For AA & IR you think of us. Here's something more to think about...
QUANTITATIVE ACCURACY: the optimum digital approach.
PERKIN-ELMER UV. With the new 57-series spectrophotometers, your day-to-day needs are kept firmly in mind ...while designing these instruments, we maximized quantitative accuracy wherever possible. Take derivative error, for example. Models 575, 572 and 571 feature dark cycle stepping, a system that ties the wavelength drive to the photometric measurement. This truly digital drive advances the wavelength in discrete steps and, unlike instruments which advance the wavelength continuously, it measures the ratio of sample and reference beam energy at identical wavelengths.
These same 3 models also have built-in for- The new 57 series gives you many good mat recording. This lets you vary the wave- reasons for thinking Perkin-Elmer UV...but length scanning speed at will without losing there are others. Consider the applications synchronization, so you can superimpose back up you get, the fair and forthright servrepetitive scans perfectly. Format recording ice, our one-year warranty and product also gives you digital setting of range and specialists to assist in instrument operation, zero suppression for precise ordinate pre- You've come to expect these from Perkinsentations. For more routine applications, Elmer in AA and IR...now they're yours in the lower-cost Model 570 provides similar UV, too. optical performance and is available without In all 57-series instruments, both beams are brought to an intense slit image atthe cell for unrestricted microsampling. Step-variable bandpass further optimizes quantitative reproducibility.
If you're thinking of new UV instrumentation, why not think of us? Write today for the whole story. Instrument Marketing Division, Mail Station 222, The Perkin-Elmer Corporation, Main Ave., Norwalk, CT 06856.
PERKIN-ELMER CIRCLE 3 3 O N READER SERVICE CARD
