Model: 6906/BL-643

Special Features:

Envelope material: metal; mfg. Class: tr tube contains the radioactive element cobalt 60 whose activity is 0, 7 micro ci max (equivalent to 25, 9 kbq)

Properties:

An inclosure, including two or more electrodes, in which a flow of electrons may occur through a vacuum or a contained gas. The electronic conduction takes place either by means of electrons emitted from a cathode or by ionization of the contained gas. Includes phototubes (photoemissive type only), geiger-mueller tubes, traveling wave tubes, cathode ray tubes and microwave tubes (klystron, magnetron, or the like). Excludes items whose primary purpose is to produce light energy. Also excludes photoelectric cell; and semiconductor device (as modified).