Packard
Instruments
H Liquid Scintillation Spectrometers
1 υ
% Automatic Fraction Collectors % Windowless and Flo-Window Counters TRI-CARB LIQUID SCINTILLATION SPECTROMETERS For counting Tritium, Carbon-14 and other beta emit ting isotopes. Provides the most simple and convenient method for precise counting of beta sam ples that go into solution with liquid phosphors. Aqueous samples of vari ous types may also be readily counted. Certain materials that are not soluble in liquid phos phors may be counted in suspensions.
Request Bulletin 314
AUTOMATIC
The most exacting needs of laboratories throughout the world are most eminently and successfully met by Vitreosil ware (pure fused silica) produced to the high est standards of quality.
FRACTION COLLECTORS *
Basic to Dependable Lab Ware-VITREOSIL®
For precise column chroma tography. Provides both time and drop counting. Can be fur nished for time o p e r a t i o n only a t commensurately low er cost. Drops from column fall di rectly into test tubes. There are no intermediate collect ing vessels, glass arms, or funnels to cause mixing, contamination, evaporation, etc. This is important where accurate separations are required or where radioactive tracers are used.
Request Bulletin 230
WINDOWLESS AND FLO-WINDOW COUNTERS Both types can be used for Geiger and proportional op eration. Windowless Flow Counter, Model 200A, provides m a x i m u m sensitivity for counting solid sam ples which emit very soft radiations. Has essentially unlimited life. Physi cal arrangement of sample in cham ber makes it possible to achieve full 2 /i" geometry. Flo-Window Counter, Model 210, features a very thin metalized window of Du Pont Mylar which offers a mini mum of obstruction to low energy radiation. Isolates counting chamber from sample. Eliminates static charge, vapor effects, accidental contamination, etc.
Chemical purity, high re sistance to heat shock, un usual electrical resistivity, best ultra-violet transmis sion (in transparent quali ty) and low initial cost com pared to platinum are some features of Vitreosil fused quartz. In addition to our unusually large stock of transparent and opaque, including glazed and unglazed cruci bles, evaporating dishes, beakers, tubing and rods in all diameters and sizes, we offer prompt fabrication of special items. Write today, giving full details of your re quirements or ask for illustrated bulletin. THERMAL AMERICAN FUSED QUARTZ C O . , INC. 18-20 Salem Street, Dover, N e w Jersey
Request Bulletin 200
Please send illustrated bulletin or informa tion on
Company. Name
Packard
Instrument
Company
DEPT. D · P. O . B O X 4 9 · . LA G R A N G E , ILL. For further information, circle numbers 21 A-1, 21 A-2, 21 A-3 on Readers' Service Card, page 63 A
VOLUME
2 8, N O . 4, A P R I L 1 9 5 6
_Title_
StreetCity
-Zone
State-
Circle No. 21 A-4 on Readers' Service Card, page 63 A
21 A
