Ionisation chamber from Veenstra VDC-202 radioisotope dose calibrator, used in nuclear medicine to determine the exact activity of a radioactive dose administered to patients, used at the Chelsea & Westminster Hospital between 1993 to 2018, made by Veenstra, 1993. Ionisation chamber from Veenstra VDC-202 radioisotope dose calibrator 1993
Ionisation chamber radiation detector, type BF3, unsigned, British, 1950-1975 BF3 Ionisation chamber 1950-1975