Pb-210 Source Needle

Product Code: SE-7945


Needle source is used to generate a point source of radiation inside cloud chambers for demonstrating alpha and beta radiation tracks. A replacement part for Diffusion Cloud Chambers (SE-7943, SE-7944A).

The source is constructed by depositing a small quantity of radioactive isotope onto the eye of a standard sewing needle which is mounted on a test tube stopper for insertion into the cloud chamber. The needle and stopper are placed into a test tube for protection during shipping and storage.

The source is USNRC License Exempt (US and Canada only).  Outside the US or Canada, consult local laws and regulations.

PASCO Radioactive Source Disclaimer – Please review prior to purchase

Before purchasing PASCO radioactive sources:

Local, national, and international regulations may restrict the purchase, storage, transport, use or disposal of radioactive sources.  Please  consult your local regulations to ensure your compliance before you purchase radioactive sources.

  • PASCO advertised sources are direct shipped to customers from Spectrum Techniques (http://spectrumtechniques.com).  Please review their “Terms and Conditions” page before purchasing.
  • Once shipped, purchased sources are “Non-Cancellable” and “Non-Returnable”. Radioactive sources cannot be returned under any circumstances including “End of  Life” disposal.


  • PASCO generally advertised sources are USNRC License Exempt (US and Canada only).
  • International exempt sources (per the International Atomic Energy Agency) are  available for international customers or by request.