NEW PRODUCTS Microscope Photometer The microscope photometer (MPM) can be attached to several standard mi croscopes. The unit can measure areas in the object plane as small as 0.5 mi cron in diameter. The MPM measures transmission, absorbance, or reflectiv ity of microscopic specimens with transmitted or reflected light across the entire visible spectrum, using an inter ference filter wedge monochromator. Ultraviolet accessories are being de veloped. Carl Zeiss, Inc., 444 Fifth Ave., New York, Ν. Υ. 10018 4 2 7 Stress/Strain Testing Machine
instant chemistry Here's a new idea in nondestructive chemical analysis: fast, accurate and virtually foolproof. Using a low-level (one millicurie) gamma ray source to excite t h e sample, T M C ' s new Photon Spectrometer simultaneously identifies the component elements b y measuring the energy and intensity of the secondary X-rays produced. T h e entire analytical process is completely automatic from t h e time a sample is presented to t h e system until final readout. A n d speaking of readout, we know of no other spectrometer that offers as wide a range of analog a n d digital outputs: oscilloscope display, X-Y plotting, printed or punched paper tape a n d computer-compatible magnetic tape. If you're interested in a faster, easier, more economical technique for analysis of elements, check these capabilities against your requirements: • High speed — thirty seconds or less for heavy elements. •
Analyzes solid, g r a n u l a r or liquid samples.
• Nondestructive analysis — no loss or degradation of sample. • Simultaneous assay of all elements heavier t h a n calcium — readily identifies both known a n d unknown constituents. • Low cost per assay — negligible installation costs (simply plug into 110 volt l i n e ) , low power consumption, no chem ical reagents, no complex sample preparation. • Portable — low power consumption permits battery-powered field operation. • Pushbutton operation — n o special training required to oper ate system or to interpret results. Typical applications for the Photon Spectrometer include on-line process control, geological surveys, quality control a n d mining assays. W h y not add your application to this list? For complete information contact: Technical Measurement Corporation, 441 Washington Avenue, North Haven, Connecticut 06473. TECHNICAL MEASUREMENT CORPORATION Circle No. 152 on Readers' Service Card 118 A
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ANALYTICAL CHEMISTRY
See ACS Laboratory Guide for All Products/Sales Office
A 50,000-pound capacity, universal testing machine evaluates the stress/ strain properties of materials, including strain rate sensitivity, complex modu lus, work hardening, crack propagation, and high rate formability. Machine "stiffness" is approximately 106 pounds/inch; frequency bandwidth is 30 cps. Overall system accuracy is ± 0.5% of indicated load or ± 0.25% of recorded scale in use, whichever is greater, for all load ranges. Instron Corp., 2500 Washington St., Canton, Mass. 02021 428 Modular Computer System Programmed by Algebra The Series 4000 is a completely mod ular on-line computer system which can be expanded without modification tc include up to 32 modules. The system is programmed by algebra, not Fortran. I t features dual, individuallyaddressable accumulators, plus direct, digital logarithm generator and register. Available modules include on-line digi tal arithmetic units, keyboards, core storage assemblies, program input sources, and accessories, as well as a variety of compatible instruments in cluding scanners and input devices. Wang Laboratories, Inc., 836 North St., Tcwksbury, Mass. 01876 429
Laser Modulator The Model 10 laboratory laser light modulator has an operating bandwidth of from 1 Hz to 100 MHz. The in strument is a multiple-crystal device which operates at low modulation volt ages; it compensates for normal changes in ambient temperature. Ex tinction ratios of 100 to 1 and higher have been achieved in tests with both sheet and glan polarizers in a 2-mm diameter He-Ne laser beam. Beckman & Whitley, Inc., 441 N. Whisman Rd., Mountain View, Calif. 94040 430 Circle No. 134 on Readers' Service Card
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