NEW PRODUCTS A.C. Null Detector Model 9844 has interchangeable filter units permitting operation on 50, 60, 400, or 1000 e.p.s. Five choices of sensitivity cover 10,000 to 1 range with
Detailed mass spectra impurity report provided by Bendix Mass Spectrometer helps Eastman Kodak's indusfrial laboratory guard high quality of photographic products.
EASTMAN KODAK APPLICATION TYPIFIES VALUE OF BENDIX MASS SPECTROMETER
maximum sensitivity of 0.3 μν. per scale division for source resistances up to 20,000 ohms. It has a period of less than 1 sec. for 50% full scale unbalance, and a noise level of less than 0.1 μν. peak-to-peak. Leeds & Northmp Co. P-31
BY IDENTIFYING MINOR CONSTITUENTS FOUND IN SOLVENTS, a Bendix Time-
of-Flight Mass Spectrometer helps maintain tight quality control over East man Kodak film. Similarly, important companies in chemicals, petroleum, food, drug, missiles, and many other OTHER FEATURES fields are using this scientific instru H i g h Resolution—usable adjacent mass ment to analyze products, mixtures, resolution beyond 5 0 0 a t o m i c mass and reactions in their research and units. W i d e Mass Range—each spectrum covers quality control programs. 1 through 4,000 a.m.u.'s. H i g h Sensitivity—demonstrated better than STUDY OF EXTREMELY FAST CHEMI 3 parts per m i l l i o n . CAL REACTIONS is possible because the Easily modified f o r special p r o b l e m s . Bendix Mass Spectrometer can make APPLICATIONS 10,000 analyses or mass spectra per Chromafograph output identification. second. An important feature is our M o l e c u l a r beam analysis using Bendix newly developed hot filament sample Knudsen Cell or Bendix Hot Filament Sample I n t r o d u c t i o n Systems (new Ben inlet system, available for new Bendix d i x accessories). Spectrometers and those now in use. Chemical kinetics research. Q u a n t i t a t i v e analysis. Together with line-of-sight sampling, I o n i z a t i o n p o t e n t i a l studies using v a r i this facilitates ready analysis of solids. a b l e electron energy (standard e q u i p ment). Bendix wide mass range and high reso Pyrolysis, p i l o t p l a n t , a n d n e g a t i v e ion lution are ideal for study of high studies. molecular weight materials. Display may be chart recording, oscilloscope scanning, or both simultaneously.
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BECAUSE THE ONE INSTRUMENT SERVES MANY USES in analyzing gases,
solids and liquids, i t gives greater value per-dollar-invested. To learn what advantages it may have for your busi ness, write . . .
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THE Bendix C O R P O R A T I O N
Export Sales: Bendix I n t e r n a t i o n a l D i v i s i o n , 2 0 5 East 4 2 n d Street, N e w York 1 7 , Ν . Υ . C a n a d a ; C o m p u t i n g Devices o f C a n a d a , L t d . , Box 5 0 8 , O t t a w a 4 , O n t a r i o . Circle No. 30 on Readers' Service Card 8 4 A
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ANALYTICAL
CHEMISTRY
Proportional Temperature Controller Electronic Model 60 features very narrow band proportional controller. A thermistor sensing element is nor mally used for temperatures up to 300° C , and a resistance bulb element is used above 300° C. A 10-turn po tentiometer gives set-point adjust ment, and a desired set-point can be reset to within 1/2000 of temperature span. Loe Engineering Co. P-32 Greaseless Vacuum Joint Glass O-ring joint does away with source of possible contamination; can be used for absolute pressures as low as 0.2 mm. with temperatures as high as 300° C. Available with arm inside di-
