Product Capsules
DRIERITE
Recorders. Info on low cost servographic unit. 102
Pick the Vacuum Pump that Fits Your Needs!
Recorders. New integrating unit is flush-mounting or portable. 163
NEW DRYING UNIT for AIR & GASES AT PRESSURES up to 90 psig
Recorders. Bulletin on linear/log servo-recorder.
versatile 90
Rings. New " 0 " ring connector sizes for vacuum apparatus. 140
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1400B—TWO-STAGE 0.1 MICRON i l LITERS/MINUTE
1404H —SINGLE-STAGE IWegner Pump) 20 MICRONS 33 4 LITERS/MINUTE
1403B-SINGLE-STAGE 5 MICRONS 100 LITERS/MINUTE
1405 H—TWO-STAGE 0.05 MICRON 3 3 . 4 LITERS/MINUTE
1402B—TWO-STAGE (Vented Exhaust) 0.1 MICRON 140 LITERS/MINUTE
1406H —SINGLE-STAGE 5 MICRONS 33.4 LITERS/MINUTE
1392—TWO-STAGE (Mechanical & Diffusion) 0.001 MICRON 6 0 0 LITERS/MINUTE (ai 0.1 micron)
I410B—SINGLE-STAGE (Wegner Pump) 20 MICRONS 21 LITERS/MINUTE
Sampling Units. Catalog details line of infrared sampling accessories. 43
Scalers. Brochure on transistorized scalers and timers. 21 Services. Data on measurement services.
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1398—TWO-STAGE (Vented Exhaust) 0.1 MICRON 1400 LITERS/MINUTE
Sample Changers. Full data on new automatic sample changer. 16
Scalers. For use with geiger and scin tillation counting. Catalog. 3 :;T:3
! 397B—TWO-STAGE {Vented Exhoust) 0.1 MICRON 425 LITERS/MINUTE
radiochemical 64
'
Services. Details on ultra-sensitive trace element determinations. 175 Showers. Catalog details emergency drench shower. 5
fti-v· ?*: '
Spectrographs. Data on 100 kv. con stant potential x-ray unit. 162 Spectrographs. Full info offered on direct-reading unit. 22 Spectrographs. Full data on 3.4 meter convertible Ebert unit offered. 123
2 5 / 8 " O.D. χ Ι Ι ' / β "
Spectrometers. Samples analyzed free onNMRunit. 180
LABORATORY GAS
Spectrometers. Bulletin on mass unit. Range : m/e 2 to m/e 700. 117
DRYING UNIT NOW AVAILABLE IN ACRYLIC PLASTIC T h e r e d e s i g n e d u n i t will provide exit d e w points o t —100 °F. a n d h a s a h e a v y d u t y aluminum cap. Flow rates m a y b e 2 0 0 liters per hour. Indicating DRIERITE c h a n g e s from b l u e t o p i n k when exhausted. (Specify t h e p l a s t i c m o d e l from y o u r L a b o r a t o r y S u p p l y Dealer.) Write for Bulletin
68.
W. A. HAMMOND DRIERITE CO. XENIA, OHIO
Spectrometers. Analysis in air and vacuum from one sample. 91 Spectrometers. Bulletin on new, me dium-priced mass unit. 44 Spectrometers. Compact, easy to use and maintain mass unit. 31 Spectrometers. Data on NMR spec tra catalog offered. 179 Spectrometers. Application data on non-destructive NMR unit. 178 Spectrometers. Brochure on direct reading reversion unit. 131 Spectrophotometers. new low cost IR unit.
Spectrophotometers. Double-beam double-monochromator IR unit. 27 Spectrophotometers. Unit measures reliably at high absorbances. 20 Spectrophotometers. cost UV-VIS unit.
Circle No. 46 on Readers' Service Card 146 A
·
ANALYTICAL
CHEMISTRY
Data file on 28
Compact, low 87
WELCH
DUO-SEAL VACUUM
PUMPS are designed
to fit almost every application better and at less cost . . . in the laboratory, industry and school. Ten different models to choose from . . . capacities from 21 to 1400 liters per minute . . . ultimate pressures from 2xlO-2mmHgdowntolxlO-'!mmHg and better . . . two-stage and singlestage mechanical pumps with vented exhaust, and mechanical and diffusion combination pumps. Over the years, Welch Duo-Seal Pumps have built a world-wide reputa tion for best performance, greatest reliability and quietest operation. When you use a Duo-Seal Pump, you're using the best ! For complete specifications and prices, ask for Duo-Seal Catalog
SINCE 1880
THE WELCH SCIENTIFIC COMPANY foremost manufacturers uf scientific equipment
1521 Sedgwick St. · Chicago 10, Ill. Circle No. 97 on Readers' Service Card
