varian techtron's uv/visible spectrophotometers the m* 635 series
four ways better SIMPLICITY Al! controls are con veniently located on the front panels. Readout mode, damp ing, zero offset and scan speeds are all push button selected. Very simple, yet very convenient.
VERSATILITY The very large sample compartment (11.5 x 12.7 χ 22 cm) is accessible through removable top, front and base panels and accom modates a wide range of standard and special sample equipment. Beam separation is 11 cm. High energy sources and a wide range photomultiptier tube provide a wavelength range of 180-850 nm. The 635 gives ranges of 2 , 1 , 0.5 and 0.1 absorbance, 0-100 % T , and concentration on a large, easily read meter. The digital version, the 635D, presents abs., % T and concentration on a four digit readout. BCD output too. Coupled entrance and exit slits give spectral bandwldths of 2,1,0.5 and 0.2 nm. Great for routine work or research.
PERFORMANCE
RELIABILITY
Wavelength repro All solid state elec ducibility is better tronics mounted on than 0.25 nm„ photo three replaceable metric reproducibility circuit boards. better than 0.25 %T. Reliable? It's backed The unique energy conserving up by a full 2-year warranty. chopper system gives continuous correction of It is no exaggeration to say dark current changes — there that "The 635 Series" sets a Is no need to adjust 0%T substantially higher standard level. Zero drift is less than for low-cost UV-Visible 0.002 abs/hour. Gives the instruments. highest performance ever in a low-cost double beam system.
CIRCLE 217 ON READER SERVICE CARD
varan techtron Pafo Alto, California, U.S.A. Zug, Switzerland Maiton, Ontario, Canada Springvale, Victoria, Australia
