Berthold contamination meter type LB1210B

This instrument is a well designed, well constructed contamination monitor that has unusual versatility. Where large surface areas require to be monitored it is particularly useful because of the large area of the detector. It is suitable for monitoring β surface contamination of energy equal to and above that of 14C, and for X- and low-energy γ-emitting nuclides. It has an adequate battery life, good temperature stability, comprehensive but simple controls, and a clear and accurate meter. A useful check source is provided. The only criticisms of the limitations of the alarm warning, the rather quiet click for each event detected, the rough surface finish, and the effects of high humidity. (author)