THE NEW PACKARD NARROW CONSOLE AUTOG A M M A ® SPECTROMETER SYSTEM FEATURES A 100 SAMPLE CAPACITY WITH CONSTANT BACKG R O U N D . , .attained by means of a patented sample changer w h i c h locates the test tubes peripherally around the lead-shielded, well-type detector. Because the distance from detector to each sample remains constant, background remains constant even when "hot" samples are located adjacent to samples with little or no activity. Another unique feature of the Model 4 0 2 AutoGamma Spectrometer is a narrow window and expander amplifier c i r c u i t r y w h i c h assures s t a b i l i t y of the discriminators at window settings as small as 1% of full scale. The narrow window allows the operator to examine a small segment of the spectrum, define true photopeaks more accurately and decrease calibration time significantly. For manual operation choose the Model 410A AutoGamma Spectrometer and a well-type s c i n t i l l a t i o n detector. By adding a sample changer, automatic control unit and a digital printer, automatic operation will free your personnel of routine sample-handling and data recording chores. For a complete technical description of Auto-Gamma S p e c t r o m e t e r S y s t e m s , call y o u r Packard Sales Engineer or write for Bulletin AD-1004. PACKARD INSTRUMENT COMPANY, INC. BOX 428 LA GRANGE, ILLINOIS HUnter 5-6330
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