NPL2611A Ion Chamber

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.


Please note: This chamber is manufactured at the National Physical Laboratory (NPL), in the UK, and support, both in terms of maintenance and calibration, are available from NPL directly.

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