Ν Ε W Bausch & Lomb . . . CONSTANT bandpass... HIGH PRECISION SPECTROPHOTOMETER A SINGLE-BEAM, UV-VISIBLE SPECTROPHOTOMETER PRECISION is its n a m e . . . precision describes its performance. This outstanding instrument is exceptionally high in reliability, precision and stability. The sample compartment is large (6" χ 6" χ 8'/i6") and versatile . . . designed with all present and future accessories in mind. The instrument is easy to look at and boasts the neatest electronic packaging job you've ever seen! Accessories just plug in . . . never require "wiring-in." Unique choice of collimating or focusing optics. The fixed bandpass assures greater constant accuracy over the entire wavelength range.
NOW!
A FULL LINE
OF'CONSTANTBANDPASS'SPECTROPHOTOMETERS SPECTRONIC 6 0 0 Double-beam, double-grating, ratio-indicating. UV-visible range, 200 m^-650 m^. 3 synchronous scanning speeds—10 rmt, 50 m^, and 250 m ^ / m i n u t e and forward and reverse slewing speeds. Wavelength accuracy and bandpass are c o n s t a n t — 5 A over t h e e n t i r e range. Stray light is less than 0.5%. Send for Catalog 33-2123.
resolution
Compare these specifica tions with any other make:
SPECTRONIC 5 0 5 Double-beam, double-grating, ratio-recording. UV-visible range, 200 rry-700 ταμ. 6 built-in scanning speeds, combination light source; built-in wavelength calibration. Wavelength accuracy is 5A, pho- -.. tometric is 0.005 at 4A. Stray light — 0 . 1 % at 220 τημ, narrow, con stant bandpass-5A and 50A stand ard, 2A and 50A on special order. Send for Catalog 33-2009.
• Range—190-700 m M (to 800 n y with selected photomultiplier) • Bandwidth—.2 τημ, .5 ττίμ and 2 τημ (constant over entire wavelength) • Photometric accuracy—.3% • Wavelength accuracy—.5 m,u • Wavelength graduation—.2 m^ • Photometric scale expansion (full scale values)—100%, 1 0 % transmittance —0-2.0, .5-2.5, 1.0-3.0 absorbance
SPECTRONIC 2 0 Remarkable stability even with severe power changes. Extended range from 340 m^ to 950 m / t . Low stray light, high sensitivity at all wavelengths—even the lowest. Di rect scale readings, fast warm-up, easy interchangeability of parts. Dual ability to be a colorimeter as well as a spectrophotometer. Send for Catalog 33-2051.
• Electrical linearity—0.1% of full sensitivity on all ranges • Double grating monochromator • Noise level—less than 0 . 1 % over entire wavelength range • Light sourœ—combination(quartziodine and deuterium) with dual, transistorized power supply. Selection by turning a knob. Mercury source for wavelength calibration.
PLUS!
ALL THESE ACCESSORIES
FOR COMPLETE VERSATILITY TO MEET EVERY SPECTROPHOTOMETRIC NEED
• Power requirements—115 or 230 volts with built-in power transformer, 50 or 60 cycles A C . Send for Catalog 33-2151.
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BAUSCH & LOMB
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UV REFLECTANCE ATTACHMENT FLUORESCENCE ACCESSORY FLAME ATTACHMENT END-ON PHOTOMULTIPLIER HOUSING FLOW-THRU CELL CONSTANT TEMPERATURE CELL HOLDER
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STRIP CHART RECORDERS MICROCELL CUVETTES TIME RATE ACCESSORY TRICHROMATIC CHART PAPER TRANSMITTANCE CHART PAPER ABSORBANCE CHART PAPER TRI-STIMULUS INTEGRATOR
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DT-20 DIGITAL READOUT
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AT-20 DIGITAL READOUT
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AUTOMATIC 1 0 0 % ADJUST
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SPECULAR REFLECTANCE ATTACHMENT
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THERMOELECTRIC HEATER-COOLER
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THERMINDICATOR
For above catalogs, write Bausch & Lomb, 60927 Bausch St., Rochester, Ν. Υ. 14602.
