Turner Model 330 Spectrophotometer

m takes Thomas 10 mm Flow Cell Adapter and Flow-Through Probe for semi-automated procedures*

SPECTROPHOTOMETER, Turner Model 330. Diffraction gra t ing monochromator provides fixed 10 ιημ bandwidth. Solid-state a.c. power supply and ampli­fier. Meter reads in absorbance and transmit tance. Photometric accuracy ± 1 % T ; repeatability ±0 .25%. Visible Range model covers 335-710 ιημ range.

Stray light is held to less than 0.5%. Narrow bandwidth and low stray light result in resolution superior to that provided by instruments of comparable price. Useful for clinical and other routine testing. Sturdiness and sim­plicity of operation make the instrument suitable for industrial and educational use.

Setting of 100% Τ is accomplished by adjusting voltage input to tungsten lamp; feedback regulator circuit en­sures stable performance. Output signal of 1 volt is pro­vided for recorder or external readout. Wavelength range can be extended to 1000 ιημ by substitution of plug-in, near-IR photodiode, offered as accessory. Ultraviolet lamp is available to extend range to 210 ιημ; information on request.

Sample holder takes cuvette 13 mm o.d. χ 100 mm long. Holder for cuvettes 19 mm χ 105 or 150 mm, is offered separately. Cuvettes not supplied.

Thomas Accessories for Model 330 Roto-Cell®. The Model 330 can be adapted for rapid scanning by means of the Thomas 9085-C51 Roto-Cell, a 2-place water-j acketed cell carrier. Sample and blank are interchanged instantly within the instrument by turning a knob. Flow Cell. Thomas 9085-F50 Plow Cell Adapter adapts Model 330 to semi-automated procedures. Takes 0.25 ml cell with. 10 mm light path. 9090-B10. Spectrophotometer, Visible Range Model 330, as described. Range 335 to 710 πιμ. With 3-wire cord and plug for 100 to 130 volts, 48 to 65 cycles, a .c ; 50 watts. . .595.00

*Save time and increase accuracy by adapting the Model 330 to semi-automated procedures with Thomas Flow Cell Adapter, Flow-Through Probes, Digital Readout or Printout. See pages 974, 976, 983-987 of Thomas 1968 Catalog.

Detailed bulletin 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. 81 on Readers' Service Card See ACS Laboratory Guide for All Products/Sales Office

118 A . ANALYTICAL CHEMISTRY

• 210-1000 millimicron capability

• 10 millimicron bandwidth

• fakes Thomas Roto-Cell for rapid 2-cell scanning