PRINCETON APPLIED RESEARCH CORPORATION

Remote electrometer probe. (mounted in signal cable). • 10ηΩ input impedance. • Slewing rate: lOV/μβ. PRINCETON APPLIED RESEARCH CORPORATION...
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THE COMPLETE POTENTIOSTAT! The new PAR™ Potentiostat/Galvanostat provides more features, modes of operation and flexibility than ever before available.

• ± 1 0 0 V compliance, 1 A max. • Two independent, internal potential sources • High speed electronic potential switching

Balances. A 32-page catalog carries descriptions and photographs of the company's full line of balances, weights, and accessories. New products in­ cluded are the Dial-O-Gram Series 2000, magnetically damped, general purpose lab balances with dial-vernier readout to 0.1 ^g, and the Model 6010PC, a moisture determination bal­ ance designed for pollution control. Ohaus Scale Corp., 29 Hanover Rd., Florliam Park, N . J . 07932 601

• Remote electrometer probe (mounted in signal cable) • 10ηΩ input impedance • Slewing rate: lOV/μβ

Fluoride Ion Analyzer. Bulletin 4102, 8 pages, describes the principle of op­ eration, electronic circuitry, and appli­ cations of the Model 900F fluoride ion analyzer. The instrument is designed for continuous measurement and con­ trol of fluorides in potable water and water pollution. Beckman Instru­ ments, Inc., 2500 Harbor Blvd., Fullerton, Calif. 92634 602

Plug-in modules provide maximum flexibility in readout. Positive feed­ back IR compensation, high current m e a s u r e m e n t and galvanostatic capabilities up to 1 A are available. The Model 173 replaces a potentiostat, two voltage sources and a current-measuring device. Price of the Model 173 is $2200 including probe. Digital version, $2560. Current readout module, $145. I-E converter, $550. 100 raA output ver­ sion less than $2000. For more data, contact Princeton Applied Research Corp., Box 565, Princeton, N.J. 08540; telephone (609) 452-2111.

PRINCETON APPLIED RESEARCH CORPORATION Circle No. 150 on Readers' Service Card

COLUMBIA

SCIENTIFIC

INDUSTRIES

STONE-PREMCO INSTRUMENTATION TOTAL THERMAL ANALYSIS DTA -

EGA -

TGA - DSC - Derivative DTA/TGA 26 Basic Models Capabilities:-! 60 C to 1600 C.10 " Torr. to 3 0 0 0 P.S.I.

MANUFACTURERS' LITERATURE

112

Pressure Transducers. A guide for the use of pressure transducers, 32 pages, covers in detail how to establish pres­ sure transducer specifications, testing pressure transducers, preferred circuits, practical considerations and precau­ tions, and other information necessary for the successful use of these devices. Computer Instruments Corp., 92 Madi­ son Ave., Hempstead, Ν. Υ. 11550 603 Optical Components and Accessories.

Catalog C-5, 36 pages, contains com­ plete specification and price informa­ tion on optical filters, custom filters, mirrors, and other elcctrooptical and optical products. Baird-Atomic, 125 Middlesex Turnpike, Bedford, Mass. 01730 604

CSI

Stone System

CSI

TGA System

CSI - Premco System

Model 7 0 0 X-Ray Fluorescence Analyzer Elemental Analysis -Calcium to Uranium Detectable Limit Down to—0.01%-1 5 Second Test FOR ADDITIONAL LITERATURE-WRITE OR TELEPHONE COLUMBIA SCIENTIFIC I N D U S T R I E S A S I Division, P. O. Box 6 1 9 0 , Austin, Texas 7 8 7 0 2 512-926-1530 Circle No. 34 on Readers' Service Card

102 A .

ANALYTICAL CHEMISTRY, VOL. 43, NO. 1, JANUARY 1971

Residual Gas Analyzers. An 8-page brochure describes two compact resid­ ual gas analvzers, the EAI QUAD 1100 and the new QUAD 1110 with built-in oscilloscope. Each system has a mass range from 1 to 300 atomic mass units. Varian, 611 Hansen Wav, Palo Alio, Calif. 94303 605 Liquid Scintillation System. A 4-page bulletin, 7191, provides full specifica­ tions for the LS-230 liquid scintillation system, giving details of special fea­ tures, such as the bidirectional sample changer, quench correction method, and readout options. Beckman Instru­ ments, Inc., 2500 Harbor Blvd., Fullerton, Calif. 92634 606