Check source MR 2802 is to be used for verification of the long-term stability of ionization chamber sensitivity.

Ionization chamber is placed inside the check source shielding container by means of the exchangeable adapter MR 2802A-*. This design makes possible to use the MR 2802 check source for various ionization chambers, while using an appropriate adapter. There is only one limitation - the outer diameter of the chamber must be smaller then 13 mm.