12A
ANALYTICAL
BECKMAN Model
Infrared
CHEMISTRY
IR-2
Spectrophotometer
The M o d e l IR-2 I n f r a r e d S p e c t r o p h o t o m e t e r is unsurpassed
l i n e a r d e t e c t i n g a n d a m p l y f y i n g system not subject t o u n -
f o r a c c u r a c y , c o n v e n i e n c e , a n d o v e r a l l usefulness in r e s e a r c h
controlled fluctuation in sensitivity.
investigations, a n a l y t i c a l l a b o r a t o r y d e t e r m i n a t i o n s a n d f o r
The instrument's f u n d a m e n t a l design is similar to t h a t which
the continuous a u t o m a t i c control o f p l a n t streams.
has p r o v e n so successful in the w e l l - k n o w n Beckman M o d e l
Many
d e s i g n f e a t u r e s contribute to the convenience
D U Q u a r t z S p e c t r o p h o t o m e t e r . The m o d e l IR-2 is constructed
and
s p e e d o f o p e r a t i o n o f the I R - 2 : Elimination o f z e r o d r i f t a n d
of
non-linearity t h r o u g h the use o f c h o p p e d r a d i a t i o n a n d a n
a s s e m b l e d . A r u g g e d , s e a l e d monochromator mounted in a
separate
units which a r e
easily
assembled
and
dis-
a - c a m p l i f i e r ; minimized s t r a y e n e r g y b y a d v a n c e d o p t i c a l
steel housing is the p r i n c i p a l unit. To this a r e a t t a c h e d t h r e e
d e s i g n a n d e m p l o y m e n t o f a f i l t e r - b e a m c h o p p e r ; construc-
other units in the s t a n d a r d instrument; the light-source c o m -
tion in s e p a r a t e c o m p a r t m e n t s , m a k i n g the IR-2 the most
p a r t m e n t , the gas-cell a n d e n e r g y r e c e i v e r
a d a p t a b l e instrument a v a i l a b l e ; I n c o r p o r a t i o n o f a turret-
a n d the liquid-cell c o m p a r t m e n t . Because other units such as
compartment,
stop mechanism f o r quick, a c c u r a t e setting t o p r e d e t e r m i n e d
special r a d i a t i o n sources or receivers, or d i f f e r e n t cells a n d
w a v e lengths; collimation o f the r a d i a t i o n b e a m so t h a t the
cell c o m p a r t m e n t s c a n b e a t t a c h e d as d e s i r e d , the instrument
focus is u n a f f e c t e d b y substituting special cells of various
is r e a d i l y a d a p t a b l e t o s p e c i a l i z e d measurements a n d t o
lengths; direct c a l i b r a t i o n o f the m o n o c h r o m a t o r in w a v e -
the c h a n g i n g requirements o f r e s e a r c h a n d p l a n t control.
length units to e l i m i n a t e conversion charts; d u a l g a s cells
2 p e r cent a t 15 microns; e x c e l l e n t r e p r o d u c i b i l i t y o f slit a n d
MODEL IR-2S SPECTROPHOTOMETER. Comprised of three units; the instrument assembly with sodium chloride optics, the electronic amplifier, and the power supply for use on 115-volts, 60-cycles. The instrument is assembled with monochromator and three integrally attached units: the energy receiver compartment with thermocouple, the liquid cell compartment, and the light source compartment with phototube regulator, beam chopper and auxiliary metal fixed gas cell, approx. 27-cm. Other cells listed separately. Direct reading wavelength scale 1.0 to 15.0 microns. Shipping weight 4 0 0 lbs $4650.00
w a v e l e n g t h settings; constant e n e r g y output o f the source;
Contact Harshaw for all Beckman Instruments
independently
filled
a n d positioned without r e m o v a l f r o m
their c o m p a r t m e n t . The Beckman M o d e l IR-2 excells in p e r f o r m a n c e : precise r e p r o d u c i b i l i t y o f transmission m e a s u r e m e n t s ; high resolution o f b e t t e r t h a n 3 cm-' a t 1 0 microns; r e d u c t i o n o f stray light t o less t h a n 1 p e r cent a t 14 microns a n d t o less t h a n
See this instrument ference
on Analytical
demonstrated Chemistry
in Booths
March
5-6-7,
Spectroscopy.
1952
Wm. Penn
at the Pittsburgh Hotel,
Pa.
Houston ι · -
R
3237 =>· v
,„
6622 SUOPW «
rf|S^
CO.
Con-
Pittsburgh,
SSïfe-A
HARSHAW SCIENTIFIC D I V I S I O N O F THE H A R S H A W CHEMICAL CLEVELAND 6, O H I O
18-19,
and Applied
.
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