The NPL2611A is a Secondary Standard Therapy Dosimetry Chamber produced by the National Physics Laboratory.
Construction of the NPL2611A chamber consists of a thin walled high purity graphite thimble, amber insulator and a hollow pure aluminum electrode and is supported by a thin walled aluminum stem. The stem terminates in a robust cable entry, by which the chamber can be mounted. A length of low noise triaxial cable connects to a TNC triaxial plug. Since the chamber is vented, air density corrections must be applied.
NE2581A Therapy Dosimetry Ion Chamber
NE2571A Therapy Dosimetry Ion Chamber