The best in speed, presentation, resolution and automatic operation at its price. The Model 457IR Spectrophotometer. Here is fully automatic scanning and wide spectral range, from 4000 to 250 cm-'. Chart presentation is continuous and linear. The flowchart recorder and monochromator are positively synchronized—frequency cannot be mis-set. After each scan you're ready to go on to the next with pushbutton e a s e —the pen lifts automatically at stop and drops back down to the chart at go. Stays in calibration spectrum after spectrum. Lets you handle more problems easier and faster. The Model 457 features three scanning s p e e d s , resolution of 1 cm-' at 1000 cm- 1 , seven slit programs, 2.5x and 10x abscissa expansions and the convenience of visual mode and frequency indicators.
In every way, the Perkin-Elmer Model 457 combines high performa n c e and e a s e of operation with w i d e r a n g e . It's a t i m e and money saver. For our complete, informative
Circle No. 104 on Readers' Service Card
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ANALYTICAL CHEMISTRY, VOL. 42, NO. 8, JULY 1970
brochure on the Model 457, write: Instrument Division, Perkin-Elmer Corporation, 702 Main Avenue, Norwalk, Conn. 06852.
PERKIN-ELMER
