PHOTOVOLT CORPORATION

---

PHOTOVOLT DENSITOMETRY EQUIPMENT

New building-block system permits adding of units as required, from manual and semi-automatic operation to fullyautomatic recording and integrating

for ELECTROPHORESIS and CHROMATOGRAPHY

•

For scanning of electro-

phoresis strips and readings on large sheets in chromatography

•

For work in visible and

ultraviolet ranges

•

For evaluation

by color-

t r a n s m i s s i o n , r e f l e c t i o n or fluorescence •

For readings on f i l t e r pa-

per, agar, starch and other gels W r i t e for Bulletin 800-S to:

PHOTOVOLT CORPORATION 95 Madison Avenue

·

New York 1 6 , Ν. Υ. Circle No. 125 on Readers' Service Card

PHOTOVOLT A complete simple

Electronic

line of pH meters

in operation

incorporating

and maintenance,

modern

featuring

p H METERS electronic

sealed

tubes

amplifier

and

circuits,

plug-in

units.

Line-Operated M o d e l 8 5 * Single range 0-14, scale length 3 " , readable to 0.1 pH unit. * Fully stabilized, simple, compact, available with carrying case. * A full-fledged pH meter usable with al· types of electrodes Write for Bulletin #195 $135. Line-Operated Model 115 • Single range 0-14, scale length 4 " , readable to 0.05 pH unit. * Temperature control 20-60*"C f available with carrying case. * Additional millivolt scale for redox measurements and titrations. Write for Bulletin =225

MODEL

110

$175,

MODEL 85

Line-Operated M o d e l 1 1 0 * Single range 0-14, scale length 7'', readable to 0 02 pH unit. * Temperature control O l O O ' C , voilage selector tor 80-260 volts. * Available with carrying cover & baseboard for bottles, beakers. Write for Bulletin ïr 105

$235.—

Battery-Operated Model 125 • Single range 0 1 4 . scale length 5 ' i " , readable to 0.03 pH unit. * Only 3 batteries, standard radio type, 2,000 hours of servrce. * Available with carrying frame for instrument, beakers, bottles Writefor Bulletin ±-118

$195.

MODEL

125

All prices include sot of glast electrode and calomel electrode, or tomoinntion nialE-and-calnmel electrode (probe) See also Bulletin # 138 on pH Meter Tester Mod. 2 5 for checking the performance of pH meters without electrodes or buffers, applicable to pH meters of any make.

MODEL

115

PHOTOVOLT Circle No. 126 on Readers' Service Card

84 A

·

ANALYTICAL CHEMISTRY

$ 6 8 .

C O R P O R A T I O N 95 M A D I S O N A V E N U E . N . Y . 1 6 , Ν . Υ .