BECKMAN INSTRUMENTS

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V O L U M E 2 4, N O . 5, MAY 1 9 S 2

13A

So s t r o n g that the pH-sensitive b u l b can withstand as much pressure as the thick stem itself! Abrasion resistant— unusually rugged for long life and reliable measurement even in highly abrasive slurries! Chemical durabi'//ty—excellent in the strongest acids a n d alkalis . . . even a t elevated temperatures!

3 0 ° t o 1 3 0 ° C at high pHw i t h the new high temperature—high pH glass. - 2 0 ° t o 100° C — w i t h the new general-purpose glass. W i l l withstand even repeated f r e e z i n g .

UnjpniwkribA; pH "Rait^e, 0 t o 14 pH — w i t h the high-temperature high-pH glass . . . only smalt reproducible deviation near extreme limits, even at high temperatures. 0 t o 11 pH — a t room temperap e r a t u r e a n d 0 to 10 pH a t b o i l i n g for the general-purpose g l a s s . . . without correction for sodium ions!

Hugged OmtuJtàim, Simplified, heat-resistant c o n s t r u c t i o n eliminates w a x f i l l i n g . . . retains patented Beckman internal shielding . . . increases measurement precision.

Only Beckman Glass Electrodes offer all of these features: • RAPID RESPONSE . . . a c c u r a c y

with

speed and c o n v e n i e n c e .

freezing to b o i l i n g and

above!

• ENTIRE pH SCALE . . . Very small

sodium

• STABILITY . . . to m a t c h the h i g h preci-

ion errors . . . e.g., with h i g h - t e m p e r a t u r e

sion of BECKMAN pH METERS.

h i g h - p H glass, only 0.2 p H deviation at

• INTERNAL SHIELDING . . . gives com-

13-7 p H in 1 Ν s o d i u m h y d r o x i d e .

p l e t e freedom from o u t s i d e electrostatic • FACTORY SEALED . . . rigidly tested . . .

interference. • INTEGRAL LEADS . . . C o n t i n u o u s

insu-

no maintenance.

lation i n t o t h e electrode . . . c o n n e c t i o n s

• U N I Q U E CHEMICAL D U R A B I L I T Y . . . i n

located on protected panel b o a r d .

a l k a l i . . . in acid . . . in d i l u t e solutions.

ί EXTREME TEMPERATURE

RANGE...

Several types p e r m i t use from

below

A n d . . . REALLY

TOUGH

Constant research over the years has maintained Beckman leadership in the instrumentation field . . . —Beckman pH Meters and Glass Electrodes —Beckman Ultraviolet, Visible and Infrared Spectrophotometers —Beckman Radioactivity Meters •—Special Beckman Instruments . . . a l l unsurpassed for dependability!

. . . can e v e n

b e used as a s t i r r i n g rod!

For complete details on the many types of Beckman pH Electrodes available write for Bulletin 2 - 1 5

BECKMAN INSTRUMENTS · South Pasadena, California

BECKMAN INSTRUMENTS control modern industries