Coleman Model 111 Spectrophotometer

• 200-900 millimicron range • 2 millimicron bandpass

• fingertip lamp changeover • dual range phototube

SPECTROPHOTOMETER, UV-Visible, Perkin-Elmer, Coleman Model 111. Single-beam, diffrac­tion g ra t ing type, a.c. line operated, with fixed bandpass of 2 πΐμ, usable in ultraviolet range down to 200 τημ. Provides adequate resolution for routine analytical, clinical, and control applica­tions.

Phototube is dual range type covering total range from 200 to 900 τημ. Changeover from deuterium to tungsten lamp is made by fingertip lever operation. Energy recording at fixed wave­length is made possible by output at rear panel terminals. Linear Wavelength Control. Graduated in 0.5 mw divi­sions. Meter Scale. Length 5% inches. Graduated 0 to 110% transmittance and —0.04 to 2.0 absorbance. Monochromator. Grating has 1440 lines per mm and is blazed at 200 mM for high UV efficiency. Sample Compartment. Absorption cell holder takes four 10 mm light path cells with outside dimensions 12.5 χ 12.5 χ 48 mm high. Holder also takes cells with 5 mm light path or, by removing central partition, 20 mm light path cells. Compartment length allows use of cells with up to 100 mm light path. Recorder-Readout Provision. Rear panel terminals provide full-scale signal of 10 millivolts for a poten-tiometric recorder, and 1 volt for a digital voltmeter.

Performance Specifications Wavelength range 200 to 900 m„. Bandpass 2 m u throughout. Photometric linearity ±0.5% T; ±0.005 A at 0. A. Photometric reproducibility better than ±0 .1% T. Wavelength accuracy ±0.5 m u throughout. Wavelength reproducibility ±0.1 m u throughout. Cell path 5, 10, 20 mm; 100 mm maximum. Dual Light Source. Deuterium and tungsten lamps are mounted adjustably in ventilated compartment. Dimensions. Photometer, 21 χ 17% χ 8% inches high. Power supplies, 7% χ 8 ΐ χ 11 inches high. 9095-Y20. Model 111 Spectrophotometer, range 200 to 900 mw, as described. Includes deuterium lamp, deu­terium lamp power supply, tungsten lamp, tungsten lamp power supply, 4-place cell holder, set of two fused silica 10 mm absorption cells with covers, and set of two glass 10 mm absorption cells with covers. For 115 volts ±10%, 60 cycles, a .c ; 190 watts 2,200.00 NOTE—Model for 230 volts, 50 cycles available on special order.

Save time and increase accuracy by adapting the Model 111 to semi-automated procedures with Thomas Flow Cell Adapter, Flow-Through Probes, Digital Readout or Printout. See pages 980, 983-987 of Thomas Catalog 68.

Thomas

Bulletin B-326 sent upon request

ARTHUR H. THOMAS COMPANY Scientific Apparatus and Reagents

VINE STREET AT 3RD · P.O. BOX 779 · PHILADELPHIA, PA. 19105, U.S.A. Circle No. 60 on Readers' Service Card

150A . ANALYTICAL CHEMISTRY