28 A
ANALYTICAL
New Analytical Tools
CHEMISTRY
rugged... accurate... dependable..
VERSATILITY · ACCURACY CONVENIENCE^SPEED
LIGHT-SCATTERING MICROPHOTOMETER Measures directiy / indicates, a n d records f r o m 2 0 micro-microlL'mens t o 2 0 lumens in five d e c a d e ranges. Measures scattered light intensities a t angles from 0 ° to 1 4 7 ° ; optical transmission from 1 0 _ 9 % to 1 0 0 % ; optical density from 0 to 1 1 ; d e p o l a r i z a t i o n ; dissymmetry; absolute t u r b i d i t y ; d r o p l e t size a n d concen t r a t i o n ; purity o f colloids; rate a n d change o f molecular size; particle size a n d concentration; r a t e a n d evaluation o f a n t i g e n - a n t i b o d y reactions; micro-fluorescence; specular a n d diffuse light reflectance; enucleation; p r e c i p i t a t i o n ; flocculation; crystallization; molecular w e i g h t ; scintillation jefficiency, etc.
Hot Plates
Box
Furnaces
ÙNDBER0
BULLETIN 2202-B
PHOTOMULTIPLIER MICROPHOTOMETER
LABORATORY EQUIPMENT
For precise measurement a n d com parison of light intensities, a t selected wave-lengths, from 2 0 micra-microlumens t o 2 0 lumens, densities from Ο t o 1 1 , a n d phototube current f r o m 1 0 ~ 6 t o 1 0 - 1 1 amperes. Range can b e e x t e n d e d with neutral filters, Useful for film densitometry; colorimetry; t u r b i d i m e t r y ; fluorimetry; light scattering; scintillation efficiency o f phosphors; specular a n d diffuse r e flectivity; o p a c i t y ; glossimetry; lumi nescence; etc. Direct r e a d i n g — indicates p e r cent transmission, density, a n d photocurrent microamperes covering 5 decades without correction factors. Has outlet f o r connection to a recorder. Accommodates r e a d i l y a v a i l a b l e 2-in square filters, either single o r in combinations u p to s/a i n . thick, also many other o p t i c a l accessories. A-c. o p e r a t e d a n d s t a b i l i z e d . W e i g h s only 1 1 l b . BULLETIN
2190-B
Here's a complete line of laboratory heating equipment .
. . designed a n d built to fit
the e x a c t i n g standards of accuracy n e e d e d in precise a b o r a t o r y work.
Accuracy,
r u g g e d construction a n d
G-IO
de-
p e n d a b i l i t y a r e built into a l l Lindberg e q u i p m e n t — f r o m
HIGH-SPEED ANGLE CENTRIFUGE A r e l i a b l e , s a f e , a n d modern high speed centrifuge with unique balanc ing mechanism that assures g r e a t e r s p e e d a n d s a f e t y . R.F.C. d e v e l o p e d : 2 5 , 0 0 0 g a t full s p e e d o f 1 4 , 0 0 0 r.p.m. Tube a n g l e , 3 2 degrees. Readily interchangeable, self-balanc ing, s t a n d a r d i z e d precision-machined rotors (maximum c a p a c i t y , 4 0 0 ml.), also a v a r i e t y o f tubes a n d a d a p t e r s a r e a v a i l a b l e f o r maximum f l e x i b i l i t y . Integral control panel a n d g u a r d . Minimum servicing; low-cost mainte nance. Self-aligning mechanism reduces convection currents in the tubes to a minimum. Easily sterilized. N o need f o r f r e q u e n t lubrication. Fullya d j u s t a b l e s p e e d control. Self-contained unit construction. C a n be used in refrigerators. BULLETIN
small hot plates for l a b use.
W r i t e for complete details o n specifications, sizes a n d a p p l i cations of individual units in the Lindberg L a b o r a t o r y Line.
High Carbon
Frequency Deferm/nafor
52-Ί34-Β
Laboratory Instruments A M E R I C A N INSTRUMENT C O M P A N Y , I N C . Silver Spring, Maryland
g i a n t industrial furnaces to t h e
·
In Metropolitan Washington, D. C.
LINDBERG
LABORATORY DIVISION
2440 West Hubbard Street Chicago 1 2 , Illinois
