NEW PRODUCTS Nickel-63 Ionization Sources Nickel-63 electroplated onto gold or platinum is superior in performance to the more widely used tritium sources for high-temperature electron-capture gas chromatography. It is a pure low energy beta emitter which will not volatilize, wipe off, or fluctuate in ion current output at temperatures up to 400° C. New England Nuclear Corp., 575 Albany St., Boston, Mass. 02118 427
SIEMENS
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SRS;1 ^--\ Beam Condenser Model 128 offers low energy loss, un limited spectral range, and no fogging as with hygroscopic refracting lenses. The instrument produces strong spectra from samples as small as 1.5 mm and provides a 3 to 1 image reduction; and fits all Beckman, all Perkin-Elmer, and the Unicam SP-200 IR spectropho tometers. Barnes Engineering Co., 30 Commerce Rd., Stamford, Conn. 06904 428
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Temperature Calibration Bath Model TH-050-C uses dry, safe, air fluidized solids as the heat transfer me dium. It is available in any tempera ture range within ambient to 550° C. Maximum temperature gradients within the calibration zone are ±0.2° Γ while clear volume of the zone is 6.5 inches in diameter by 10 inches deep. Procedyne Corp., 221 Somerset St., New Bruns wick, N. J. 08903 429
COUNTING AND
DETECTING EQUIPMENT Water-cooled 5c.nt.llat.0n counter? , Water-cooled flow counter. Window th.ckness of flow
Specific Gravity Measurements Martin densitron temperature de pendent density gradient offers the ad vantages of being able to change range conveniently, to home-in automatically, or to separate mixtures of substances of differing densities. Precision is 1 X 10~° in substances ranging from 0.79 to 4.0 specific gravity units. Argo Scien tific Corp., P. O. Box 36, Newton High lands, Mass. 02161 430 Germanium Detector Coolers Stainless steel insertion type dewar, for use in a germanium detector sys tem, helps attain higher resolution and linear response. It cools the detector to LN 2 temperature and operates with a preamplifier, amplifier, and multi channel analyzer, or computer. The detector section can be removed and replaced without breaking the vacuum in the main dewar. Capacity is 25 liters. Holding time is 10 to 12 days. Sulfrian Cryogenics, Inc., 391 E. Inman Ave., Railway, N. J. 07065 431
X-RAY SPECTROSCOPISTS: Before you analyze—analyze
!
T H I S FREE CHART enables you to compare the 77 key features of any Spectroscopy sys tem. With the chart you'll receive valuable material on x-ray fluores cence analysis of elements F to U, x-ray periodic chart, informa tion on automation of x-ray spectrometer.
SEND FOR YOUR COPY TODAY on Readers' Service Card
SIEMENS AMERICA INCORPORATED MEASURING INSTRUMENTS DIVISION 350 Fifth Avenue, New York, N.Y. 10001 Visit us at the Pittsburgh Conference Circle Να. 1 on Readers' Service Card
VOL 40, NO. 2, FEBRUARY 1968
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