes the energy-channel mapping and counting efficiency curve required for quantitative well-counter assays.
Co-57 and Cs-137 reference sources used for PET dose calibrator cross-checks and quantitative imaging QC where a long-lived reference of known activity is required.
A single NIST-traceable reference set used across multiple QA instruments produces inter-instrument consistency — readings cross-check against a common standard rather than drifting independently.
Accreditation standards expect documented QA against traceable references. The source certificate, in-house calibration log and decay records form the dossier accreditation inspectors look for.
When a new dose calibrator, well counter or PET system arrives, the existing reference-source set provides the immediate ground truth for acceptance testing against vendor specifications.
NIST traceability gives every QA reading an unbroken chain to the US national measurement standard. Defensible at AERB inspection, supports NABH accreditation, withstands regulatory challenge.
81 keV (Ba-133) through 1.332 MeV (Co-60) brackets every clinical photon energy used in nuclear medicine. One set, every isotope, no gaps in the QA energy coverage.
Long half-life isotopes and sealed-source construction deliver multi-year service from one set. No liquid handling, no contamination risk, no geometry drift — just repeatable reference measurements.
Manufacturer product page + Saxsons source return service. Contact Saxsons for set quotes, AERB licensing and replacement scheduling.
Manufacturer page with isotope availability, certificate examples and the gated brochure form.
Saxsons own-brand AERB-compliant source return and disposal service for end-of-life sealed sources.
QA Reference Sources
Each card opens a focused post for a specific specialty — peer-reviewed evidence and clinical workflow, written for the persona you select.
Contact Saxsons Group for QA reference source pricing, four-isotope set configuration, AERB sealed-source import licensing documentation and end-of-life return logistics across India.