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U n i c a m A R 2 5 is a linear m e a s u r i n g re c o r d e r w i t h a c a l i b r a t e d range of 0 - 1 0 mV over 2 5 c m ; also v a r i a b l e over t h e range 1 1 t o 3 m V . T h e series is de s i g n e d f o r m a x i m u m f l e x i b i l i t y and ease of s e r v i c i n g a n d f o r high a c c u r a c y f o r scientific and analytical equipment. Featured are c o m p r e h e n s i v e TTL r e m o t e c o n t r o l f a c i l i t i e s . They are available in linear a n d l o g a r i t h m i c v e r s i o n s : The A R 3 5 has l i n / l o g 0—0.5 decade measur i n g c i r c u i t a n d t h e A R 4 5 has l i n / l o g 0—1.0 d e c a d e m e a s u r i n g c i r c u i t . A s i m ple push b u t t o n s w i t c h e s f r o m linear t o log scales. Basic price is $ 1 1 6 0 . Philips Electronic Instruments, Inc., 7 5 0 S. Fulton A v e . , M o u n t V e r n o n , Ν. Υ. 10550. 913-664-4500 412
ofthiQ 24p3ge Mortel booklet MODERN XRAY ANALYSES using solid state energy dispersive techniques are compared against classical wavelength dispersive spectrometers. Areas of application include Electron Microscopes, Scanning Electron Micro scopes, Microprobes, Xray Diffraction and Fluorescence, and Radioisotope Xray Excitation.
nuclear diodes inc
P.O. box 135, prairie view, Illinois 60069 Phone (312) 634-3870 Telex 72-6407
Circle No. 109 on Readers' Service Card
CARVER LABORATORY PRESS S p e e d o m a x X L 683-Series all-solid-state f l a t - b e d recorder f o r X-Y p l o t t i n g can also be i n s t a n t l y c o n v e r t e d t o X-t re cording. The X - f u n c t i o n drives t h e re c o r d e r p e n , t h e Y - f u n c t i o n drives t h e low-inertia chart beneath the pen. C h a r t span is 2 5 0 m m on each axis. A l t e r n a t e X-t o p e r a t i o n , w i t h o p t i o n a l s e l e c t i o n of 1 , 2, 3, or 1 0 c h a r t speeds, is s t a n d a r d f e a t u r e . T h e Y - f u n c t i o n is a d j u s t a b l e zero, a d j u s t a b l e range is f r o m 4 0 0 ,aV t o 1 0 0 V. Performance characteristics include accuracy of ± 0 . 2 5 % of e i t h e r s p a n ; span-step-re s p o n s e t i m e , 0.5 sec on t h e X-axis, 0.7 sec on t h e Y-axis; c h a r t s p e e d s avail a b l e f o r t h e X-t m o d e range f r o m 2 c m / h r , with accuracy equivalent to that of power-line f r e q u e n c y . Prices are from $1570. Leeds & N o r t h r u p Co., S u m n e y t o w n Pike, N o r t h Wales, Pa. 19454. 215-643-2000 413
World's most widely used press for R & D , testing compounds, laminating, shear and break tests, pilot runs, etc. New features include air operated quick-closer, constant pressure devices, complete motorization package. Capacities to 25 tons. NEW BULLETIN AVAILABLE Contains complete details and prices Send for free copy today.
FRED S. CARVER INC. 54 River Road, Summit, New Jersey 07901 a subsidiary of S t e r l i n g , I n c . Milwaukee, Wisconsin
Circle No. 27 on Readers' Service Card A N A L Y T I C A L CHEMISTRY, VOL. 4 2 , NO. 1 3 , NOVEMBER 1 9 7 0
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