The PAM series activity meters are portable hand-held instruments intended for the measurement of surface contamination. They contain a scintillator covered with light-tight foil, with a photomultiplier and two-channel processing electronics. They are available with three detector sizes (100, 175 and 525 cm2), and multiple configurations can be chosen depending on the precise application in mind.
The meter allows the measurement of the surface contamination in two modes: continuous or pulse integration. The measured values can be displayed as count rate, or for specific selected radionuclides in units of activity, surface activity, emission and surface emission. The display shows the selected quantity digitally and/or as a bar-graph. The background radiation level can be measured manually and stored in memory, and it is then automatically deducted from the measurement results indicated on the display.
If detected contamination is higher than a pre-set threshold, a warning alarm will sound. One or two alarm levels can be set or they can be turned off. Exceeding the first or second levels is indicated by different tones. The meter can also acoustically indicate pulses generated by the detector. Dual-channel monitors distinguish between pulse detection in the alpha channel and in the beta channel by a different sound.
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Research, Radiation Safety, Medicine
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