CEC announces the next generation of mass spectrometers. The Single Focusing 21-490 • 4-inch, 90° s e c t o r • M a s s range, 12-1000 • R e s o l u t i o n , 600 or 1100 ( 1 0 % v a l l e y ) • Scan s p e e d s t o 1 s e c / d e c a d e • Includes t o t a l i o n i z a t i o n , e l e c t r o n m u l t i p l i e r , batch i n l e t , d i r e c t probe • Readily c o n v e r t i b l e t o 21-491
The Double Focusing 21-491 Same features as the 21-490 plus: » Electric sector • Resolution to 2500 (10% valley) • Differential pumping
Why the next generation? C o m p u t e r - a i d e d d e s i g n of t h e analyzers p r o v i d e s s i g n i f i c a n t l y higher p e r f o r m a n c e at a s i g n i f i c a n t l y l o w e r p r i c e t h a n any o t h e r c o m m e r c i a l mass s p e c t r o m e t e r . Both i n s t r u -
See us at the Pittsburgh Conference—Booth 226-229 Cleveland Auditorium March 3-7.
m e n t s are available w i t h gas c h r o m a t o g r a p h and i n t e r f a c e , as w e l l as a f u l l l i n e of a c c e s s o r i e s . Either i n s t r u m e n t o c c u p i e s 11 square f e e t of l a b o r a t o r y space. Prices
C E C / A N A L Y T I C A L INSTRUMENTS
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under $20,000. For c o m p l e t e i n f o r m a t i o n call y o u r n e a r e s t CEC Field Office or w r i t e CEC/Bell & Howell,Pasadena,Calif.91109. A s k f o r B u l l e t i n K i t 3337-X1.
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ANALYTICAL CHEMISTRY
BELL & HOWELL Offices in Springfield,Va, Atlanta,Cleveland, Dallas, Denver, Des Plaines, Houston, Los Altos, Needham Heights, Pasadena, Philadelphia, Springfield, N.J. Circle No. 94 on Readers' Service Card
