EXPOSITION

Model 81

Major Features

• 2 independent input cnannels which simultaneously record full scale.

• Recorder charts channels 1 and 2 alternately at 1 second intervals.

• Trace identification eliminates con­fusion when traces cross.

• Calibrated volt and ampere ranges for each channel : 10 mv. 1 /ta. 0.1 v. 10 μα. 1 v. 0.1 ma. 10 v. 1 ma. 100 v. 10 ma.

• Continuously variable adjustment be­tween ranges.

• Char t speeds of 2 in . /hr . and 30 in. /hr . Optional speeds of 4, 6, 12, 20, 24 and 60 in. /hr . provided by a simple gear change.

• Weighs only 14 lbs. 9Vi" χ 5Vi" χ 7".

Get c o m p l e t e spec i f ica t ions f r o m y o u r Y S I d e a l e r or w r i t e :

YELLOW SPRINGS INSTRUMENT CO., INC.

Yellow Springs, Ohio

Circle No. 172 on Readers' Service Card

9 4 A · ANALYTICAL CHEMISTRY

GENERAL ELECTRIC CO. X-Ray Department 4855 Electric A v e . Mi lwaukee I , Wis.

Exhibiting: X-ray emission spectrometers for chemical analysis including: Heinrich miniature probe for small spot analysis. New No. 3 S. P. G. X-ray detector in­cluding improved scaler, linear, and loga­rithmic rate meter, long range non-over­loading pulse amplifier and pulse height selector, preamplifiers for proportional and scintillation counters, and a well regulated power supply.

GOW-MAC INSTRUMENT CO. 100 Kings Rd. Madison, N. J.

Exhibiting: Hot wire filaments including new Teflon-clad tungsten for halogen, detectors for VPC including gas density detector for high temperature, micro cell for capillary and 1/8" packed col­umns; temperature controlled cells; power supplies.

THE EMIL GREINER CO. 2 0 - 2 6 North Moore St. N . Y. 13, Ν. Υ.

Exhibiting: Glove boxes, manostats, standard taper clamps, new McLeod gauge, Cartesian manometer, Chromerge, Aquet, new Pipettor, microtitrator, cir­culating bath.

HARSHAW SCIENTIFIC Div. of the Harshaw Chemical Co. 1945 East 971 h St. Cleveland 6, Ohio

Exhibiting: Recording spectrophotometers, analytical balances, electro thermal melt­ing point apparatus, YSI recorder, vac­uum pumps, pH meters, hot plates, Cole­man nitrogen analyzer, ion exchange resins, laboratory furniture, and other new equipment for the analytical laboratory.

HUNTER ASSOCIATES LABORATORY, INC. 5421 Breir Ridge Rd. McLean, V a .

Exhibiting: New distinctness-of-image glossmeter to measure mirror quality of high-gloss surfaces of paint, plastics, and paper; Hunterlab D25 color and color difference meter with direct-reading color difference computer attachment. 1)40 reflectometer for whiteness, reflectance, yellowness, opacity, and optical brightener evaluation. D16 multipurpose gloss-meter for accurate gloss measurements at 20°, 45°, 60°, and 75° conforming to ASTM and TAPPI methods.

THE HYPREN CO. 2221 Fifth Ave. Pittsburgh 19, Pa.

Exhibiting: Kromo-Tog, Model K-7 featuring thermionic emission ionization detection and flame ionization detection for chromatographic analvsis; Kromo-Tog Model K-2; Stanton Ultramatic UM3 single pan balance: Burrell-Severs ex­trusion rheometer, Model A-120. Equip­ment will be set up and operating.

JARRELL-ASH CO. 2 6 Farwell St. Newtonville 60 , Mass.

Exhibiting: Ebert convertible spectrograph, compact Atomcounter, direct reader,

recording comparator microphotometer, concentrational computer, modular and capillary chromatographs, chromato­graphic accessories, fiuorometers, dis­solved oxygen analyzer, microfocus x-ray unit, assortment of x-ray cameras and accessories.

KIMBLE GLASS CO. P. O. Box 1035 Toledo 1 , Ohio

Exhibiting: Expanding line of laboratory glassware having stopcocks with Teflon plugs, square volumetric flasks, and Kimax boiling flasks; clinical apparatus will include Kimax pipets, centrifuge tubes (standard and heavy duty), and culture and test tubes.

LABLINE, INC. 3 0 7 0 - 8 2 West Grand Ave . Chicago 22, I I I .

Exhibiting: Lourdes Versa-Fuge, a versatile bench-type centrifuge combining the func­tions of continuous flow separation and preparative t3'pe separation, lightweight and portable; the Model 61 general purpose shaking bath for all lab conditions requiring controlled shaking and constant temperatures; Com-Pac Cab, an en­vironmental cabinet with temperature range of - 1 2 0 ° F. to -1000° F., a versa­tile test cabinet in 2 cu. ft. and 5 cu. ft. capacities.

LABORATORY EQUIPMENT CORP. Hilltop Rd. St. Joseph, Mich.

Exhibiting: New automatic vacuum fusion analyzer for determination of hydrogen, oxygen, and nitrogen, compact bench top instrument for highly accurate and com­pletely automatic analyses of metal samples; Leco high frequency induction furnace with automatic carbon determi-nator and automatic sulfur titrator; new standard samples for calibration and standardization of carbon and oxygen analysis equipment.

ARTHUR S. LA PINE & CO. 6001 South Knox Ave . Chicago 29 , II I .

Exhibiting: Holsi microchemical apparatus, LaPine clamps, Leybold atom models, Leybold lattice models, Leybold vacuum pumps, Calm recording electrobalance, Collectochrom, spectrophotometer DB & DK2, gas chromatograph, clinical pipetter and other A. S. LaPine specialties.

E. LEITZ, INC. 468 Park Ave . South N. Y. 16, Ν. Υ.

Exhibiting: Infrared spectrograph, Ortho-lux research microscope, Aristophot I I I photomicrographic camera with Polaroid 4" χ 5" film holder, Panphot research photomicrographie microscope, Metallux phase microscope.

KURT J. LESKER CO. AMERICAN BALANCE CORP. 4535 Veman Ave . Pittsburgh 27, Pa.

Exhibiting: Hallikainen's flame ionization gas chromatograph, industrial instru­ments, electrolyte, conductivity apparatus, and gas analysis instruments. Also Quik-Chex single pan deflection balance,

new

dual channel

recorder only

$495

laboratory

YSI