VOLUME
2 4,
NO.
6,
JUNE
35A
1952
ONE
INSTRUMENT
FOR
THE
Ultraviolet Visible Infrared Range
FARRAND
DOUBLE
MONOCHROMATORandSPECTROMETER ΖΕ,/-\
LUMETRON Colorimeter Mod. 450 for Nessler Tubes
It is now possible to make spectral measurements in the ultra-violet, visible and infrared regions throughout the range of 0.2 to 35 microns—WITH A SINGLE INSTRUMENT by simply interchanging prisms. The optical system comprises a double monochromator thereby reducing scattered radiations to a negligible magnitude. Highest spectral purity—Isolation of extremely narrow wave lengths and greatest resolution are obtained in any one chosen region by selection of prism material for optimum performance.
A new photoelectric instrument of high accuracy for the measurement of pale colors and faint turbidities. * For all analytical colorimetric determinations in which only a slight coloration can be developed. * For sanitary examination of drinkable water and for analysis of water for municipal and industrial purposes. * For color standardization of lightly colored liquids such as kerosenes, sugar solutions, solvents, varnishes, liquid waxes, vegetable oils, beverages, cosmetics. * Replaces visual color comparison in Nessler tubes.
BULLETIN #806 ON REQUEST
I PRECISION OPTICS, ELECTRONIC AND SCIENTIFIC INSTRUMENTS
Write for literature to
PHOTOVOLT CORP. 95 Madison Ave.
3000° F. COMBUSTION TUBE FURNACE
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FARRAND OPTICAL CO f„
