NEW PRODUCTS maximum efficiency, according to Beckman, and there is no foaming or aerosol effect at flow rates up to 600 ml. per min. The rotor is available with dis placement volumes of either 100 or 400 ml. P-6 Magnetic Oxygen Analyzer
Complete with attachments F.O.B. Las Vegas
$90
• Thyratron tubes on the Heller GT-21 controller sup ply demanded current by converting power in stepless variation to the direct cur rent motor. Assures con stant torque as mixes become either viscous or fluid. Vari able, reversible motor has direct and gear drive. Arma ture shaft speed, 0-5000 rpm. Gear shaft 18:1 ratio.Chuck, shafts, 3-step pulley included.
A null balance magnetic oxygen analyzer for analysis of oxygen in any mixture of common gases is being pro duced by The Distillers Company, Ltd., of England. The instrument measures magnetic susceptibility of a continu ously flowing sample, using a feedback system for achieving automatic opera tion. It is said to be insensitive to flow-rate fluctuations, tilting, shock, and vibrations. Lack of contact be tween the gas and hot wires or high voltages provides safety of operation.
Order from your Laboratory Supply Dealer or write—
GERALD K. HELLER CO. 1 8 1 9 Industrial Road
Las Vegas, Nevada
Circle Ho. 116 OD Readers' Service Card
CONTINUOUS CENTRIFUGATION SS-3 with Continuous Flow
8' to l'Tube Selectivity Pushbutton Automatic Controls with the Servall SS-3 Superspeed Centri fuge* plus selective 8-Tube collection with the unique Servall "SzentGyorgi & Blum" Continuous Flow System.* Also, the manually-con trolled Servall SS-4 Enclosed Superspeed Centrifuge* with remote^control. Exclusive Gyro-Action Self-Centering Drive.
I
ΪΛ-Φ
Write for Bulletin AC-3 S3
SS-4 with Remote Control
SS-34 Angle Superspeed 400 ml — 34,400 χ G
GSA Large Capacity 1,770 ml — 14,600 X G
* i P rtSÇâ su
Particle Counting 29,200 χ G — β cells
Other Rotors Under Development
Ivan Sorvall, Inc. NORWALK • C O N N E C T I C U T
Circle No. 138 on Readers' service Card
74 A
ANALYTICAL CHEMISTRY
HS Field-Aligning Horizontal* 28,800 X G •Patented: U.S.A. & Foreign SINCE 1943. THE WOBtD'S LARGEST MANUFACTURE* OF SUPERSPEED CENTRIFUGES
Any range from 0 - 1 % oxygen to 0 100% oxygen can be selected with a switch, and the limit of detection is 0.005% oxygen or 0.25% full scale de flection. The instrument is housed in two light alloy weatherproof cases and can be bolted to a framework indoors or outdoors. I t is designed for opera tion with a 5-mv. potentiometer re corder. P-7 Moisture Determination Balance A moisture determination balance with a claimed accuracy of ± 0 . 1 % is offered by Ohaus Scale Corp. for labo ratory or manufacturing control point use. The Model #6000 self-contained unit comprises a magnetically-damped analytical-type chain balance, with an infrared element in the heating cham ber. In use, the sample is placed on a low-cost disposable aluminum foil pan, where it is heated and dried. A single
