Three successive scans, one over the other, of the visible spectrum of a h o l m i u m oxide filter prove the repeatability of the DMR 2 1 .
One thing about the accuracy of our DMR 21 Recording Spectrophotometer: It bears repeating
For dependable accuracy and long-term stability, the double-beam DMR-21 is unmatched. Over a 185-2500 n m range, it gives you wavelength accuracies of 0.05 at 200 n m . and 0.3 at 4 0 0 n m . , with a repeatability of 0.01 and 0.1 respectively. That's because the prism and scale are mounted on one unit with no movable connection. But that's only one t h i n g . There are a number of other features that make the DMR 2 1 unique in its field. Here are a f e w : A specially-designed d r u m recorder with a 5 0 0 m m recording length, repetitive scanning with unsurpassed repeatability and easy operation. A three-point control that varies pen response down to one-half second. Half the time of other instruments. Fuily thermostated cell compartment and ceil holders, standard equipment only with Zeiss. Widest variety of cells. Maximum versatility for analytical or life s c i e n c e p r o c e d u r e s , i n c l u d i n g pushbutton selection of 10 chart speeds and 8 wavelength presentations. In fact, the DMR 2 1 has more features than we can detail here. Features that make it a complete system that will do a lot of things for y o u . And, just as important, will keep on doing them — over and over and over again. For more details, write.· Carl Zeiss Inc., 4 4 4 Fifth Avenue, New York, N.Y.10018. Nationwide service.
ZEISS
THE GREAT NAME IN OPTICS
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