NEW PRODUCTS noss cells, and for establishing working curves and absorption coefficients. The thickness may be varied from 0.015 millimeter to six millimeters, with vol ume varying from two to ten cubic cen timeters. Reproducibility of the cell is said to be better than plus or minus two mi crons. Linearity is plus or minus two per cent for cell settings of 50 microns and above. 12
Tune in on w h a t ' s n e w at the
26TH EXPOSITION OF CHEMICAL INDUSTRIES
Ionization Meter
The Baldwin Ionex ionization meter for measuring gamma and x-rays as well as alpha and beta particles is announced by Atomic Center for Instruments and Equipment, Inc. A 0.6-cc. chamber for measuring output of x-rays, depth dose, and penetration is normally supplied with^the instrument. If desired, a nom-
N e w York Coliseum, Dec. 2 - 6 , 1 9 5 7 M a k e y o u r plans now to a t t e n d with y o u r asso ciates. P l a n on seeing over 500 exhibits of n e w d e v e l o p m e n t s . . . n e w cost-cutting i m p r o v e m e n t s . . . new p r o d u c t s and t e c h n i q u e s t h a t can h e l p y o u in y o u r own o p e r a t i o n s . P r o c e s s e q u i p m e n t , instru m e n t a t i o n , packaging and handling, plus special sections on chemicals a n d raw materials, labora t o r y e q u i p m e n t and supplies. R e s e r v e t h e t i m e a n d place now on y o u r calendar. See t h e greatest exhibition ever of chemical progress. φ,310 M a n a g e m e n t : International Exposition Company 480 Lexington Ave., N e w York 17, Ν . Υ. For further information, circle number 107 A-1 on Readers' Service Card, page 99 A
You can measure
accurately
FEATURES
A micio-microammeter and millivoltmeter In one5 instrument · Measures currents from 10-te to 10amperes · 10, 100, and 1,000 mv ranges plus recorder output · Exclusive, diaphragm-type dynamic capacitor provides longer life, greater stability and reliability · High stability, both short and long term · Extremely high input im pedance— 1015 ohms · Better than 2% accuracy • $1,075.00 F.O.B. Carlstadt, N. J.
lonization meter
inal 600-cc. thin window ionization chamber can be provided. This is used to compare strength of alpha and beta sources, measure very soft x-rays, and check low level contamination. For consistency of calibration, a Weston standard cell is incorporated in the instrument. This is said by the company to have an electrical accuracy of better than one per cent in all ranges. An issued certificate gives correction factors to be applied at various energies. Barometric pressure and air temperature corrections, obtained from an alignment chart on the instrument, are preset on a dial. 13
TYPICAL
APPLICATIONS
Electronics:
with the
CURTISS -WRIGHT
Dynamic Capacitor Electrometer
Measurement of semi-conductor parameters, lowlevel voltages, static charges, floating grid po tentials, grid currents, residual noise in summing amplifiers, and insulation resistance Physics a n d C h e m i s t r y :
Mass spectrometry, pH measurements Nuclear:
Reactor control and radiation monitoring systems Industrial:
Beta and gamma gauge control systems Biophysics a n d M e d i c i n e :
Measurement of stomach acidity, skin and cell potentials.
ELECTRONICS DIVISION
Electronic Component & Instrument Sales Department
CURTISS-WRIGHT
For further information, see coupon on page 9 9 A
CORPORATION
'
CnRlSTADT, N. J.
For further information, circle number 107 A-2 on Readers' Service Card, page 99 A VOL.
2 9 , N O . 9 , SEPTEMBER
1957
·
107
A
