The Activator, Volume 1, Number 8, May 1945 Page: 167
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BECKMAN MODEL IR-2
INFRARED SPEC TROPHOTOMETER
A rugged new model for general organic analysis of gases, liquids or solids,
offering accuracy, stability, and simplicity and speed of operation
INFRARED SPECTROPHOTOMETER, Beckman Model IR-2. Incorporates the following
Direct Wavelength Settings. Dial A reads directly in microns with scale 1 meter
long. Wavelength range 0.546 to 15 microns. Wavelengths can be selected
either by manually operated continuous wavelength drive A or by 17-
position stop mechanism G.
Direct Readings. Light transmission values are obtained directly in percent
transmission or optical density on scale C of a precision slide wire potenti-
ometer with balance indicated on meter D.
Constant Radiation source is a photo electronically stabilized Nernst glower.
Bolometer with Amplifier. Radiation is measured by a special bolometer in housing
E with vacuum tube amplifier. This system eliminates zero drifts, non-
linearity errors and vibration difficulties.
Sample Holders. Compartment H is fitted with twin 10 cm gas cells for standard
and unknown; removable compartment K takes liquid cells, solid specimens
or gas cells.
Constant Temperature fluids can be circulated through monochromator and cell
9107-D. Spectrophotometer, Infrared, Beckman Model IR-2, as above described, consisting of mono-
c(hronlator with rock salt prism and two precision slits B, Nernst glower source,
bolometer and amplifier, filter slide J with MgO and LiF filters. 10 cm twin gas
cells, and compartment K, 25 mm, for liquid and solid samples but without cells.
'For 110 volts, 60 cycles, a.c ....... . .. ................. ........... ............. $3,600.00
Detailed descriptive pamphlet sent upon request.
ARTHUR H. THOMAS COMPANY
LABORATORY APPARATUS AND REAGENTS
WEST WASHINGTON SQUARE
Cable Address "Balance," Philadelphia
PHILADELPHIA 5, U. S. A.
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American Chemical Society. Dallas/Fort Worth Section. The Activator, Volume 1, Number 8, May 1945, periodical, May 1945; [Dallas, Texas]. (digital.library.unt.edu/ark:/67531/metadc67672/m1/7/: accessed September 19, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; .