V O L U M E 23, NO. 1, J A N U A R Y
1951
33 A
ACCURACY - at High Operating
Speed
Despatch Laboratory Ovens
with
Despatch Laboratory and Production Ovens a r e ideally suited t o all t y p e s of research . . . t e s t i n g . . . p r o d u c t i o n control. T h e y are designed t o p r o v i d e t h e closest h e a t uniformity t h r o u g h ev ery inch of t h e w o r k c h a m b e r . . con sistently a c c u r a t e t e m p e r a t u r e control a t all h e a t s . . . a m p l e speed t o process
c a p a c i t y loads a t a n y desired o p e r a t i n g temperature. Chemical a n d analytical, d r y i n g a n d b a k i n g , p r e h e a t i n g a n d aging, steriliz ing a n d curing, food d e h y d r a t i n g — t h e s e a r e j u s t a few of t h e uses. Available in six models, w i t h inside dimensions r a n g ing from 1 3 " x l 3 " x l 3 " t o 37"x25"x50".
• Positive Air Intake • Guaranteed Heaf Elements 2 7 0 0 to 1 2 , 0 0 0 Watts • High V o l u m e Fan • Air Velocity Control • Accurate Indicating Control • Modern Design—Rounded Corners Manufacturers
of
Ovens
for
All
DESPATCH .Established
OVEN CO.
Purposes
ASK FOR BULLETIN NO. 106
in 1902 341 DESPATCH BLDG.
·
MINNEAPOLIS 14, M I N N
PHOTOVOLT Line-Operated
Electronic
pH METER A truly universal instrument • for accurate ρ Η readings in laboratory and factory use • for operation with any types and designs of electrodes • for pH tests, titration, and oxidation-reduction potentials • with 7" scale from pH 0 to 14, without reversal or switching • fully stabilized, for A C lines 90-275 volts 50-60 cycles • for continuous operation, also adaptable for recording • available with protective wooden housing for portability • furnished with shielded glass electrode, also available with shielded compartment for unshielded micro-electrodes Hermetically sealed amplifier for permanently reliable service even in humid atmospheres. M i n i m u m grid current for accurate measurement of non-aqueous samples including oils. Write
for 7-page descriptive
Bulletin
#110
to
PHOTOVOLT 95 Madison Ave.
CORP.
Also: Photoelectric Colorimeters and Fluorescence Meters, Reflection Meters, Densitometers, Electronic Photometers
New York 16, Ν . Ύ.
